Rechargeable lithium battery

Abstract

There is provided rechargeable lithium battery including electrode assembly, battery case accommodating electrode assembly, and gas trapping layer between battery case and electrode assembly, in which gas trapping layer includes compound represented by one selected from among Chemical Formulae 1 to 4: Chemical Formula 1 # imgabs0 # Chemical Formula 2 # imgabs1 # Chemical Formula 3 # imgabs2 # Chemical Formula 4 # imgabs3 #

Description

Technical Field

[0001] One or more embodiments of the present disclosure relate to a rechargeable lithium battery. Background Art

[0002] Research has been conducted to improve the capacity, energy density, and / or cycle-life characteristics of rechargeable batteries used as a power source for one or more suitable mobile devices and / or electric vehicles.

[0003] Recently, there has been a need and / or desire for a rechargeable battery that can be quickly charged and has good or suitable safety (such as not causing thermal runaway problems).

[0004] This requires research to improve fast charging and safety of rechargeable batteries while satisfying and maintaining physical properties of the battery, such as capacity. Summary of the invention

[0005] One or more aspects of the embodiments of the present disclosure relate to a rechargeable lithium battery that exhibits excellent or suitable swelling characteristics and safety. Additional aspects will be set forth in part in the description below, and in part will be clear from the description, or may be learned by practicing the disclosed embodiments given.

[0006] According to one or more embodiments of the present disclosure, a rechargeable lithium battery includes: an electrode assembly; a battery case accommodating the electrode assembly; and a gas capture layer between the electrode assembly and the battery case, wherein the gas capture layer includes a compound represented by one selected from Chemical Formula 1 to Chemical Formula 4.

[0007] Chemical formula 1

[0008]

[0009] Chemical formula 2

[0010]

[0011] Chemical formula 3

[0012]

[0013] Chemical formula 4

[0014]

[0015] In Chemical Formulae 1 to 4,

[0016] M can be iron (Fe), lithium (Li), magnesium (Mg), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), lead (Pb), palladium (Pd), TiO, VO, FeCl, FeO, BCl, AlCl, MnCl, GaCl, InCl, SiR 65 R 66 or Ru(Co),

[0017] x can be 1, 2 or 3,

[0018] y can be 1 or 2,

[0019] R 1 To R 66 may be independently the same or different, and may be independently hydrogen (H), alkyl, alkenyl, COOH, R 67 -COOH(R 67 is alkylene), benzyl, CHO, COCH 3 、COOCH 3 、CN、OH、OCH 3 NH 2 NHCH 3 NH 2 CH 3 、N(CH 3 ) 2 、NO 2 、SO 3 H or halogen.

[0020] Other embodiments of the present disclosure will be described in the detailed description.

[0021] The rechargeable lithium battery according to one or more embodiments may exhibit excellent or suitable swelling characteristics and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent through the following description in conjunction with the accompanying drawings.

[0023] Figure 1 is a schematic diagram illustrating a rechargeable lithium battery according to one or more embodiments of the present disclosure.

[0024] Figure 2 is a schematic diagram illustrating a rechargeable lithium battery according to one or more embodiments of the present disclosure.

[0025] Figure 3 is a schematic diagram illustrating a rechargeable lithium battery according to one or more embodiments of the present disclosure.

[0026] Figure 4is a schematic diagram showing a rechargeable lithium battery according to still another embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, example embodiments are described in more detail. However, these embodiments are merely examples, and the present disclosure is not limited thereto, and the present disclosure is defined by the scope of the claims and their equivalents.

[0028] As used herein, if (for example, when) no definition is otherwise provided, it will be understood that if (for example, when) an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

[0029] Unless otherwise stated in the disclosure, as used herein, the singular forms "one", "one (kind / person)", and "the (described)" are intended to also include plural forms, unless the context clearly indicates otherwise. In addition, the use of "may" when describing an embodiment of the present disclosure refers to "one or more embodiments of the present disclosure". Unless otherwise stated, the phrases "A and / or B" or "A or B" may mean "including A, including B, or including A and B". In addition, the " / " used herein may be interpreted as "and" or "or" depending on the circumstances. When expressions such as "at least one (kind / person) of...", "one (kind / person) of...", and "selected from..." are placed before or after a list of elements, the entire list of elements is modified rather than the individual elements in the list. For example, "at least one of a, b or c", "at least one of a, b and / or c", "at least one selected from a, b and c", "at least one selected from a to c", etc. may mean only a, only b, only c, both a and b (e.g., a and b at the same time), both a and c (e.g., a and c at the same time), both b and c (e.g., b and c at the same time), all of a, b and c, or variations thereof.

[0030] As used herein, the term "combination thereof" may include mixtures, stacks, complexes, copolymers, alloys, blends, reactants of components.

[0031] As used herein, if (for example, when) no definition is provided in addition, particle diameter / particle size can be average particle diameter / average particle size.Such particle diameter / particle size represents the average particle diameter / average particle size (D50) of about 50 volume % of cumulative volume in particle size distribution.Average particle diameter / average particle size (D50) can be measured by methods well known to those skilled in the art (for example, by particle size analyzer (for example, HORIBA, LA-950 laser particle size analyzer) or by transmission electron microscope (TEM) or scanning electron microscope (SEM)).In certain embodiments, dynamic light scattering measurement device can be utilized to carry out data analysis, and the number of particles for each size range is counted, thus average particle diameter / average particle size (D50) value can be easily obtained by calculation.In one or more embodiments, particle size can be measured by laser diffraction method. Laser diffraction can be obtained by dispersing the particles to be measured in a dispersion solvent and introducing it into a commercially available laser diffraction particle measuring device (e.g., MT 3000 purchased from Microtrac), irradiating ultrasonic waves of about 28 kHz at a power of about 60 W, and calculating the average particle diameter / average particle size (D50) in the 50% standard particle distribution in the measuring device. In the present disclosure, when the particles are spherical, "diameter" means the average particle diameter, and when the particles are non-spherical, "diameter" means the major axis length.

[0032] According to one or more embodiments of the present disclosure, a rechargeable lithium battery may include: an electrode assembly; a battery case accommodating the electrode assembly; and a gas capture layer between the electrode assembly and the battery case, wherein the gas capture layer includes a compound represented by one selected from Chemical Formula 1 to Chemical Formula 4.

