574results about "Bipolar electrodes" patented technology

Embodiments described herein relate generally to electrochemical cells having semi-solid electrodes that are coated on only one side of a current collector. In some embodiments, an electrochemical cell includes a semi-solid positive electrode coated on only one side of a positive current collector and a semi-solid negative electrode coated on only one side of a negative current collector. A separator is disposed between the semi-solid positive electrode and the semi-solid negative electrode. At least one of the semi-solid positive electrode and the semi-solid negative electrode can have a thickness of at least about 250 μm.

The invention provides a bipolar battery and an electric device. The bipolar battery comprises n stacked bipolar electrodes, wherein n is greater than 1; each bipolar electrode comprises a current collector, a positive electrode and a negative electrode; the positive electrode film layer is arranged on one side of the current collector, the side, provided with the positive electrode film layer, of the current collector is a positive electrode side, and the side, opposite to the positive electrode side, of the current collector is a negative electrode side; and a negative electrode film layer or a conductive layer is optionally arranged on the negative electrode side.

The invention discloses a bipolar current collector and a preparation method thereof, a bipolar electrode and a battery, the bipolar current collector comprises a base film layer, an aluminum layer is arranged on the surface of one side of the base film layer, and a copper layer is arranged on the surface of the other side of the base film layer; the base film layer comprises a middle polymeric film layer and ceramic layers on the surfaces of the two sides of the polymeric film layer; miniature channels for lithium ions to pass through are distributed on the bipolar current collector along the thickness direction, and the miniature channels penetrate through the aluminum layer, the base film layer and the copper layer. A diaphragm in a traditional bipolar electrode is omitted, so that the volume energy density in the battery is remarkably improved, lithium ions in the battery can have diffusion channels in multiple directions, the internal resistance of the battery is reduced, and the rate capability is improved. According to the invention, a diaphragm lamination process is omitted, the production efficiency can be improved, and meanwhile, the risk of short circuit at the edges of the positive and negative active material layers caused by alignment errors of the lamination process is avoided.

To provide a manufacturing method of a bipolar electrode laminate which is capable of making densities of a cathode active material layer and an anode active material layer desirable and reduces manufacturing steps, and a manufacturing method of a bipolar battery including manufacturing such a bipolar electrode laminate.SOLUTION: A method of manufacturing a bipolar electrode laminate successively comprising a first electrode active material layer, a current collector layer and a second electrode active material layer includes: providing a first electrode mixture containing a first electrode active material and a first binder and a second electrode mixture containing a second electrode active material, a second binder and an electrolyte component; depositing the first electrode mixture on a first face of the current collector layer to form a first electrode active material layer precursor and depositing the second electrode mixture on a second face of the current collector layer to form a second electrode active material layer precursor; pressing a laminate including the first electrode active material layer precursor, the current collector layer and the second electrode active material layer precursor; and solving the electrolyte component in the second electrode active material layer with a solvent after the pressing to generate an electrolytic solution.SELECTED DRAWING: Figure 1

The invention relates to the technical field of electrode plates, and discloses a dual-electrode plate of a solid-state lithium metal battery and a preparation method of the dual-electrode plate. Comprising the following operation steps: depositing nano-copper on one side of a polymer base material layer to obtain a copper base layer; further depositing foamy copper on the surface of the copper base layer to obtain a foamy copper layer; a pole piece A is formed; depositing metal aluminum on the other side of the polymer base material layer in the pole piece A to obtain an aluminum layer; a pole piece B is formed; depositing metal lithium on the surface of the foamy copper layer in the pole piece B to obtain a metal lithium layer; further coating the surface of the lithium metal layer with an organic solution, and drying to obtain a polymer solid electrolyte layer; a pole piece C is formed; coating the surface of the aluminum layer in the pole piece C with positive active slurry, and drying to obtain a positive active material layer which is taken as a pole piece D; and rolling the pole piece D, respectively carrying out transfer welding on the aluminum layer on the positive electrode side and the copper layer on the negative electrode side, and leading out a metal foil tab to obtain the dual-electrode pole piece of the solid-state lithium metal battery.

An electrochemical cell comprising a non electrically-conductive structural frame for supporting components of the electrochemical cell and a tensioning element, wherein the structural frame comprises engagement means adapted to engage the tensioning element, wherein the engagement means comprises at least two bosses on the structural frame, each boss adapted to engage with a corresponding aperture on the tensioning element.

