1914 results about "Aqueous electrolyte" patented technology

The invention provides a non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack and a power utilization device, the non-aqueous electrolyte comprises a lithium salt, an organic solvent and an electrolyte additive, and the electrolyte additive comprises 1, 3-propane sultone, fluoroethylene carbonate, vinylene carbonate, lithium tetrafluoroborate and a compound I shown in the formula I. The non-aqueous electrolyte is applied to the lithium ion battery, and the cycle life of the lithium ion battery is prolonged.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a low-temperature aqueous electrolyte for anchoring I < + > ions based on a double-coordination structure and a low-temperature four-electron aqueous zinc-iodine battery. The low-temperature aqueous electrolyte is a mixed solution of a zinc salt, an electrolyte additive and water, and the low-temperature aqueous electrolyte comprises 2-5 mol / L of the zinc salt and 0.3-0.6 mol / L of the electrolyte additive; the zinc salt is zinc perchlorate or zinc tetrafluoroborate. The low-temperature four-electron aqueous zinc-iodine battery comprises the low-temperature aqueous electrolyte. Compared with the prior art, the invention at least has the following beneficial effects: (1) the corrosion risk caused by chloride ion concentration is reduced; (2) efficient four-electron iodine positive electrode reaction is realized; and (3) obtaining the low-temperature four-electron aqueous zinc-iodine battery.

The invention discloses a non-aqueous electrolyte and a lithium ion battery containing the non-aqueous electrolyte. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, wherein the additive comprises a benzenesulfonyl fluoride compound as shown in a structural formula I and a carbonate bisulfate compound as shown in a structural formula II. According to the non-aqueous electrolyte disclosed by the invention, the benzenesulfonyl fluoride compound and the polyol carbonate bisulfate compound are used as additives, and the benzenesulfonyl fluoride compound and the polyol carbonate bisulfate compound are matched for use, so that the ion transmission rate can be increased, the high-temperature cycle performance of the lithium ion battery is improved, the internal resistance is reduced, and the high-temperature storage performance of the lithium ion battery is improved. # imgabs0 #

The present invention discloses a non-aqueous electrolyte for a secondary battery and a secondary battery thereof, the electrolyte comprises an electrolyte salt, a non-aqueous solvent and an additive, the additive at least comprises: a nitrogen-containing heterocyclic compound as a first additive, a film-forming additive with a film-forming potential of less than 1.5 V (vs. Li + / Li) as a second additive, the specific structure of the additive is shown in the specification. The nitrogen-containing heterocyclic compound and the film-forming additive with the film-forming potential lower than 1.5 V (vs.Li < + > / Li) are combined for use, and the nitrogen-containing heterocyclic compound and the film-forming additive are regulated in a specific content ratio range to fully generate a synergistic effect, so that water catching and acid inhibition can be effectively realized, decomposition and gas production can be effectively inhibited at high temperature and high voltage, the stability of the electrolyte is greatly improved, and the service life of the electrolyte is prolonged. And an SEI film with excellent ion transmission capability and structure / thermal stability can be formed on the surface of the electrode, so that the first efficiency of the battery is effectively improved, and the low-temperature performance and the cycle performance of the battery are further improved.

The invention belongs to the technical field of thermoelectricity, and relates to a preparation method and application of a quasi-solid thermoelectric material capable of realizing humidity stability by means of phase separation regulation, the preparation method comprises the following steps: dissolving a negatively charged hydrophilic monomer, an electrically neutral monomer, a cross-linking agent and a photoinitiator in a solvent to obtain a precursor solution, and carrying out an ultraviolet polymerization reaction to form polyelectrolyte gel; mixing the eutectic solvent with an electrolyte aqueous solution containing redox ion pairs and lithium chloride to obtain a quaternary electrolyte system; and immersing the gel into a quaternary electrolyte system, and fully replacing the internal solution through a diffusion effect to obtain the quasi-solid thermoelectric material with stable humidity. The thermoelectric material has the advantages of excellent Seebeck coefficient, good stability, high mechanical strength, large power density and the like, can supply power to wearable electronic products in an actual humidity fluctuation environment, breaks through the main bottleneck of actual application of quasi-solid ionic thermoelectric materials based on ionized water gel, and is wide in application prospect.