[0033] Chemical formula 1

[0034]

[0035] Chemical formula 2

[0036]

[0037] Chemical formula 3

[0038]

[0039] Chemical formula 4

[0040]

[0041] In Chemical Formulae 1 to 4,

[0042] M can be iron (Fe), lithium (Li), magnesium (Mg), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), lead (Pb), palladium (Pd), TiO, VO, FeCl, FeO, BCl, AlCl, MnCl, GaCl, InCl, SiR 65 R 66 or Ru(Co),

[0043] X can be 1, 2 or 3,

[0044] y can be 1 or 2,

[0045] R 1 To R 66 Each independently may be the same or different and may be H, alkyl, alkenyl, COOH, R 67 -COOH(R 67 is alkylene), benzyl, CHO, COCH 3 、COOCH 3 、CN、OH、OCH 3 NH 2 NHCH 3 NH 2 CH 3 、N(CH 3 ) 2 、NO 2 、SO 3 H or halogen.

[0046] In one or more embodiments, the alkyl group may be a substituted or unsubstituted alkyl group, such as a C1 to C10 alkyl group. The alkenyl group may be a substituted or unsubstituted alkenyl group, such as a C2 to C20 alkenyl group. The functional group (e.g., substituent) in "substituted" may be, for example, a C1 to C10 hydrocarbon group, a hydroxyalkyl group, or an alkoxyalkyl group.

[0047] The halogen may be fluorine (F), chlorine (Cl), bromine (Br) or iodine (I).

[0048] In one or more embodiments, the compound can be a compound wherein M is Fe, x is 2 or 3, and y is 1. For example, in some embodiments, the compound can be iron phthalocyanine, iron phthalocyanine chloride, hemoglobin iron, myoglobin iron, or (e.g., any suitable) combination thereof.

[0049] Such compounds have the potential to capture O that may be generated during charging and discharging. 2 and / or CO 2The conjugated structure of the battery can effectively inhibit or reduce the swelling caused by the generation of these gases, and can inhibit or reduce the internal thermal runaway (e.g., combustion) of the battery, thereby preventing or reducing the explosion of the battery. This can improve the safety of the battery.

[0050] Non-limiting examples of the compound may be compounds represented by Chemical Formula 1a to Chemical Formula 1s.

[0051] Chemical formula 1a

[0052]

[0053] Chemical formula 1b

[0054]

[0055] Chemical formula 1c

[0056]

[0057] Chemical formula 1d

[0058]

[0059] Chemical formula 1e

[0060]

[0061] Chemical formula 1f

[0062]

[0063] Chemical formula 1g

[0064]

[0065] Chemical formula 1h

[0066]

[0067] Chemical formula 1i

[0068]

[0069] Chemical formula 1j

[0070]

[0071] Chemical formula 1k

[0072]

[0073] Chemical formula 1l

[0074]

[0075] Chemical formula 1m

[0076]

[0077] Chemical formula 1n

[0078]

[0079] Chemical formula 1o

[0080]

[0081] Chemical formula 1p

[0082]

[0083] Chemical formula 1q

[0084]

[0085] Chemical formula 1r

[0086]

[0087] Chemical formula 1s

[0088]

[0089] Among the compounds represented by Chemical Formula 1 according to one or more embodiments, wherein M is Fe, x is 2, y is 1, and R 1 To R 16 The compound in which all are hydrogen may be represented by Chemical Formula 10a. In some embodiments, the compound may be represented by Chemical Formula 10b.

[0090] Chemical formula 10a

[0091]

[0092] Chemical formula 10b

[0093]

[0094] In one or more embodiments, as an example of a compound represented by Chemical Formula 1, wherein M is FeCl, x is 3, y is 1, and R 1 To R 16 The compound in which all elements are hydrogen can be represented by Chemical Formula 10c.

[0095] Chemical formula 10c

[0096]

[0097] In one or more embodiments, the gas capture layer refers to a layer for capturing gas generated in a battery.

[0098] In one or more embodiments, the thickness of the gas capture layer may be about 10 μm or more, about 10 μm to about 600 μm, or about 200 μm to about 400 μm. If the thickness of the gas capture layer is about 100 μm or more, the gas generated inside the battery (e.g., O 2 and / or CO 2 ). If the thickness of the gas capture layer is at most 600 μm, the effect of capturing gas can be substantially obtained while maintaining the energy density of the battery.

[0099] The amount of the compound represented by one selected from Chemical Formula 1 to Chemical Formula 4 may be about 5 wt % to about 99 wt %, about 10 wt % to about 95 wt %, or about 30 wt % to about 95 wt %, based on 100 wt % of the total weight of the gas capture layer. If the amount of the compound represented by one selected from Chemical Formula 1 to Chemical Formula 4 is within this range, the gas generated in the battery can be sufficiently captured, thereby further improving the safety effect.

[0100] In one or more embodiments, the gas capture layer may include a binder. If the gas capture layer includes a binder, the amount of the binder may be about 1 wt% to about 95 wt%, about 5 wt% to about 90 wt%, or about 5 wt% to about 70 wt%, based on 100 wt% of the total weight of the gas capture layer. The binder may be polyvinylidene fluoride (e.g., polyvinylidene fluoride), polyvinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP, polyvinylidene fluoride-co-hexafluoropropylene) and / or their (e.g., any suitable) combination.

[0101] In one or more embodiments, the gas capture layer may be coated on the battery housing and may be included in the battery. The rechargeable lithium battery according to one or more embodiments may also include an insulating tape around the electrode assembly (e.g., around the electrode assembly), and the gas capture layer may be coated on the insulating tape and may be included in the battery. For example, in some embodiments, the gas capture layer may be coated on the insulating tape so that the coating surface may be arranged to contact the battery housing, or the coating surface may be arranged to contact the electrode assembly. For example, in one or more embodiments, the gas capture layer may be arranged between the insulating tape and the battery housing, or the gas capture layer may be arranged between the electrode assembly and the insulating tape. The rechargeable lithium battery according to one or more embodiments may also include a finishing tape (or finishing tape, finishing tape) around the electrode assembly (e.g., around the electrode assembly) to fix the electrode assembly without loosening during the insertion of the electrode assembly into the battery housing, and the gas capture layer may be coated on the finishing tape and may be included in the battery. If the rechargeable lithium battery includes both an insulating tape and a finishing tape (for example, including both the insulating tape and the finishing tape at the same time), the finishing tape can be arranged to contact the battery case, and the gas capture layer can be arranged between the insulating tape and the finishing tape or can be arranged between the finishing tape and the battery case, or the gas capture layer can also be arranged between the electrode assembly and the insulating tape.

[0102] For example, the gas capture layer can be formed by any process as long as it can be formed between the electrode assembly and the battery case. However, if the gas capture layer formation is performed directly on the separator of the electrode assembly, a short circuit may occur, so it is inappropriate or unsuitable to perform the formation directly on the separator.

[0103] Hereinafter, an exemplary process of forming a gas capture layer will be briefly described.

