328results about "Bipolar electrodes" patented technology

A power system including at least a lithium-sulfur (Li—S) battery module or pack and a second battery module or pack, different than the Li—S module or pack in composition, structure, or configuration, wherein (i) at least one of the Li—S module or pack and the second battery module or pack includes a first set of multiple bipolar electrodes internally connected in series; and (ii) the at least a lithium-sulfur (Li—S) battery module or pack and the second battery module or pack are internally or externally connected in parallel to form a power source. The power source May be connected in parallel to a supercapacitor, a fuel cell, a high-power battery, etc. The power system may further contain a controller, a DC / DC converter and / or a high-voltage bus electrically communicating with the controller. The power system may be used to power a vehicle or other device.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a dry battery pole piece, a preparation method thereof and a battery comprising the pole piece, and the method comprises the following steps: S1, preparing a composite current collector; s2, preparing an electrode film: S21, preparing a positive electrode film, and S22, preparing a negative electrode film; s3, preparing a pole piece green body: sequentially laminating the positive electrode film, the composite current collector and the negative electrode film, and carrying out gradient pressure rolling at 120-180 DEG C, linearly increasing the pressure from 5-10MPa at the edge to 15-20MPa at the center, and controlling the rolling speed to be 1-3m / min, so as to form the pole piece green body; and S4, preparing the dry-method battery pole piece. The composite current collector adopts a three-layer substrate structure of a metal substrate layer, mesoporous carbon, an MOF composite transition layer and a conductive polymer transition layer, gradient pores are formed through laser drilling, and an AlO nano coating is deposited to enhance interface bonding.

The electrode for a secondary battery according to an embodiment of the present disclosure includes: an electrode current collector; electrode mixture layers on both surfaces of the electrode current collector; and insulating layers on both surfaces of the electrode current collector, wherein the electrode for a secondary battery has an α value of 0 to 1 according to Equation 1 below. [Equation 1] In Equation 1 above, α is a foil curl parameter, TAis the thickness value in micrometers (μm) of the insulating layer on one surface of the current collector, TB is the thickness value in micrometers (μm) of the insulating layer on the other surface of the current collector, and W is the width value in millimeters (mm) of the insulating layer. According to an embodiment of the present disclosure, it is possible to alleviate problems caused by foil curl in an electrode for a secondary battery.

Achieves both rate characteristics and durability. [Solution] A positive electrode active material includes primary particles and a coating, the primary particles include an olivine-type phosphate compound, the coating covers at least a portion of the surface of the primary particles, and the coating includes carbon and phosphorus.

The invention discloses a lithium-carbon composite material as well as a preparation method and application thereof. According to the lithium-carbon composite material, metal lithium powder and / or lithium alloy powder are / is used as an inner core, a single-wall carbon nanotube and a multi-wall carbon nanotube are jointly used as an outer shell, and the lithium-carbon composite material of a core-shell structure is constructed. The flexibility of the single-walled carbon nanotubes and the rigidity of the multi-walled carbon nanotubes are utilized to construct a rigid-flexible stable shell, so that the problem of volume expansion of metal lithium in the charging and discharging process is relieved; besides, the shell can conduct electrons and ions at the same time and synchronously regulate and control lithium ion transmission and current density, so that the problem of non-uniform deposition of metal lithium is effectively solved, and growth of lithium dendrites is avoided, thereby improving the safety and service life of the battery.

An active material of the positive electrode comprises secondary particles (2). Each of the secondary particles (2) comprises primary particles (1). Each of the primary particles (1) comprises an olivine-type phosphate compound. A portion of the surface of the secondary particle (2) has a depression (3). At the depression (3), the surface of the secondary particle (2) is concave. A cross-section of the secondary particle (2) satisfies the relationship "0.41 ≤ Sa / Ca ≤ 0.95". "Sa" represents the area of ​​the cross-section of the secondary particle (2). "Ca" represents the area of ​​the smallest circumcircle of the cross-section of the secondary particle (2).