The invention provides a non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack and an electric device. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and a functional additive, and the functional additive comprises a bis-sulfinyl ester structure as shown in a formula I in the specification. When the non-aqueous electrolyte is used in the lithium ion battery, the wettability of the electrolyte can be effectively enhanced, the ionic conductivity of the electrolyte is improved, the low-temperature discharge capacity of the electrolyte is improved, and the stability of the electrolyte under high-temperature and high-voltage conditions is improved; and thus, the discharge capability and the service life of the lithium ion battery in high-temperature storage and high-temperature circulation are improved.

The invention discloses an interface corrosion resistant aqueous electrolyte and a battery application thereof. The aqueous electrolyte comprises a zwitterionic additive; the zwitterionic additive comprises an imidazolium cation part and a sulfonate anion part; wherein a 1-site N atom in imidazolium is connected with a sulfonate radical through a C1-6 saturated alkyl carbon chain, and a 3-site N atom in imidazolium is connected with a C2-4 unsaturated alkyl carbon chain or a C1-4 saturated alkyl carbon chain. The aqueous electrolyte can effectively relieve the interface corrosion problem of the aqueous battery, so that the cycle stability of the negative electrode is improved, and the preparation of the long-cycle aqueous battery is realized.

The invention relates to the technical field of sodium-ion batteries, in particular to a sodium-ion battery non-aqueous electrolyte, a sodium-ion battery, a battery module, a battery pack and a power utilization device.The sodium-ion battery non-aqueous electrolyte comprises sodium salt, an organic solvent and a functional additive, the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate, and the organic solvent comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate. The molar ratio of the sodium bis (fluorosulfonyl) imide to the sodium hexafluorophosphate is (8: 2)-(7: 3); the organic solvent is prepared from chain carbonate and cyclic carbonate, and the functional additive is prepared from 2-trifluoromethyl-1, 3-propene sultone and 1-fluoro-2-methyl-ethylene carbonate. According to the invention, the ionic conductivity and thermal stability of the sodium-ion battery electrolyte can be improved through reasonable proportioning and use of the double-ion sodium salt, and meanwhile, corrosion of sodium bis (fluorosulfonyl) imide to an aluminum structural part can also be avoided. The sodium salt and the functional additive cooperate with each other to form an effective interface film on the surface of the electrode, so that the high-temperature storage performance and the high-temperature cycle performance of the sodium ion battery can be remarkably improved.

A positive electrode mixture layer in this secondary battery contains a first positive electrode active material having a particle fracture strength of 90 MPa or less and a second positive electrode active material having a particle fracture strength of 110 MPa or greater. The first positive electrode active material is a lithium transition metal complex oxide that contains Ni and Mn, and has a Co content ratio of 1 mol % or less. The second positive electrode active material is a lithium transition metal complex oxide that contains Ni and Co, and has a Co content ratio of 3 mol % or greater. Regarding the positive electrode mixture layer, the content of the first positive active material is at least 5 mass % but less than 50 mass % with respect to the combined mass of the first positive electrode active material and the second positive electrode active material.

The invention belongs to the technical field of new energy batteries, and relates to a lithium ion battery. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, wherein the negative plate comprises a negative current collector and a negative material layer arranged on the negative current collector; the negative electrode current collector is a copper foil or a composite copper foil, and the negative electrode material layer comprises a silicon-containing material; the non-aqueous electrolyte comprises a non-aqueous organic solvent, a lithium salt, a first additive and a second additive; the first additive is 1, 3, 6-hexane trinitrile; the second additive comprises a compound as shown in a structural formula 1; the lithium ion battery satisfies the following conditions: 0.1 < = 10 (d + c) * a / b < = 100, 8 < = a < = 30, 20 < = b < = 800, 0.5 < = c < = 4, and 0.1 < = d < = 4. According to the lithium ion battery provided by the invention, the silicon negative electrode is stable in structure, high in energy density and stable in cycle performance.