[0104] According to one or more embodiments of the present disclosure, a gas capture compound (i.e., a compound represented by one selected from Chemical Formula 1 to Chemical Formula 4) and a binder are mixed in a solvent to prepare a gas capture layer composition. The binder may be polyvinylidene fluoride (e.g., polyvinylidene fluoride), polyvinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP, polyvinylidene fluoride-co-hexafluoropropylene) and / or their (e.g., any suitable) combination. The solvent may be an organic solvent (such as N-methylpyrrolidone, etc.). The mixing ratio of the gas capture compound and the binder may be about 5:95 weight ratio to about 10:90 weight ratio, about 50:50 weight ratio to about 80:20 weight ratio, or about 90:10 weight ratio to about 99:1 weight ratio. If the mixing ratio of the gas capture compound to the binder is within this range, it may be beneficial to combine with an outer tank (e.g., a battery housing).

[0105] The gas capture layer composition may be coated on a coating target and dried to prepare a gas capture layer. Drying may be performed at about 60°C to about 140°C or about 80°C to about 120°C.

[0106] According to one or more embodiments, another method for preparing a gas capture layer may include adding a binder to a solvent (e.g., a first solvent) to prepare a binder liquid, adding a gas capture compound liquid (e.g., a gas capture compound liquid prepared by dissolving a gas capture compound in a second solvent) to the binder liquid to prepare a gas capture layer composition, coating the gas capture layer composition on a coating target and drying. Drying may be performed at about 60°C to about 140°C or about 80°C to about 120°C.

[0107] The application of the gas capture layer composition can be performed by spraying, spraying using a slot die, or dip coating.

[0108] According to one or more embodiments, another method for preparing a gas capture layer may include applying an adhesive liquid to a battery housing to prepare an adhesive layer, applying a gas capture compound liquid to the adhesive layer and drying. The adhesive liquid may be prepared by adding an adhesive to a first solvent, and the gas capture compound liquid may be prepared by adding a gas capture compound to a second solvent. The adhesive, the first solvent, and the second solvent may be the same as the above-mentioned adhesive and solvent, and the first solvent and the second solvent may be the same or different from each other. Coating and drying may be performed by a process substantially the same as that described herein.

[0109] According to one or more embodiments, the gas capture layer can be prepared by attaching a double-sided tape to a coating target and then attaching a gas capture compound to the double-sided tape. The double-sided tape can be any double-sided tape, and it can attach a gas capture material (e.g., a gas capture compound) to a battery case (e.g., a can or a bag) as an external material without an adhesive solution.

[0110] In one or more embodiments, the battery housing can be any housing used in the battery (such as a metal can, a metal laminate and / or a metal bag, etc.). The metal can be aluminum, a nickel alloy, but the embodiments of the present disclosure are not limited thereto. The nickel alloy can be an alloy of nickel and M (wherein M is copper (Cu), iron (Fe), chromium (Cr), titanium (Ti), molybdenum (Mo), niobium (Nb), aluminum (Al), manganese (Mn), silicon (Si), tungsten (W), cobalt (Co), carbon (C) (non-metal) and / or their (e.g., any suitable) combination). For example, the nickel alloy can be Ni-Cu, Ni-Fe, Ni-Cr, Ni-Ti, Ni-Mo, Ni-Nb, Ni-Al, Ni-Mn, Ni-Si, Ni-W, Ni-Co, Ni-C, Ni-Cr-Fe, Ni-Cr-Mo, Ni-Cr-Co or Ni-Cr-Fe-Mo.

[0111] In one or more embodiments, the rechargeable lithium battery can be a pouch battery, a can battery, or a combination thereof. In some embodiments, a can battery can refer to a battery whose battery housing is a can type or can-like battery, and can be a cylindrical battery or a prismatic battery.

[0112] Electrode assembly

[0113] An electrode assembly according to one or more embodiments may include a positive electrode, a separator, and a negative electrode.

[0114] Positive electrode

[0115] In one or more embodiments, the positive electrode may include a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector. The positive electrode active material layer may include a positive electrode active material, and may further include a binder and / or a conductive material.

[0116] The amount of the positive electrode active material may be about 90 wt % to about 99.5 wt % based on 100 wt % of the total weight of the positive electrode active material layer, and the amount of the binder and the conductive material may each be about 0.5 wt % to about 5 wt % based on 100 wt % of the total weight of the positive electrode active material layer.

[0117] For example, in some embodiments, the positive electrode may also include an additive that may function as a sacrificial positive electrode.

[0118] The positive electrode active material may include a lithiated intercalation compound that reversibly intercalates and deintercalates lithium ions. In some embodiments, at least one of a composite oxide selected from lithium and a metal selected from cobalt, manganese, nickel, and their (e.g., any suitable) combination (e.g., a metal selected from cobalt, manganese, nickel, and their (e.g., any suitable) combination) may be used.

[0119] The composite oxide may be a lithium transition metal composite oxide, and non-limiting examples thereof may include lithium nickel-based oxides, lithium cobalt-based oxides, lithium manganese-based oxides, lithium iron phosphate-based compounds, cobalt-free nickel manganese-based oxides, and / or (e.g., any suitable) combinations thereof.

[0120] In one or more embodiments, one or more of the compounds represented by any one of the following chemical formulas may be used: Li a A 1-b X b O 2-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Mn 2-b X b O 4-c D c (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.05); Li a Ni 1-b-c Co b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni 1-b-c Mn b X c O 2-α D α (0.90≤a≤1.8, 0≤b≤0.5, 0≤c≤0.5, 0<α<2); Li a Ni b Co c L 1 d G e O 2 (0.90≤a≤1.8, 0≤b≤0.9, 0≤c≤0.5, 0≤d≤0.5, 0≤e≤0.1); Li a NeG b O 2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a CoG b O 2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1-b G b O 2 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn2 G b O 4 (0.90≤a≤1.8, 0.001≤b≤0.1); Li a Mn 1- g G g PO 4 (0.90≤a≤1.8, 0≤g≤0.5); Li (3-f) Fe 2 (PO 4 ) 3 (0≤f≤2);Li a FePO 4 (0.90≤a≤1.8).

[0121] In the above chemical formula, A may be Ni, Co, Mn, and / or (e.g., any suitable) combination thereof; X may be Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, a rare earth element, and / or (e.g., any suitable) combination thereof; D may be O, F, S, P, and / or (e.g., any suitable) combination thereof; G may be Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, and / or (e.g., any suitable) combination thereof; and L may be 1 It may be Mn, Al and / or (eg, any suitable) combination thereof.