A power storage device (10) comprises: a positive electrode (21) in which a positive electrode active material layer (21b) is formed on a first surface (21a1) of a positive electrode collector (21a); and a sealing part (24) that is adhered to the first surface (21a1) of the positive electrode (21). The sealing part (24) is formed from an acid-modified polyolefin resin. The positive electrode (21) comprises a carbon coating layer (M) that is provided at the portion of the first surface (21a1) of the positive electrode collector (21a) to which the sealing part (24) is adhered. The carbon coating layer (M) includes carbon particles and a coating layer binding agent. For the coating layer binding agent, the intensity ratio (PCOO / PCH) of a peak (PCOO) that represents a COO structure to a peak (PCH) that represents a CH structure on an IR absorption spectrum, as measured by infrared spectrophotometer, is 0.5-3.3.

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.

Described herein is an all-solid-state battery comprising two or more mono cells connected in series, wherein: each mono cell comprises a lithium-based cathode, a sulfide solid electrolyte, and an anode; and adjacent mono cells are connected through a single, shared current collector in contact with a cathode and an anode of adjacent mono cells. The all-solid-state battery can be fabricated by stacking freestanding layers of the lithium-based cathode, the sulfide solid electrolyte, the anode, and the current collector in a bipolar design, and pressing the layers together to form the all-solid-state battery. The lithium-ion battery -can be incorporated into portable electronics and electric vehicles.

Provided in the present application are a bipolar battery and an electric apparatus. The bipolar battery comprises n stacked bipolar electrodes, where n>1. Each of the bipolar electrodes comprises: a current collector, and a positive-electrode film layer provided on one side of the current collector, wherein the side of the current collector on which the positive-electrode film layer is provided is a positive side, and the side opposite to the positive side is a negative side; and the negative side is optionally provided with a negative electrode film layer or a conductive layer.

A bipolar battery pack comprising one or a plurality of modules wherein at least one module comprises a set of multiple bipolar electrodes internally connected in series, wherein the bipolar electrode comprises: (a) a current collector; (b) a positive electrode layer, disposed on one primary surface, comprising a mixture of particles of a cathode active material and a hybrid electrolyte comprising a mixture of an inorganic solid-state electrolyte and a solid polymer electrolyte or gel polymer electrolyte, and (c) either a negative electrode layer deposited on the opposing primary surface or initially without a negative electrode layer, wherein the multiple bipolar electrodes are connected in series in such a manner that an ion-permeable separator or solid-state electrolyte layer is disposed between the negative electrode layer of a bipolar electrode and the positive electrode layer of a neighboring bipolar electrode. Multiple modules can be connected in parallel.

The invention relates to the technical field of batteries, in particular to a composite current collector, a battery cell adopting the composite current collector and a preparation method of the battery cell. The preparation method of the battery cell comprises the following preparation steps: coating one side of a copper foil layer of a composite current collector with negative electrode slurry to form a negative electrode side, baking, and rolling to prepare a pole roll; coating one side of the aluminum foil layer of the composite current collector with the positive electrode slurry to form a positive electrode side, baking and rolling to prepare a novel pole piece; laminating the negative electrode sides of the two novel pole pieces to form a single battery cell structure; superposing at least two battery cell single structures to prepare a battery cell; wherein the porosity of the diaphragm layer of the composite current collector is 30-50%; according to the battery cell process, the use amount of current collector copper foil / aluminum foil is reduced, and the energy density of the battery cell is improved; positive and negative pole piece preparation and lamination links are simplified, the manufacturing process is greatly simplified, and the efficiency is improved; the electron / ion conducting path of the pole piece is reduced, and the rate capability of the battery is improved.

A power storage device includes a stack 2 and a sealing body 3. A bipolar electrode 21 includes a current collector 24 having a surface 24a and a surface 24b opposite the surface 24a, a positive electrode active material layer 25 provided on the surface 24a, and a negative electrode active material layer 26 provided on the surface 24b. The sealing body 3 includes a sealing member 4. The current collector 24 has a rectangular shape with at least one side exceeding 1 m when viewed in a stack direction D of the stack 2, and includes a first metal foil 241 including the surface 24a, a second metal foil 242 including the surface 24b and thinner than the first metal foil 241, and an adhesive layer 243 provided between the first metal foil 241 and the second metal foil 242 and adhering the first metal foil 241 and the second metal foil 242. The adhesive layer 243 is thinner than the second metal foil 242.

