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POLYETHER POLYMER, POLYETHER ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, COMPOSITE SOLID ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

NºPublicación:  WO2025206149A1 02/10/2025
Solicitante: 
OSAKA SODA CO LTD [JP]
\u682A\u5F0F\u4F1A\u793E\u5927\u962A\u30BD\u30FC\u30C0

Resumen de: WO2025206149A1

The present invention provides: a polyether polymer capable of suppressing a side reaction with a sulfide-based solid electrolyte, and having a high ion transference number; a polyether electrolyte for a lithium ion secondary battery using the polyether polymer; a composite solid electrolyte for a lithium ion secondary battery; and a lithium ion secondary battery. The present invention relates to a polyether polymer including 20 mol% or more of an X unit, which is a constituent unit derived from a specific trimethylene oxide, in 100 mol% of constituent units.

SECONDARY BATTERY AND ELECTRONIC DEVICE

NºPublicación:  WO2025199687A1 02/10/2025
Solicitante: 
NINGDE AMPEREX TECH LIMITED [CN]
\u5B81\u5FB7\u65B0\u80FD\u6E90\u79D1\u6280\u6709\u9650\u516C\u53F8
CN_120019524_PA

Resumen de: WO2025199687A1

The present application provides a secondary battery and an electronic device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte; and when the secondary battery is charged to 3.6 V, the XRD diffraction pattern of the positive electrode sheet has a characteristic peak A in the range of 18° to 19°, a characteristic peak B in the range of 15° to 16°, and a characteristic peak C in the range of 44° to 46°. The electrolyte comprises a first additive, and the first additive comprises at least one of compounds represented by formula I, formula II, formula III, and formula IV; and on the basis of the mass of the electrolyte, the mass percentage content of the first additive is M%, wherein 0.02≤M≤6. The positive electrode sheet having the described characteristics ensures high structural stability of the positive electrode sheet, and moreover, the electrolyte containing the first additive and the value of M being regulated within the described range improve the high-temperature storage performance, the high-temperature cycling performance, and the float charging performance of the secondary battery.

SILICON-CARBON COMPOSITE MATERIAL, NEGATIVE ELECTRODE SHEET AND BATTERY

NºPublicación:  WO2025200653A1 02/10/2025
Solicitante: 
ZHUHAI COSMX BATTERY CO LTD [CN]
\u73E0\u6D77\u51A0\u5B87\u7535\u6C60\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_118213508_PA

Resumen de: WO2025200653A1

A silicon-carbon composite material, a negative electrode sheet and a battery. The silicon-carbon composite material comprises a hierarchically porous carbon material, silicon nanoparticles dispersed in pore channels of the hierarchically porous carbon material, and an amorphous carbon layer that coats a surface of the hierarchically porous carbon material, wherein the porous structure of the hierarchically porous carbon material comprises micropores, mesopores and macropores, the pore volume is 0.4 cm3/g to 1.5 cm3/g, and the pore volume of the micropores accounts for 60% to 92% of the total pore volume. The silicon-carbon composite material can effectively inhibit the aggregation of the silicon nanoparticles and reduce the phenomenon of stress concentration; and when the silicon-carbon composite material is used as a negative electrode active material for the preparation of a battery, better first-cycle efficiency, a lower expansion rate and a higher cycling stability can be obtained.

POROUS LI-ION CONDUCTING GARNET CERAMICS

NºPublicación:  WO2025199641A1 02/10/2025
Solicitante: 
THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIV [CA]
THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY

Resumen de: WO2025199641A1

There is provided a porous Li-ion conducting garnet ceramic having a porosity of from 20% to 45%. The garnet has a formula Li7-xDyLa3Zr2O12 where x and y are 0 ≤ x ≤ 3 and 0 ≤ y ≤ 1 respectively and D is a dopant selected from Ta, Nb, Al, Sn, Ge, Si, Li, Na, and K. The garnet is particularly suited for forming a composite with a polymer electrolyte. This composite can be used in the manufacture of all solid state batteries.