[0122] For example, in one or more embodiments, the positive electrode active material may be a high nickel-based positive electrode active material, and the amount of nickel in the high nickel-based positive electrode active material is greater than or equal to about 80 mol%, greater than or equal to about 85 mol%, greater than or equal to about 90 mol%, greater than or equal to about 91 mol%, or greater than or equal to about 94 mol% and less than or equal to about 99 mol%, based on the total moles of metals other than lithium in the lithium transition metal composite oxide (100 mol%). The high nickel-based positive electrode active material can achieve high capacity and can be applied to high-capacity, high-density rechargeable lithium batteries.

[0123] The binder improves the bonding properties between the positive electrode active material particles and between the positive electrode active material particles and the positive electrode current collector. Examples of the binder may be polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, diacetyl cellulose, polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, ethylene oxide-containing polymers, polyvinyl pyrrolidone, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, styrene butadiene rubber, (meth) acrylated styrene butadiene rubber, epoxy resin, (meth) acrylic resin, polyester resin and / or nylon, etc., but the embodiments of the present disclosure are not limited thereto.

[0124] A conductive material may be included to provide electrode conductivity, and any conductive material may be used as the conductive material unless it causes a chemical change. Non-limiting examples of the conductive material may include: carbon-based materials such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fiber, carbon nanofiber and / or carbon nanotube, etc.; metal-based materials of metal powder or metal fiber including copper, nickel, aluminum and / or silver, etc.; conductive polymers such as polyphenylene derivatives; or mixtures thereof.

[0125] The positive electrode current collector may include Al, but the embodiments of the present disclosure are not limited thereto.

[0126] Negative electrode

[0127] The negative electrode may include a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector. The negative electrode active material layer may include a negative electrode active material, and may further include a binder and / or a conductive material.

[0128] For example, in one or more embodiments, the negative electrode active material layer may include about 90 wt % to about 99 wt % of the negative electrode active material and about 1 wt % to about 10 wt % of the binder, or may include about 90 wt % to about 99 wt % of the negative electrode active material, about 0.5 wt % to about 5 wt % of the binder, and about 0.5 wt % to about 5 wt % of the conductive material.

[0129] The negative electrode active material may include a material that reversibly intercalates / deintercalates lithium ions, lithium metal, a lithium metal alloy, a material capable of doping / dedoping lithium, and / or a transition metal oxide.

[0130] The material that reversibly intercalates / deintercalates lithium ions may include a carbon-based negative electrode active material, such as crystalline carbon, amorphous carbon, and / or their (e.g., any suitable) combination. Crystalline carbon may be graphite, such as natural graphite or artificial graphite of unspecified shape (e.g., irregular shape), flake, flaky, spherical or fibrous shape. Amorphous carbon may be soft carbon, hard carbon, mesophase pitch carbonization product, and / or calcined coke, etc.

[0131] The lithium metal alloy may include an alloy of lithium and a metal such as sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), silicon (Si), antimony (Sb), lead (Pb), indium (In), zinc (Zn), barium (Ba), radium (Ra), germanium (Ge), aluminum (Al), and tin (Sn) (e.g., a metal selected from among sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), francium (Fr), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), silicon (Si), antimony (Sb), lead (Pb), indium (In), zinc (Zn), barium (Ba), radium (Ra), germanium (Ge), aluminum (Al), and tin (Sn)).

[0132] The material capable of doping / dedoping lithium may be a Si-based negative electrode active material or a Sn-based negative electrode active material. The Si-based negative electrode active material may include silicon, a silicon-carbon composite, SiO x (0 < x ≤ 2), a Si-Q alloy (where Q is selected from among alkali metals, alkaline earth metals, group 13 elements, group 14 elements (excluding Si), group 15 elements, group 16 elements, transition metals, rare earth elements, and / or any suitable combination thereof). The Sn-based negative electrode active material may include Sn, SnO 2 , Sn-based alloys, and / or any suitable combination thereof.

[0133] The silicon-carbon composite may be a composite of silicon and amorphous carbon. According to one or more embodiments, the silicon-carbon composite may be in the form of silicon particles and amorphous carbon coated on the surface of the silicon particles. For example, in some embodiments, the silicon-carbon composite may include secondary particles (cores) in which primary silicon particles are aggregated and an amorphous carbon coating (shell) on the surface of the secondary particles. Amorphous carbon may also be between the primary silicon particles. For example, the primary silicon particles may be coated with amorphous carbon. The secondary particles may be dispersed in an amorphous carbon matrix.

[0134] The silicon particles may be silicon nanoparticles. In one or more embodiments, the average particle size of the silicon nanoparticles may be from about 10 nm to about 1,000 nm. For example, in some embodiments, the average particle size of the silicon nanoparticles may be from about 20 nm to about 900 nm, from about 20 nm to about 800 nm, from about 20 nm to about 500 nm, from about 20 nm to about 300 nm, or from about 20 nm to about 150 nm. If the average particle size of the silicon nanoparticles is within this range, excessive volume expansion caused during charging and discharging can be suppressed or reduced, and breakage of the conduction path due to particle fragmentation can be prevented or reduced.

[0135] The silicon-carbon composite may also include crystalline carbon.For example, in one or more embodiments, the silicon-carbon composite may include a core including crystalline carbon and silicon particles and an amorphous carbon coating on a surface of the core.

[0136] If (for example, when) the silicon-carbon composite includes silicon particles, crystalline carbon and amorphous carbon, the amount of amorphous carbon may be about 30 wt % to about 70 wt % based on 100 wt % of the total weight of the silicon-carbon composite, and the amount of crystalline carbon may be about 1 wt % to about 20 wt % based on 100 wt % of the total weight of the silicon-carbon composite. The amount of silicon particles may be about 20 wt % to about 69 wt % based on 100 wt % of the total weight of the silicon-carbon composite, or according to one or more embodiments, the amount of silicon particles may be about 30 wt % to about 60 wt %.

[0137] In one or more embodiments, a Si-based negative electrode active material or a Sn-based negative electrode active material may be used together with a carbon-based negative electrode active material.

[0138] In some embodiments, a silicon-carbon composite may be included as a first negative electrode active material, and crystalline carbon may be included as a second negative electrode active material. The mixing ratio of the first negative electrode active material and the second negative electrode active material may be about 1:99 weight ratio to about 99:1 weight ratio. In some embodiments, the negative electrode active material may include a first negative electrode active material and a second negative electrode active material in a weight ratio of about 1:99 to about 50:50 or a weight ratio of about 5:95 to about 20:80.

[0139] The average particle size of the Si—C composite may be appropriately controlled or selected, and the embodiments of the present disclosure are not limited thereto.

[0140] The binder improves the bonding properties between the negative electrode active material particles and between the negative electrode active material particles and the negative electrode current collector. The binder can be a non-aqueous (e.g., water-insoluble) binder, an aqueous (e.g., water-soluble) binder, a dry binder and / or (e.g., any suitable) combination thereof.