Provided are a non-aqueous electrolyte solution and a non-aqueous electrolyte solution battery which are capable of improving low-temperature (-30 DEG C) output characteristics (post-high-temperature storage resistance) after a high-temperature (70 DEG C) storage test and a post-overdischarge capacity retention rate after the high-temperature (70 DEG C) storage test in a well-balanced manner. A non-aqueous electrolyte solution containing: (I-1) a compound represented by general formula [1a] described in the description; and (I-2) at least one compound selected from the group consisting of a compound represented by general formula [1b] and a compound represented by general formula [1b '], and the content of (I-2) in the non-aqueous electrolyte solution is 10-25000 ppm by mass.

This invention relates to a biomass-based gel electrolyte membrane, its preparation method, and its application. The method includes preparing regenerated cellulose using a sol-gel method, adding sodium alginate and zinc chloride solution, and rapidly constructing a biomass-based composite gel electrolyte with a dual-network structure through metal ion coordination crosslinking. The biomass-based gel electrolyte membrane is obtained by adsorbing an aqueous electrolyte onto a gel membrane with a dual-network structure. This gel electrolyte membrane is then assembled with a zinc anode and a vanadium pentoxide cathode to obtain a zinc-ion battery. This invention features a simple method, readily available and inexpensive raw materials, easy product molding, convenient operation and control, and is conducive to industrial production. The prepared composite gel electrolyte membrane has a dual-network structure, exhibiting good stability, liquid retention capacity, and ionic conductivity, and demonstrates excellent cycle capacity and lifespan when applied to aqueous zinc-ion batteries.

The invention aims at providing an electrochromic device based on ammonium ion aqueous electrolyte and a preparation method and application of the electrochromic device, and belongs to the technical field of electrochromic devices. The transparent conductive glass is composed of a transparent conductive glass substrate layer, an ion storage layer, a hydrogel ion electrolyte layer, an electrochromic layer and a top transparent conductive layer. The electrolyte layer of the electrochromic device based on the ammonium ions adopts the hydrogel ion electrolyte, so that the migration process of the ammonium ions can be effectively promoted, and the long-cycle stability of the electrochromic device based on the ammonium ions is improved. The electrochromic device based on ammonium ions has wide application prospects in the fields of intelligent systems, intelligent windows, intelligent electronic products and the like.

The invention provides a secondary battery and an electric device. The secondary battery comprises a negative electrode plate and a non-aqueous electrolyte, the negative electrode plate comprises a negative electrode active material, the volume average particle size Dv50 of the negative electrode active material is 6-20 [mu] m, the non-aqueous electrolyte comprises an additive and a non-aqueous solvent, and the additive comprises a cyclic sulfate compound represented by formula (I); the non-aqueous solvent comprises ethylene carbonate; # imgabs0 #

The invention discloses a high-cycle-performance aqueous battery, which comprises an aqueous electrolyte, a negative electrode, a first positive electrode and a second positive electrode, wherein the first positive electrode and the second positive electrode are positioned on two sides of the negative electrode, and a first diaphragm and a second diaphragm are respectively arranged between the first positive electrode and the negative electrode and between the second positive electrode and the negative electrode; the battery is provided with an electromagnetic valve, the electromagnetic valve is electrically connected with the first positive electrode and the second positive electrode to control switching of the positive electrodes in the charging and discharging loop, and every time discharging and charging circulation are completed, the electromagnetic valve switches the electrode connection relation, and the first positive electrode and the second positive electrode are alternately connected into the charging and discharging loop. Switching of the two positive electrodes in the aqueous battery is accurately controlled through the electromagnetic valve, a positive-negative battery structure is formed in real time, the double positive electrodes alternately perform lithium removal-lithium intercalation reaction, excessive Li intercalation or insufficient positive electrode reduction caused by long-term charging and discharging of a single positive electrode is avoided, the structural stability of the positive electrode material is improved, and the service life of the battery is prolonged. The cycle life and the electrochemical performance stability of the aqueous battery are obviously improved.