An electric power storage module includes a stacked body having an outer surface, and a sheet member provided in close contact with the stacked body to cover the outer surface in a cross section in a stacking direction of the stacked body, wherein the stacked body includes a plurality of electrodes and a sealing part, the electrode includes a current collector having one surface and the other surface on a side opposite to the one surface, the plurality of electrodes are stacked so that the one surface of each of the current collectors faces the same direction, the sealing part defines a space which accommodates an electrolyte together with the current collector adjacent in the stacking direction, and the sheet member includes a metal layer, and a first insulating layer stacked on the metal layer.

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.

A method for forming a bipolar battery may apply a cathode layer to a current collector, comprising: providing a cathode mixture; and feeding the cathode mixture through a plurality of cathode calendar rolls. The method may apply an anode layer to the current collector, comprising: providing an anode mixture; and feeding the anode mixture through a plurality of anode calendar rolls. The cathode mixture and the anode mixture are fed into the plurality of cathode calendar rolls and the plurality of anode calendar rolls asymmetrically.

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).

Lead-acid batteries or cells, electrodes and bipolar plates for the same, and methods of manufacturing the same are provided. The lead-acid batteries comprise a positive and / or negative electrode having a specific pore size diameter distribution. The pore size diameter distribution may comprise: a ratio of a volume of pores having a pore size diameter greater than 20 μm to a total pore volume of at least 15%; or a volume of pores having a pore size diameter greater than 20 µm of at least 0.020 ml / g.

The bipolar current collector includes a first metal foil, an adhesive layer, and a second metal foil. The first metal foil has a first main surface and a second main surface. The second main surface is an opposite surface to the first main surface. The bonding layer covers the first main surface. The adhesive layer has electron conductivity. The second metal foil is adhered to the first main surface via the adhesive layer. The second metal foil has a frame-shaped planar shape. The second metal foil is attached along the periphery of the first main surface.

This power storage device (10) comprises a power storage cell (20) that is comprised of a positive electrode (21), a negative electrode (22), a separator (23), and a sealing part (24) that forms a sealed space for housing a liquid electrolyte between the positive electrode (21) and the negative electrode (22). The positive electrode (21) has a positive electrode active material layer (21b) that is formed on a first surface (21a1) of a positive electrode current collector (21a). The first surface (21a1) of the positive electrode current collector (21a) is formed of aluminum. The sealing part (24) is formed of an acid-modified polyolefin resin, and is bonded to the first surface (21a1) of the positive electrode current collector (21a). The positive electrode (21) comprises a carbon coating layer (M) that is provided, at a bonded portion with the sealing part (24), on the first surface (21a1) of the positive electrode current collector (21a). The carbon coating layer (M) contains carbon particles and a coating layer binding agent. The basis weight of the carbon coating layer M is 0.2 g / m2 or more.

A method of manufacturing a collector with an electrode of the present disclosure has a step of fabricating a collector with a coating, and a step of fabricating a collector with an electrode. In fabricating the collector with a coating, a composite material slurry is coated on a collector that is a sheet-shaped collector having plural through-holes or is a web-shaped collector having plural through-holes, and a collector with a coating, which has at least one coating of the composite material slurry, is fabricated. In fabricating the collector with an electrode, cooling air is blown onto the through-holes simultaneously with irradiating of light for heating onto the coating of the collector with a coating, and drying the coating to form a positive electrode layer or a negative electrode layer is formed, and the collector with an electrode is fabricated.

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.

Aspects of the disclosure include a bipolar electrode design for metal-ion secondary battery cells and methods of manufacturing the same. An exemplary vehicle includes an electric motor and a battery pack electrically coupled to the electric motor. The battery pack includes a battery cell including a bipolar current collector, an anode coating layer formed on a first surface of the bipolar current collector, and a cathode coating layer formed on a second surface of the bipolar current collector. The battery cell further includes a roll-to-roll ion channel blocker disposed along a first edge of the bipolar current collector and a layer-by-layer ion channel blocker disposed along a second edge and a third edge of the bipolar current collector orthogonal to the first edge.The battery cell further comprises an ionically conductive gel electrolyte formed over the anode coating layer and the cathode coating layer.

formula Q + (R A )(R B )(R C )(R D )X - A bipolar electrode is disclosed that includes a cathode substrate loaded with a halogen complexing agent having the structure: The bipolar electrode also includes a bipolar electrode plate having a cathode surface and an anode surface, the cathode surface being opposite the anode surface. The cathode surface is at least partially in contact with the cathode substrate. Electrochemical cells and battery stacks that include the bipolar electrode, as well as methods for manufacturing the bipolar electrode, are also disclosed. TIFF2024512677000004.tif103170

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.