[0141] The non-aqueous binder may include polyvinyl chloride, carboxylated polyvinyl chloride, polyvinyl fluoride, ethylene propylene copolymer, polystyrene, polyurethane, polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polypropylene, polyamideimide, polyimide, and / or (eg, any suitable) combinations thereof.

[0142] The aqueous adhesive may include styrene-butadiene rubber, (meth)acrylated styrene-butadiene rubber, (meth)acrylonitrile-butadiene rubber, (meth)acrylic rubber, butyl rubber, fluororubber, polyethylene oxide, polyvinyl pyrrolidone, polyepichlorohydrin, polyphosphazene, poly(meth)acrylonitrile, ethylene propylene diene copolymer, polyvinyl pyridine, chlorosulfonated polyethylene, latex, polyester resin, (meth)acrylic resin, phenolic resin, epoxy resin, polyvinyl alcohol and / or (e.g., any suitable) combination thereof.

[0143] As a binder for the negative electrode, a cellulose compound can be used. In some embodiments, an aqueous binder can be used as a binder for the negative electrode together with a cellulose compound. Cellulose compounds include one or more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose and their alkali metal salts. The alkali metal can be Na, K or Li. Cellulose compounds can be called thickeners to impart viscosity, and can be used as binders to be called binders. The amount of the cellulose compound can be appropriately and / or suitably adjusted, and embodiments of the present disclosure are not limited thereto.

[0144] The dry binder may be a polymer material that can be fiberized. For example, the dry binder may be polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer, polyethylene oxide, and / or any suitable combination thereof.

[0145] In one or more embodiments, a conductive material may be included to provide electrode conductivity, and any conductive material may be used as the conductive material unless it causes a chemical change. Non-limiting examples of conductive materials may be: carbon-based materials such as natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fiber, carbon nanofiber and / or carbon nanotube, etc.; metal-based materials of metal powder or metal fiber, including copper, nickel, aluminum and / or silver, etc.; conductive polymers such as polyphenylene derivatives; or mixtures thereof.

[0146] The negative electrode current collector may include one of copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, a polymer substrate coated with a conductive metal, and a combination thereof (e.g., any suitable combination) (e.g., one selected from copper foil, nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, a polymer substrate coated with a conductive metal, and a combination thereof (e.g., any suitable combination)), but the embodiments of the present disclosure are not limited thereto.

[0147] Electrolyte

[0148] The electrolyte may include a non-aqueous organic solvent and a lithium salt.

[0149] The non-aqueous organic solvent may be a carbonate solvent, an ester solvent, an ether solvent, a ketone solvent or an alcohol solvent, an aprotic solvent and / or (eg, any suitable) combination thereof.

[0150] The carbonate solvent may include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), ethyl methyl carbonate (MEC), ethylene carbonate (EC), propylene carbonate (PC) and / or butylene carbonate (BC), etc.

[0151] The ester solvent may include methyl acetate, ethyl acetate, n-propyl acetate, dimethyl acetate, methyl propionate, ethyl propionate, decanoic acid lactone, mevalonolactone, valerolactone and / or caprolactone, etc.

[0152] Ether solvents may include dibutyl ether, tetraglyme, diglyme, dimethoxyethane, 2-methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran and / or tetrahydrofuran, etc. Ketone solvents may include cyclohexanone, etc. Alcohol solvents may include ethanol and / or isopropanol, etc., and aprotic solvents may include: nitrile, such as R-CN (wherein R is a C2 to C20 straight chain, branched or cyclic hydrocarbon group, and may include a double bond, an aromatic ring and / or an ether bond, etc.); amides, such as dimethylformamide; dioxolanes, such as 1,3-dioxolanes and / or 1,4-dioxolanes, etc.; and / or sulfolane; etc.

[0153] The nonaqueous organic solvents may be used alone or in combination of two or more.

[0154] If a carbonate-based solvent is used, a cyclic carbonate and a chain carbonate may be mixed and used, and the cyclic carbonate and the chain carbonate may be mixed in a volume ratio of about 1:1 to about 1:9.

[0155] The lithium salt dissolved in the organic solvent provides lithium ions in the battery, enables basic operation of the rechargeable lithium battery, and improves the transport of lithium ions between the positive electrode and the negative electrode. Non-limiting examples of lithium salts may include LiPF 6 , LiBF 4 、LiSbF 6 、LiAsF 6 、LiClO 4 、LiAlO 2 、LiAlCl 4 、LiPO 2 F 2 、LiCl、LiI、LiN(SO 3 C 2 F 5 ) 2 、Li(FSO2 ) 2 N(lithium bis(fluorosulfonyl)imide, LiFSI), LiC 4 F 9 SO 3 、LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 )(wherein x and y are integers from about 1 to about 20), at least one of lithium trifluoromethanesulfonate, lithium tetrafluoroethanesulfonate, lithium difluorobis(oxalato)phosphate (LiDFBOP), and lithium bis(oxalato)borate (LiBOB) (e.g., selected from LiPF 6 , LiBF 4 、LiSbF 6 、LiAsF 6 、LiClO 4 、LiAlO 2 、LiAlCl 4 、LiPO 2 F 2 、LiCl、LiI、LiN(SO 3 C 2 F 5 ) 2 、Li(FSO 2 ) 2 N(lithium bis(fluorosulfonyl)imide, LiFSI), LiC 4 F 9 SO 3 、LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 )(wherein x and y are integers of about 1 to about 20), at least one of lithium trifluoromethanesulfonate, lithium tetrafluoroethanesulfonate, lithium difluorobis(oxalato)phosphate (LiDFBOP) and lithium bis(oxalato)borate (LiBOB)).

[0156] Depending on the type or kind of the rechargeable lithium battery, the separator may be present between the positive electrode and the negative electrode. The separator may include polyethylene, polypropylene, polyvinylidene fluoride, or a multilayer film of two or more layers thereof, and a mixed multilayer film such as a polyethylene / polypropylene double-layer separator, a polyethylene / polypropylene / polyethylene three-layer separator, and / or a polypropylene / polyethylene / polypropylene three-layer separator.

[0157] The separator may include a porous substrate and a coating on one or both (eg, simultaneously) surfaces (eg, opposing surfaces) of the porous substrate, the coating including an organic material, an inorganic material, and / or (eg, any suitable) combination thereof.