Disclosed is a non-aqueous electrolyte secondary battery positive electrode that includes a positive electrode core and a positive electrode mixture layer disposed on the positive electrode core. The positive electrode mixture layer contains a positive electrode active material and carbon nanotubes. The positive electrode active material contains a lithium transition metal composite oxide (I) that either comprises secondary particles that are aggregates of primary particles having an average particle size of 1 μm or greater, or is substantially composed of single particles, the lithium transition metal composite oxide (I) having a volume-based median diameter of 0.6 μm to 6 μm, and a lithium transition metal composite oxide (II) that comprises secondary particles that are aggregates of primary particles having an average particle size of less than 1 μm, the lithium transition metal composite oxide (II) having a volume-based median diameter of 3 μm to 25 μm.

The invention provides a polymer electrolyte, a secondary battery and a preparation method of the polymer electrolyte and the secondary battery. The non-aqueous electrolyte comprises an organic solvent, an electrolyte salt, a borate derivative with the mass fraction of 0.1%-15%, a sulfonyl-containing cross-linking agent A with the mass fraction of 0.1%-4%, a cross-linking agent B at least containing three carbon-carbon double bonds and an initiator, the mass ratio of the cross-linking agent B to the cross-linking agent A is (1-100): 1, the mass fraction of the borate derivative is 0.1%-15%, the mass fraction of the sulfonyl-containing cross-linking agent A is 0.1%-4%, and the mass fraction of the initiator is 0.1%-1%. The mass ratio of the sum of the mass of the borate derivative, the cross-linking agent A and the cross-linking agent B to the mass of the initiator is (1000-20): 1. The polymer electrolyte provided by the invention has high ionic conductivity, can improve the safety performance of a battery in a high proportion state, and can maintain good cycle performance at the same time.

The invention provides a non-aqueous electrolyte and a lithium ion battery containing the same, and belongs to the technical field of lithium ion batteries. The non-aqueous electrolyte comprises electrolyte salt, an organic solvent, a nitrile additive and a compound A; complementary construction of an interfacial film is achieved through the synergistic effect of the nitrile additive and fluorosilane, and decomposition of an electrolyte and corrosion of an electrode material are prevented; a lithium ion conduction path is optimized, and the charging and discharging efficiency of the battery in a high-temperature and high-pressure circulation process is improved; transition metal ion migration is inhibited, and the cycle performance at high temperature and high pressure is improved; gas and by-products generated by thermal decomposition are reduced, so that the volume expansion rate of the battery at high temperature and high pressure is reduced, and stable performance of the battery in a high-temperature cycle process is ensured; the volume expansion rate under high-temperature storage is reduced; and the capacity recovery rate is improved.

According to one embodiment, provided is a carbon dioxide absorption-release device including a pair of electrodes, an aqueous electrolyte, a first electrolyte flow path, and a second electrolyte flow path. Each of the pair of electrodes include a porous composite, where the porous composite contains an electro-conductive component and a porous material on the electro-conductive component, and the porous material includes a reactive moiety for electrochemical proton transfer. In the first electrolyte flow path, one of the pair of electrodes contacts the aqueous electrolyte. In the second electrolyte flow path, the other of the pair of electrodes contacts the aqueous electrolyte.