END COVER ASSEMBLY, ENERGY STORAGE DEVICE, AND ELECTRIC APPARATUS

NºPublicación:  WO2025200638A1 02/10/2025
Solicitante: 
XIAMEN HITHIUM ENERGY STORAGE TECH CO LTD [CN]
\u53A6\u95E8\u6D77\u8FB0\u50A8\u80FD\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
US_2025309421_A1

Resumen de: WO2025200638A1

The present application discloses an end cover assembly, an energy storage device, and an electric apparatus. The end cover assembly comprises an end cover, an upper plastic, and a pole; the end cover comprises a first surface and a second surface which are provided facing away from each other; the pole comprises a pole body and a flange connected to one end of the pole body; the end cover further comprises a mounting hole; the mounting hole passes through the first surface and the second surface; a protruding portion protrudes out of the first surface; the protruding portion surrounds the mounting hole; the protruding portion is provided with an end surface; the upper plastic comprises an upper plastic body and a protruding ridge; the plastic body comprises a stepped surface and an abutting surface; the stepped surface and the abutting surface are provided facing away from each other in the height direction of the upper plastic; the protruding ridge protrudes out of the edge of the stepped surface away from the center of the upper plastic, and the upper plastic body and the protruding ridge define a pole through hole; the pole passes through the pole through hole; the surface of the flange facing the pole body abuts against the stepped surface; the protruding ridge surrounds the periphery of the flange; the upper plastic and the pole are accommodated in the mounting hole; the protruding ridge protrudes out of the first surface; and the abutting surface abuts against the end

ALL-SOLID-STATE BATTERY AND BATTERY MODULE

NºPublicación:  WO2025206327A1 02/10/2025
Solicitante: 
AESC JAPAN LTD [JP]
\u682A\u5F0F\u4F1A\u793E\uFF21\uFF25\uFF33\uFF23\u30B8\u30E3\u30D1\u30F3

Resumen de: WO2025206327A1

An all-solid-state battery (10) satisfies at least one of the following requirements 1 and 2 and includes, in order: a positive electrode including a positive electrode active material layer (1); a solid electrolyte layer (5) including a solid electrolyte (A); and a negative electrode including a negative electrode active material layer (2). Requirement 1: the positive electrode active material layer (1) and the solid electrolyte layer (5) are in contact with each other, and when the contact length at the interface between the positive electrode active material layer (1) and the solid electrolyte layer (5) is L1A and the linear length is L2A, a ratio of L1A to L2A (L1A/L2A) is from 1.1 to 1.4. Requirement 2: the negative electrode active material layer (2) and the solid electrolyte layer (5) are in contact with each other, and when the contact length at the interface between the negative electrode active material layer (2) and the solid electrolyte layer (5) is L1B and the linear length is L2B, a ratio of L1B to L2B (L1B/L2B) is from 1.05 to 2.50.

ENERGY STORAGE APPARATUS

NºPublicación:  WO2025200349A1 02/10/2025
Solicitante: 
EVE ENERGY STORAGE CO LTD [CN]
\u6B66\u6C49\u4EBF\u7EAC\u50A8\u80FD\u6709\u9650\u516C\u53F8
CN_222927653_U

Resumen de: WO2025200349A1

An energy storage apparatus, comprising at least one battery compartment (101) and an electrical compartment (105). The battery compartment (101) comprises a battery case (102) and at least one battery unit (103). The battery case (102) is provided with a battery mounting cavity (104). The electrical compartment (105) is disposed on one side of the battery compartment (101). The battery compartment (101) and the electrical compartment (105) are separated. The positions of the electrical compartment (105) and the battery compartment (101) can be adjusted according to an actual application environment, thereby improving the universality of the energy storage apparatus. In addition, because the battery compartment (101) and the electrical compartment (105) are separated, when thermal runaway occurs in either one, interference to the other is avoided, thereby reducing the degree of thermal runaway, and thus improving the safety of the energy storage apparatus. The battery mounting cavity (104) is filled with a cooling medium (109), so as to immerse a plurality of battery units (103), so that the battery units (103) are in direct contact with the cooling medium (109), thereby improving the cooling efficiency.