The invention relates to a positive active material, an electrode and a battery. An object of the present disclosure is to improve magnification characteristics. A positive electrode active material includes a powder. The powder includes a plurality of secondary particles. Each of the plurality of secondary particles includes a plurality of primary particles. Each of the plurality of primary particles contains an olivine-type phosphate compound. Carbon adheres to at least part of the surface of the primary particles. In at least some of the plurality of secondary particles, linearly extending grooves are formed in the surfaces of the secondary particles.

Disclosed is a bipolar electrode including a current collector including a polymer film and conductive layer added to at least a part of each of an outer surface and an inner surface of the polymer film, a positive electrode formed on a first surface of the current collector, and a negative electrode formed on a second surface of the current collector, wherein the current collector including the polymer film is thermally fused so as to be sealed, whereby migration of an electrolyte between unit electrodes is prevented.

The invention discloses a high-performance electrode, a preparation method thereof and a solid-state battery. The high-performance electrode comprises a positive electrode, a current collector and a negative electrode, and the current collector is located between the positive electrode and the negative electrode; the negative electrode comprises a metal lithium composite material layer, and the metal lithium composite material layer comprises a granular metal lithium composite material or a pressure-deformed granular metal lithium composite material. The metal lithium composite material comprises: a lithium-containing core; the middle layer is constructed on the surface of the inner core and comprises a first framework formed by interweaving a first framework material, a second framework formed by a second framework material inserted into the first framework, and a limiting polymer for fixing the relative positions of the first framework and the second framework; and a housing comprising a conductive polymer layer and a lithium fast ion conductor distributed in the conductive polymer layer. The high-performance electrode has excellent cycle performance and high safety characteristics.

A method for manufacturing a battery includes conveying a heated bipolar electrode stack in the form of an elongated sheet by a conveyor roller. In the method of the present disclosure, a first electrode active material layer includes a plurality of island portions extending in a conveying direction, and at least one gap extending in the conveying direction is present between the island portions. A temperature drop of the bipolar electrode stack as the bipolar electrode stack passes over the conveyor roller is 30° C. or more. The conveyor roller includes a recess positioned to overlap with the gap or the opposite side of the bipolar electrode stack from the gap such that at least part of the gap or the opposite side of the bipolar electrode stack from the gap does not contact the conveyor roller.

According to an embodiments of the present disclosure, provided is a bipolar unit cell comprising: a laminate which includes a positive electrode current collector, a positive electrode material layer formed on one surface of the positive electrode current collector, a negative electrode current collector, a negative electrode material layer formed on one surface of the negative electrode current collector, and a separator, and in which the positive electrode material layer and the negative electrode material layer are stacked so as to face each other while interposing a separator between them, and a sealing portion that is attached form the other surface of the positive current collector to the other surface of the negative current collector to integrally form the laminate and seal the inside, wherein a conductive layer is formed on the outside of at least one of the positive electrode current collector and the negative electrode current collector, and a bipolar battery having a structure in which two or more of the bipolar unit cells are stacked.

Disclosed is a novel active material operatable in an aqueous battery. The aqueous battery of the present disclosure includes a positive electrode, an aqueous electrolyte solution and a negative electrode. The positive electrode includes a positive electrode active material, and the negative electrode includes a negative electrode active material. One of or both the positive electrode active material and the negative electrode active material include(s) a composite oxide. The composite oxide contains Na, at least one transition metal element of Fe, Ti, Ni and Mn, and O. The aqueous electrolyte solution contains water and potassium polyphosphate dissolved in the water.

A static battery with a non-conductive elastomeric or thermoplastic housing. The battery-housing is adapted to receive at least one anode assembly, at least one cathode assembly, and at least one bipolar electrode assembly. At least the bipolar electrode assembly is formed from a conductive plastic resin that is formed as a CPE sheet. A carbon material is affixed to the CPE sheet to form the bipolar electrode. The at least one cathode assembly, the at least one anode assembly and the at least one bipolar electrode assembly are received into the battery box such that a liquid and / or gas seal is formed between electrode assemblies. The battery housing has slots into which the electrode assemblies are received. When the electrode assemblies are received into the housing, cells are formed by the cooperation of the electrode assemblies and the battery housing. The cells are then filled with electrolyte such as zinc bromide and a lid is placed on the battery- box. Once sealed the battery box is a liquid tight container for the battery.