[0158] The porous substrate can be a polymer film formed by any one selected from polyolefins (such as polyethylene and / or polypropylene), polyesters (such as polyethylene terephthalate and / or polybutylene terephthalate), polyacetals, polyamides, polyimides, polycarbonates, polyether ketones, polyarylether ketones, polyetherimides, polyamideimides, polybenzimidazoles, polyethersulfones, polyphenylene oxides, cyclic olefin copolymers, polyphenylene sulfide, polyethylene naphthalate, glass fibers, Teflon and polytetrafluoroethylene, or copolymers thereof or mixtures of two or more thereof.

[0159] The organic material may include a polyvinylidene fluoride-based polymer and / or a (meth)acrylic-based polymer.

[0160] Inorganic materials may include Al 2 O 3 、SiO 2 、TiO 2 SnO 2 、CeO 2 , MgO, NiO, CaO, GaO, ZnO, ZrO 2 , Y 2 O 3 、SrTiO 3 、BaTiO 3 Mg(OH) 2 , boehmite and / or (e.g., any suitable) combination thereof (e.g., selected from Al 2 O 3 、SiO 2 、TiO 2 SnO 2 、CeO 2 , MgO, NiO, CaO, GaO, ZnO, ZrO 2 , Y 2 O 3 、SrTiO 3 、BaTiO 3 Mg(OH) 2 , boehmite, and / or inorganic particles thereof (eg, any suitable) combination), but embodiments of the present disclosure are not limited thereto.

[0161] An organic material and an inorganic material may be mixed in one coating layer, or a coating layer including an organic material and a coating layer including an inorganic material may be stacked.

[0162] Insulation tape

[0163] The rechargeable lithium battery according to one or more embodiments may further include an insulating tape. In some embodiments, the insulating tape may at least partially surround an electrode assembly in which a positive electrode, a separator, and a negative electrode are stacked and may be included in the rechargeable lithium battery, or the insulating tape may completely surround the electrode assembly and may also be included in the rechargeable lithium battery.

[0164] In one or more embodiments, a gas capture layer may be present between the insulating tape and the battery case, and this may enable further improvement in battery safety.

[0165] The insulating tape may completely surround the electrode assembly, and if (for example, when) a gas capture layer according to one or more embodiments may be present on the insulating tape and the electrode assembly is inserted into a battery casing, the gas capture layer may be present between the insulating tape and the battery casing or between the insulating tape and the electrode assembly.

[0166] The insulating tape may be made of a polymer having insulating properties capable of preventing or reducing battery short circuits, and the type or kind of the polymer is not limited, but may be, for example, polyethylene terephthalate, polyimide, and / or (eg, any suitable) combination thereof.

[0167] Finishing belt

[0168] The rechargeable lithium battery according to some embodiments may further include a finishing tape partially surrounding the electrode assembly. The finishing tape is used to fix the electrode assembly to prevent the electrode assembly from loosening during insertion of the electrode assembly into the battery case.

[0169] The finishing belt may be polypyrrolidone, polyethylene terephthalate, polystyrene, oriented polystyrene (OPS), and / or (eg, any suitable) combinations thereof.

[0170] In one or more embodiments, the gas capture layer may be coated on the finishing tape, for example, in some embodiments, the gas capture layer may be arranged between the finishing tape and the battery housing. In some embodiments, if the rechargeable lithium battery includes both the insulating tape and the finishing tape (for example, including both the insulating tape and the finishing tape), the finishing tape may be arranged to contact the battery housing, the gas capture layer may be arranged between the insulating tape and the finishing tape or may be arranged between the finishing tape and the battery housing, or the gas capture layer may be arranged between the electrode assembly and the insulating tape.

[0171] Rechargeable lithium batteries can be classified into lithium ion batteries, lithium ion polymer batteries or lithium polymer batteries according to the types (kinds) of separators and electrolytes, can be classified into cylindrical, prismatic, coin-type or similar or pouch-type or similar according to the shape of the rechargeable lithium battery, and / or can be classified into body-type or similar or thin-film-type or similar according to the size of the rechargeable lithium battery. The structure and manufacture of such batteries are well known in the relevant art and are therefore not described in further detail.

[0172] Rechargeable lithium batteries may be classified according to their shapes into cylindrical batteries, prismatic batteries, pouch batteries, and / or coin-type or -like batteries, etc. Figures 1 to 4 are schematic diagrams each showing a rechargeable lithium battery according to one or more embodiments. Figure 1 A cylindrical battery is shown, Figure 2 A prismatic cell is shown, and Figure 3 and Figure 4 Each shows a pouch type or similar battery. Figures 1 to 4 , the rechargeable lithium battery 100 may include an electrode assembly 40 and a case 50, the electrode assembly 40 including a separator 30 between a positive electrode 10 and a negative electrode 20, and the electrode assembly 40 is included in the case 50. The positive electrode 10, the negative electrode 20, and the separator 30 may be impregnated with an electrolyte. Figure 1 As shown in , the rechargeable lithium battery 100 may include a sealing member 60 that seals the housing 50. Figure 2 In the embodiment, the rechargeable lithium battery 100 may include a positive electrode lead tab 11, a positive electrode terminal 12, a negative electrode lead tab 21, and a negative electrode terminal 22. Figure 3 and Figure 4 As shown in , the rechargeable lithium battery 100 may include an electrode tab 70 serving as an electrical path for guiding current formed in the electrode assembly 40 to the outside, and the electrode tab 70 may be, for example, a positive electrode tab 71 or a negative electrode tab 72 .

[0173] Hereinafter, examples and comparative examples of the present disclosure are described. However, these examples are not to be construed as limiting the scope of the present disclosure in any sense.

[0174] Example 1

[0175] 98 wt % of an artificial graphite negative electrode active material, 1 wt % of styrene-butadiene rubber, and 1 wt % of carboxymethyl cellulose were mixed in a water solvent to prepare a negative electrode active material layer slurry.

[0176] Under conventional techniques in the art, a negative electrode active material layer slurry is coated on a Cu current collector, dried, and pressed to prepare a negative electrode.

[0177] 96wt% LiNi 0.8Co 0.1 Al 0.1 O 2 The positive electrode active material, 2 wt % of polyvinylidene fluoride, and 2 wt % of Ketjen black were mixed in an N-methylpyrrolidone solvent to prepare a positive electrode active material layer slurry.

[0178] Using conventional techniques in the art, the positive electrode active material layer slurry is coated on an Al current collector, dried and pressed to prepare a positive electrode.

[0179] Preparation of polyethylene / polypropylene double-layer separators.

[0180] An electrode assembly of a negative electrode, a separator, and a positive electrode is prepared.

[0181] 95 wt % of iron (II) phthalocyanine represented by Chemical Formula 10b and 5 wt % of a polyvinylidene fluoride binder were dispersed in an N-methylpyrrolidone solvent to prepare a gas capture layer composition.