The invention provides a non-aqueous electrolyte, a secondary battery and an electric device. The non-aqueous electrolyte comprises an additive, the additive comprises a cyclic sulfate compound with a structure as shown in a general formula (I), R1, R2, R3, R4, R5 and R6 are respectively and independently selected from any one of a group with a structure as shown in a general formula (II), a hydrogen atom, a halogen atom, C1-C6 alkyl, C1-C6 halogenated alkyl, C1-C6 alkoxy, C1-C6 halogenated alkoxy, C2-C6 alkenyl, C2-C6 ester group, cyano and sulfonic acid group, and R1, R2, R3, R4, R5 and R6 are respectively and independently selected from any one of hydrogen atom, halogen atom, C1-C6 alkyl, C1-C6 halogenated alkyl, C1-C6 alkoxy, C1-C6 halogenated alkoxy, C2-C6 alkenyl, C2-C6 ester group, cyano and sulfonic acid group. And n1, n2 and n3 are respectively and independently any integer from 0 to 2. The general formula (I) is a general formula (II).

The present invention addresses the problem of providing: a carbon nanotube dispersion paste and a composite paste that have excellent pigment dispersibility and storage stability even at high pigment concentrations; and an electrode layer for a non-aqueous electrolyte secondary battery that has excellent performance (electric conductivity, battery performance, etc.). As the solution, provided is a carbon nanotube dispersion paste for a non-aqueous electrolyte secondary battery that contains at least a dispersion resin (A), carbon nanotubes (B), and a solvent (C), wherein: the dispersion resin (A) contains at least a structural unit (a-1); and the BET specific surface area of the carbon nanotubes (B) is 100 m2 / g to 1000 m2 / g.

The present invention relates to an alkaline electrolysis device comprising: - at least one electrolysis cell comprising a reactor chamber which comprises a hydrogen-side reactor chamber region containing the aqueous electrolyte for decomposing the aqueous electrolyte into gaseous hydrogen and an oxygen-side reactor chamber region containing the aqueous electrolyte for decomposing the aqueous electrolyte into gaseous oxygen; - a hydrogen separator connected to the hydrogen-side reactor chamber region for separating the gaseous hydrogen from the aqueous electrolyte introduced into the hydrogen separator; and - an oxygen separator connected to the oxygen-side reactor chamber region for separating the gaseous oxygen from the aqueous electrolyte introduced into the oxygen separator; wherein the hydrogen separator has a first hydrogen separator outlet for removing the aqueous electrolyte having a first hydrogen concentration and a second hydrogen separator outlet for removing the aqueous electrolyte having a second hydrogen concentration that is less than the first hydrogen concentration; and where the first hydrogen separator outlet and the second hydrogen separator outlet are connectable or connected to the reactor chamber.

The lithium ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the negative electrode comprises a negative electrode active material, the negative electrode active material comprises graphite and an amorphous carbon layer coating the surface of the graphite, the thickness of the amorphous carbon layer is X [mu] m, and the non-aqueous electrolyte comprises a first additive, the first additive comprises a compound A with a structure of a chemical formula 1, R1 and R2 are independently selected from hydrogen, a nitrile group, a carbonyl group, a C1-C12 alkyl group, a C2-C12 alkenyl group, a C2-C12 alkynyl group and a C3-C12 cyclic alkyl group, the mass percent of the compound A in the non-aqueous electrolyte is a%, 0.1 < a < 20, and X and a meet the condition that X / a is more than 1 and less than 10. According to the invention, the compound A is introduced into the non-aqueous electrolyte as an additive, and the fast charge cycle performance of the lithium ion battery can be effectively improved by regulating and controlling the relationship between the thickness of the amorphous carbon layer and the content of the compound A. # imgabs0 #