An electrode comprising a current-collecting foil sheet and a positive electrode layer, wherein the positive electrode layer is placed on a surface of the current-collecting foil sheet, the positive electrode layer includes a positive electrode active material, the positive electrode active material includes secondary particles, each of the secondary particles includes primary particles, the secondary particles include pored particles each having a pore, a cross section of the positive electrode layer includes a first region and a second region, the first region and the second region are defined as two equal parts formed by dividing the cross section of the positive electrode layer into half in a thickness direction, the first region is interposed between the current-collecting foil sheet and the second region, and a relationship of 50%≤X is satisfied.

To provide a fluoride ion secondary battery capable of improving initial discharge capacity and capacity retention.SOLUTION: A fluoride ion secondary battery 10 includes: a positive electrode mixture layer 11a; and a positive electrode current collector layer 11b. The positive electrode current collector layer 11b has a modulus of elasticity of 1400 kgf / mm2 or less.SELECTED DRAWING: Figure 1

Provided is a composite substrate for a rechargeable lithium battery that includes a support layer including a polymer film, and a metal layer disposed on the support layer and including at least any one of copper, copper oxide, or a combination thereof, wherein the metal layer includes a first metal layer disposed on a surface of the support layer and including an adhesion enhancer and a first copper, and a second metal layer disposed on the first metal layer and including a second copper, and the adhesion enhancer includes a first moiety chemically bonded to the surface of the support layer and including a hydroxyalkylene group, and a second moiety including an amine group configured to adsorb the first copper.

A composite substrate and a rechargeable lithium battery are disclosed. The composite substrate includes a support layer, a first metal layer on a top surface of the support layer, a second metal layer on a bottom surface of the support layer, and at least one tab embedded between the support layer and at least one of the first metal layer and the second metal layer. The tab includes an embedded portion and an exposed portion.

Reduction of reaction resistance. [Solution] A positive electrode active material comprising secondary particles, wherein the secondary particles comprise a plurality of primary particles and a plurality of titanium bodies, the primary particles comprise a phosphate compound having an olivine-type structure, the titanium bodies comprise titanium oxide having a rutile-type structure, and at least a portion of the plurality of titanium bodies are present on the surface of the primary particles.

A power storage module (1) includes: a pair of electrode plates (10a, 10b); a sealing member (20); a battery element (30); and an insulating member (40). The sealing member (20) is provided between the pair of electrode plates (10a, 10b) to form a space (S1) together with the pair of electrode plates (10a, 10b). The battery element (30) includes a positive electrode active material layer (31) and a negative electrode active material layer (32). The positive electrode active material layer (31) is provided on a surface of one (10a) of the pair of electrode plates in the space (S1). The negative electrode active material layer (32) is provided on a surface of the other (10b) of the pair of electrode plates in the space (S1). The insulating member (40) is positioned between the pair of electrode plates (10a, 10b), the insulating member (40) being provided on a side opposite to the space (S1) when viewed from the sealing member (20). A melting point of the insulating member (40) is lower than a melting point of the sealing member (20).

The present disclosure relates to a secondary battery, and more particularly, to a structure of a secondary battery module in which multiple cells are stacked. In the secondary battery module, at least two voltage detection terminals are provided for each of the current collector foils. As a result, even when one of the voltage detection terminals is damaged, a state in which detection of the voltage and the inflow and outflow of current for each cell such as discharge inactivation are enabled is maintained, and the balancing processing time can be shortened.

The invention relates to an aqueous battery. Disclosed is a novel active material capable of operating in an aqueous battery. This aqueous battery has a positive electrode, an aqueous electrolyte solution, and a negative electrode. The positive electrode contains a positive electrode active material, and the negative electrode contains a negative electrode active material. One or both of the positive electrode active material and the negative electrode active material include a composite oxide. The composite oxide comprises Na; a transition metal element selected from at least one of Fe, Ti, Ni and Mn; and O. The aqueous electrolyte solution contains water and potassium polyphosphate dissolved in the water.