[0182] Chemical formula 10b

[0183]

[0184] The gas capture layer composition was sprayed onto an aluminum metal can battery casing for prismatic cells to provide a 200 μm thick gas capture layer in the aluminum metal can battery casing.

[0185] Thereafter, the electrode assembly was inserted into an aluminum metal can battery case, and an electrolyte was injected therein, thereby manufacturing a 150 Ah prismatic battery.

[0186] By adding 1.5M LiPF 6 The electrolyte was prepared by dissolving in ethylene carbonate, ethyl methyl carbonate and dimethyl carbonate (volume ratio of 20:20:40).

[0187] Example 2

[0188] A 150 Ah prismatic battery was manufactured in substantially the same procedure as in Example 1, except that iron (III) phthalocyanine chloride represented by Chemical Formula 10c was used instead of iron (II) phthalocyanine to prepare the gas capture layer composition.

[0189] Chemical formula 10c

[0190]

[0191] Example 3

[0192] A 150 Ah prismatic battery was manufactured in substantially the same procedure as in Example 1, except that hemoglobin iron (II) represented by Chemical Formula 30a was used instead of phthalocyanine iron (II) to prepare the gas capture layer composition.

[0193] Chemical formula 30a

[0194]

[0195] Example 4

[0196] A 150 Ah prismatic battery was manufactured in substantially the same procedure as in Example 1, except that myoglobin iron (II) represented by Chemical Formula 30b was used instead of phthalocyanine iron (II) to prepare the gas capture layer composition.

[0197] Chemical formula 30b

[0198]

[0199] Example 5

[0200] A 5 Ah cylindrical battery was manufactured in substantially the same procedure as in Example 1, except that an aluminum metal can battery case for cylindrical batteries was used as the battery case.

[0201] Example 6

[0202] A 5 Ah cylindrical battery was manufactured in substantially the same procedure as in Example 2, except that an aluminum metal can battery case for cylindrical batteries was used as the battery case.

[0203] Example 7

[0204] A 5 Ah cylindrical battery was manufactured in substantially the same procedure as in Example 3, except that an aluminum metal can battery case for cylindrical batteries was used as the battery case.

[0205] Example 8

[0206] A 5 Ah cylindrical battery was manufactured in substantially the same procedure as in Example 4, except that an aluminum metal can battery case for cylindrical batteries was used as the battery case.

[0207] Example 9

[0208] A 4.5 Ah pouch cell was manufactured in substantially the same process as that in Example 1, except that an aluminum metal laminate sheet battery case for pouch cells was used as a battery case.

[0209] Example 10

[0210] A 4.5 Ah pouch cell was manufactured in substantially the same process as that in Example 2, except that an aluminum metal laminate sheet battery case for pouch cells was used as a battery case.

[0211] Example 11

[0212] A 4.5 Ah pouch cell was fabricated in substantially the same process as in Example 3, except that an aluminum metal laminated sheet cell case for a pouch cell was used as the cell case.

[0213] Example 12

[0214] A 4.5 Ah pouch cell was fabricated in substantially the same process as in Example 4, except that an aluminum metal laminated sheet cell case for a pouch cell was used as the cell case.

[0215] Comparative Example 1

[0216] 98 wt% of artificial graphite negative electrode active material, 1 wt% of styrene-butadiene rubber, and 1 wt% of carboxymethyl cellulose were mixed in an aqueous solvent to prepare a negative electrode active material layer slurry.

[0217] Using conventional techniques in the art, the negative electrode active material layer slurry was coated on a Cu current collector, dried, and pressed to prepare a negative electrode.

[0218] 96 wt% of LiNi 0.8 Co 0.1 Al 0.1 O 2 positive electrode active material, 2 wt% of polyvinylidene fluoride, and 2 wt% of Ketjen black were mixed in an N-methylpyrrolidone solvent to prepare a positive electrode active material layer slurry.

[0219] Using conventional techniques in the art, the positive electrode active material layer slurry was coated on an Al current collector, dried, and pressed to prepare a positive electrode.

[0220] A polyethylene / polypropylene double-layer separator was prepared.

[0221] An electrode assembly of a negative electrode, a separator, and a positive electrode was prepared.

[0222] The electrode assembly was inserted into an aluminum metal can cell case for a prismatic cell, and an electrolyte was injected therein to fabricate a 150 Ah prismatic cell. The electrolyte was prepared by dissolving 1.5 M of LiPF 6 in ethylene carbonate, ethyl methyl carbonate, and dimethyl carbonate (volume ratio 20:20:40).

[0223] Comparative Example 2

[0224] A 5 Ah cylindrical cell was fabricated in substantially the same process as in Comparative Example 1, except that the electrode assembly was inserted into an aluminum metal can cell case for a cylindrical cell.

[0225] Comparative Example 3

[0226] A 4.5 Ah pouch cell was manufactured in substantially the same process as that in Comparative Example 1, except that the electrode assembly was inserted into an aluminum metal laminate sheet battery case for a pouch cell.

[0227] Experimental Example 1) Evaluation of gas partial pressure

[0228] The batteries according to Examples 1 to 12 and Comparative Examples 1 to 3 were each exposed to 140° C. for 1 hour, and then CO was measured by electrochemical mass analysis (differential electrochemical mass spectrometry, DEMS). 2 Gas generation. Through this measurement, CO 2 Maximum partial pressure / 10 -8 The results (eg, values) of mbar are shown in Table 1.

[0229] The batteries according to Examples 1 to 12 and Comparative Examples 1 to 3 were each overcharged to 6 V at 1 C for 5 hours, and then each was measured. 2 Gas generation. Through this measurement, O 2 Maximum partial pressure / 10 -8 The results (eg, values) of mbar are shown in Table 1.

[0230] Table 1

[0231] <![CDATA[CO 2 Maximum partial pressure / 10 -8 mbar]]> <![CDATA[O 2 Maximum partial pressure / 10 -8 mbar<!-- 20 --> ]]> Comparative Example 1 8.79 3.24 Comparative Example 2 3.29 1.31 Comparison Example 3 4.27 0.96 Example 1 0.88 0.46 Example 2 0.73 0.51 Example 3 1.25 0.69 Example 4 1.32 0.59 Example 5 0.59 0.21 Example 6 0.61 0.27 Example 7 0.81 0.34 Example 8 0.87 0.39 Example 9 0.96 0.33 Example 10 0.99 0.37 Example 11 1.18 0.46 Example 12 1.06 0.45

[0232] As shown in Table 1, each of the batteries of Examples 1 to 12 in which a gas capture layer was formed between the electrode assembly and the battery case exhibited surprisingly reduced gas generation during high temperature exposure compared to Comparative Examples 1 to Comparative Examples 3, all of which had no gas capture layer.