The invention provides a non-aqueous electrolyte and a lithium ion battery. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive. The additive comprises a compound A as shown in a structural formula I; wherein R1 and R2 are respectively and independently selected from oxygen, sulfur or NR5, R3 and R4 are respectively and independently selected from NR6R7, R5 is C1-C5 alkyl silicon group, and R6 and R7 are respectively and independently selected from C1-C5 alkyl silicon group, C1-C5 alkyl group, substituted C1-C5 alkyl group, phenyl or substituted phenyl. The compound A comprises a cyclic (oxygen, sulfur and nitrogen) phosphamide structure and a trimethylsilyl structure, the trimethylsilyl structure can remove moisture in the electrolyte, and the cyclic (oxygen, sulfur and nitrogen) phosphamide structure is reduced on a negative electrode interface to form a polar solid electrolyte interface film of lithium salt containing oxygen or sulfur and phosphorus and nitrogen; the interfacial film has good lithium ion conductivity and toughness, the charge transfer resistance of the lithium ion battery is reduced, desolvation of lithium ions is promoted, and the high-rate cycle performance of the lithium ion battery is improved. The structural formula I of the # imgabs0 # is shown in the specification.

The invention discloses an organic composite electrode material, a preparation method thereof and a photo-assisted charging ammonium ion battery. The organic composite electrode material is obtained by compounding 2, 6-di [1-(pyrene-3, 4, 9, 10-tetraformyl diimine)] anthraquinone and reduced graphene oxide, and the organic composite electrode material is prepared by compounding the 2, 6-di [1-(pyrene-3, 4, 9, 10-tetraformyl diimine)] anthraquinone and the reduced graphene oxide. According to the invention, the photo-assisted charging strategy and the aqueous ion battery are combined, the ammonium ions are used as the charge carrier of the aqueous photo-assisted charging battery for the first time by virtue of the rapid dynamic characteristic of the ammonium ions in the aqueous electrolyte, and the advantages of rapid ion transmission of the ammonium ions in the electrolyte are utilized; the problem that the photoelectric reaction rate and the electrochemical oxidation reduction rate in the aqueous photo-assisted rechargeable battery are not matched is solved, collaborative optimization of the photoelectric reaction rate and the electrochemical reaction rate is achieved, the charging and discharging efficiency and the energy utilization rate of the battery are remarkably improved, and a new thought is provided for the next generation of photo-storage integrated battery technology.

A method for the electrodeposition of a functional or decorative chromium layer onto a metallic substrate in an electrodeposition process from a halide-ion free and boric acid free aqueous electrolyte solution and to the coated product obtained thereby.

The present application discloses a battery cell and a preparation method therefor, a battery, and an electric device. The battery cell comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte. The electrolyte comprises a first non-aqueous electrolyte solution close to the positive electrode sheet and a second gel electrolyte close to the negative electrode sheet. The first non-aqueous electrolyte solution comprises a first solvent and a first lithium salt, and the first solvent comprises a nitrile-based solvent. The second gel electrolyte comprises a polymer layer and a second non-aqueous electrolyte solution accommodated in the polymer layer. The second non-aqueous electrolyte solution comprises a second solvent and a second lithium salt, and the second solvent comprises a linear monoether solvent. The battery cell has long cycle life and good rate performance.

Provided is a lithium secondary battery including a negative electrode, a positive electrode, a separator, and a non-aqueous electrolyte, in which the negative electrode includes a silicon-based active material, the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, and in which the additive includes a compound represented by Formula 1.

According to the aqueous electrolyte, the preparation method and the aqueous metal ion battery provided by the invention, the zinc salt, the deionized water and the additive are mixed to obtain the electrolyte, and the additive comprises the carbamido-containing organic molecules, so that a double-electric-layer structure on the surface of zinc metal can be changed, an energy barrier in a stripping process can be reduced, and a zinc metal negative electrode can be regulated and controlled to be stripped uniformly; the battery is promoted to show stable cycle performance under high current and high capacity; meanwhile, the electrolyte containing the carbamido organic molecule additive optimizes the surface state of the zinc metal negative electrode and ensures the advantages of high ionic conductivity, low cost and environmental protection of the pure water system electrolyte; besides, the aqueous electrolyte provided by the invention can be applied to the rechargeable aqueous zinc ion battery, realizes long cycle life under high current density and deposition capacity, and has wide application prospects.