The invention provides a power storage module and a method for detaching the power storage module, wherein the power storage module can be easily detached while suppressing the increase of steps during recycling and the like. A power storage module is provided with bipolar electrodes provided with a positive electrode active material on one surface of a current collector foil and a negative electrode active material on the other surface of the current collector foil, an electrode laminate in which a plurality of bipolar electrodes are laminated, and a resin sealing part provided at the peripheral edge of the current collector foil, and a sealing portion that seals between the bipolar electrodes adjacent to each other in the lamination direction of the electrode laminate, the sealing portion having a recessed portion that forms a gap between the peripheral edge portions of the collector foils adjacent to each other in the lamination direction.

This electrode comprises a current collector, and a positive electrode active material layer (102) formed on the surface of the current collector. The surface area of the positive electrode active material layer (102) is at least 1 m2. The positive electrode active material layer (102) comprises a main surface positioned on the side opposite from the surface facing the current collector, and groove sections (103) opened to the main surface. In a plan view of the main surface, the maximum distance D, which is the maximum value of a specific distance, is 60 mm or less. The specific distance is the shorter distance among a distance from an outer peripheral edge of the positive electrode active material layer (102) and a distance from the groove sections (103) at any point in an island part (104), which is a section of the main surface where the groove sections (103) are not provided.

Provided is an electrode composite that may include a current collector including a high-porous region and a low-porous region, and an electrode tab electrically connected to the high-porous region. The high-porous region may be adjacent to the low-porous region in the first direction. The electrode tab may be adjacent to the high-porous region in the first direction. The current collector may have a first length in the first direction. A height of the high-porous region in the first direction may be in a range of about 30% to about 50% of the first length. The low-porous region may be a remaining region other than the high-porous region in the current collector. A porosity of the high-porous region may be greater than a porosity of the low-porous region.

A positive electrode active material includes olivine lithium manganese iron phosphate, wherein the olivine lithium manganese iron phosphate contains a first dopant at a phosphorus site and a second dopant at an oxygen site, the first dopant has a valence of +4 and a coordination number of 4 at the phosphorus site, and the second dopant has a valence of −1 at the oxygen site.

A production device 41 is equipped with: fluid injection nozzles 43 which are pressed against areas surrounding the openings 31A of through-holes 31 in a side surface 23c of a sealed object 3 and inject a fluid F into a plurality of inner spaces S via the through-holes 31; a first restraining member 44, which restrains a first region F1 of the sealed object 3 where the plurality of through-holes 31 have been disposed; and a second restraining member 45, which has been disposed independently of the first restraining member 44 and restrains a second region F2 including the inner spaces S, along the stacking direction.

Disclosed are composite substrates, and rechargeable lithium batteries including the composite substrates. A composite substrate includes a support layer, a first metal layer on a top surface of the support layer, and a second metal layer on a bottom surface of the support layer. The support layer includes a first polymer and a second polymer that are different from each other. A tensile strength of the second polymer is greater than a tensile strength of the first polymer. An elongation of the first polymer is greater than an elongation of the second polymer.

A positive electrode active material comprises secondary particles, wherein each of the secondary particles includes primary particles, and each of the primary particles includes an olivine-type phosphate compound and lithium zirconate.

A bipolar stack unit cell structure includes: a bicell in which a first anode current collector, a first anode active material layer, a first electrolyte layer, a first cathode active material layer, a cathode current collector, a second cathode active material layer, a second electrolyte layer, a second anode active material layer, and a second anode current collector are sequentially arranged, wherein a plurality of the bicells are stacked, and a compression pad is provided between the first anode current collector and the second anode current collector of adjacent bicells of the plurality of bicells. The bipolar stack unit cell structure absorbs a volume change of an anode and suppresses or reduces a volume change of the entire cell to obtain a stable (or suitable) lifespan, and the capacity and voltage thereof can be freely (or suitably) designed by bipolar connection of the unit cells.