[0233] In the present disclosure, the terms "includes", "comprising" or "having" and variations thereof are intended to indicate the presence of executed features, numbers, steps, constituent elements or combinations thereof, but it should be understood that the possibility of the prior existence or addition of one or more other features, numbers, steps, constituent elements or combinations thereof is not excluded.

[0234] In the present disclosure, "not including one or any 'component'", "excluding one or any 'component'" and / or "not containing 'component'" etc. means that the "component" is not added, selected or used as a component in the composition, but due to other impurities and / or external factors, the "component" may still be included in less than an appropriate amount.

[0235] As used herein, the terms "substantially", "approximately" and similar terms are used as approximate terms rather than as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that will be recognized by those of ordinary skill in the art. As used herein, "approximately" or "approximately" also include the stated values ​​and mean: within the acceptable deviation range of the particular value as determined by those of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "approximately" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0236] Any numerical range described herein is intended to include all subranges of the same numerical precision contained in the described range. For example, the range "1.0 to 10.0" is intended to include all subranges between the described minimum value 1.0 and the described maximum value 10.0 (and including the described minimum value 1.0 and the described maximum value 10.0), that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical limit described herein is intended to include all lower numerical limits contained therein, and any minimum numerical limit described in this specification is intended to include all higher numerical limits contained therein. Therefore, the applicant reserves the right to amend this specification (including the claims) to explicitly describe any subranges contained in the range explicitly described herein.

[0237] The battery management system (BMS) device and / or any other related device or component according to the embodiments of the present invention described herein can be implemented using any suitable hardware, firmware (e.g., a dedicated integrated circuit), software, or a combination of software, firmware, and hardware. For example, the various components of the device can be formed on an integrated circuit (IC) chip or on separate IC chips. In addition, the various components of the device can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of the device can be processes or threads that run on one or more processors in one or more computing devices, execute computer program instructions, and interact with other system components to perform various functions described herein. The computer program instructions are stored in a memory, which can be implemented in a computing device using a standard memory device (such as a random access memory (RAM) as an example). The computer program instructions can also be stored in other non-temporary computer-readable media (such as a CD-ROM, a flash drive, etc. as an example). In addition, those skilled in the art should recognize that without departing from the scope of the present disclosure, the functions of various computing devices can be combined or integrated into a single computing device, or the functions of a particular computing device can be distributed across one or more other computing devices.

[0238] Although the present disclosure has been described in conjunction with what are currently considered to be practical example embodiments, it will be understood that the present disclosure is not limited to the disclosed embodiments, but on the contrary, is intended to cover one or more suitable modifications and equivalent arrangements included within the spirit and scope of the appended claims and their equivalents. Therefore, the above-described embodiments should be understood as examples and do not limit the present disclosure in any way.

Claims

1. A rechargeable lithium battery, comprising: Electrode assembly; A battery housing, accommodating the electrode assembly; as well as a gas capture layer between the electrode assembly and the battery case, Wherein, the gas capture layer includes a compound represented by one selected from Chemical Formula 1 to Chemical Formula 4: Chemical formula 1 Chemical formula 2 Chemical formula 3 Chemical formula 4 In Chemical Formulae 1 to 4, M is Fe, Li, Mg, Mn, Co, Ni, Cu, Zn, Pb, Pd, TiO, VO, FeCl, FeO, BCl, AlCl, MnCl, GaCl, InCl, SiR 65 R 66 or Ru(CO), X is 1, 2, or 3, y is 1 or 2, and R1 to R 66 are the same or different and are independently H, alkyl, alkenyl, COOH, R 67 -COOH, benzyl, CHO, COCH3, COOCH3, CN, OH, OCH3, NH2, NHCH3, NH2CH3, N(CH3)2, NO2, SO3H or halogen, wherein R 67 It is an alkylene group.

2. The rechargeable lithium battery according to claim 1, wherein The compound is represented by one selected from Chemical Formula 1a to Chemical Formula 1s: Chemical formula 1a Chemical formula 1b Chemical formula 1c Chemical formula 1d Chemical formula 1e Chemical formula 1f Chemical formula 1g Chemical formula 1h Chemical formula 1i Chemical formula 1j Chemical formula 1k Chemical formula 1l Chemical formula 1m Chemical formula 1n Chemical formula 1o Chemical formula 1p Chemical formula 1q Chemical formula 1r Chemical formula 1s 3. The rechargeable lithium battery according to claim 1, wherein M is Fe, x is 2 or 3, and y is 1.

4. The rechargeable lithium battery according to claim 1, wherein The compound includes iron phthalocyanine, iron phthalocyanine chloride, hemoglobin iron, myoglobin iron, or a combination thereof.

5. The rechargeable lithium battery according to claim 1, wherein The gas capture layer has a thickness of 10 μm or more.

6. The rechargeable lithium battery according to claim 5, wherein: The gas capture layer has a thickness of 10 μm to 600 μm.

7. The rechargeable lithium battery according to claim 1, wherein: The amount of the compound is 5 wt % to 99 wt % based on 100 wt % of the total weight of the gas capture layer.

8. The rechargeable lithium battery according to claim 1, wherein: The gas capture layer also includes a binder.

9. The rechargeable lithium battery according to claim 8, wherein: The amount of the binder is about 1 wt % to about 95 wt % based on 100 wt % of the total weight of the gas capture layer.

10. The rechargeable lithium battery according to claim 1, wherein: The gas capture layer is on the battery housing.

11. The rechargeable lithium battery according to claim 1, wherein: The rechargeable lithium battery further includes an insulating tape between the electrode assembly and the battery case, and The gas capture layer is on the insulating tape and between the insulating tape and the battery case or between the electrode assembly and the insulating tape.

12. The rechargeable lithium battery according to claim 1, wherein: The rechargeable lithium battery further includes an insulating tape around the electrode assembly, and The gas capture layer is between the insulating tape and the battery case or between the electrode assembly and the insulating tape.

13. The rechargeable lithium battery according to claim 1, wherein: The rechargeable lithium battery also includes a finishing tape around the electrode assembly, and The gas capture layer is between the finishing tape and the battery casing.

14. The rechargeable lithium battery according to claim 1, wherein: The rechargeable lithium battery also includes a finishing tape around the electrode assembly, and The gas capture layer is between the electrode assembly and the finishing belt.

15. The rechargeable lithium battery according to claim 1, wherein: The electrode assembly includes a negative electrode, a separator, and a positive electrode.

16. The rechargeable lithium battery according to claim 1, wherein: The rechargeable lithium battery includes a pouch cell, a can cell, or a combination thereof.

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