LITHIUM ION BATTERY AND ELECTRICAL DEVICE

NºPublicación:  WO2025201356A1 02/10/2025
Solicitante: 
BYD COMPANY LTD [CN]
\u6BD4\u4E9A\u8FEA\u80A1\u4EFD\u6709\u9650\u516C\u53F8
EP_4625575_A1

Resumen de: WO2025201356A1

A lithium ion battery and an electrical device. The lithium ion battery comprises: a positive electrode, a negative electrode, and an electrolyte (05), the negative electrode comprising a negative electrode current collector (03) and at least one negative electrode active material layer (04), and the negative electrode active material layer (04) being coated on one side or two sides of the negative electrode current collector (03). The total thickness of the negative electrode active material layer (04) on the single side of the negative electrode current collector (03) is d μm, the ionic conductivity of the electrolyte (05) is C mS/cm, and the viscosity of the electrolyte (05) is δ mPa•s, wherein the following relational expression is satisfied: 3≤d/(C*δ)≤6. Matching the electrolyte (05) with different ionic conductivity and viscosity can improve the wettability of the electrolyte (05) to electrode sheets effectively, thus improving the cycle performance of lithium ion batteries in a wide temperature range.

NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, LITHIUM-ION SECONDARY BATTERY, AND LITHIUM-ION SECONDARY BATTERY MODULE

NºPublicación:  WO2025205672A1 02/10/2025
Solicitante: 
AESC JAPAN LTD [JP]
\u682A\u5F0F\u4F1A\u793E\uFF21\uFF25\uFF33\uFF23\u30B8\u30E3\u30D1\u30F3

Resumen de: WO2025205672A1

A negative electrode active material comprising a graphite powder and a Si/C powder that includes Si-C composite particles including silicon and a carbon material, wherein the value of CS1/CS2 is 0.32 or less, where CS1 and CS2 are the respective fracture strengths of the graphite powder and the Si/C powder as measured in accordance with JIS R 1639-5:2007.

BATTERY AND ELECTRICAL APPARATUS

NºPublicación:  WO2025200235A1 02/10/2025
Solicitante: 
CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
\u5B81\u5FB7\u65F6\u4EE3\u65B0\u80FD\u6E90\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_221150241_U

Resumen de: WO2025200235A1

A battery (100) and an electrical apparatus. The battery (100) comprises battery cells (20), a casing (10), and an adsorption device (30). A pressure relief mechanism (40) is provided on the casing (10), a second connecting part (302) is provided at an inlet end (301) of the adsorption device (30), and the second connecting part (302) is connected to the pressure relief mechanism (40) or the casing (10), so that the inlet end (301) is in communication with the pressure relief mechanism (40); in the event of thermal runaway, a combustible flue gas discharged from the pressure relief mechanism (40) can be directed into the adsorption device (30), and the adsorption device (30) is used to adsorb electrolyte vapor in the combustible flue gas, so that the electrolyte vapor is separated from the combustible flue gas, thereby effectively reducing the probability of combustion and explosion of the combustible flue gas.

BATTERY AND ELECTRIC DEVICE

NºPublicación:  WO2025200234A1 02/10/2025
Solicitante: 
CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
\u5B81\u5FB7\u65F6\u4EE3\u65B0\u80FD\u6E90\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_222300767_U

Resumen de: WO2025200234A1

A battery (100) comprises battery cells (121) and a case (110). The case (110) comprises a case body (112) and limiting beams (10), the limiting beams (10) being arranged in the case body (112) to define an accommodating space. The battery cells (121) are arranged in the accommodating space. Each limiting beam (10) comprises a first beam side surface (11) and a second beam side surface (12) that are arranged opposite each other in a first direction (X), wherein the second beam side surface (12) is configured as a vertical plane abutting against a large surface of each battery cell (121), the large surface being a side surface of each battery cell (121) with the largest surface area; and at least part of the first beam side surface (11) is inclined towards the second beam side surface (12).

METHOD FOR MANUFACTURING QUASI-SOLID-STATE BATTERY

NºPublicación:  WO2025205670A1 02/10/2025
Solicitante: 
FUJIFILM CORP [JP]
\u5BCC\u58EB\u30D5\u30A4\u30EB\u30E0\u682A\u5F0F\u4F1A\u793E

Resumen de: WO2025205670A1

This method for manufacturing a quasi-solid-state battery comprises: a step for forming an aggregate having a volume-average particle diameter of 10-500 μm and a specific surface area of 20 m2/g to 25 m2/g, the aggregate being composed of an electrode active material and an electroconductive assistant; a step for stirring the aggregate while heating the aggregate to 100-300°C under reduced pressure; a step for mixing the aggregate with an electrolytic solution to obtain an electrode material; and a step for providing the electrode material on a support to form an electrode layer.

BATTERY CELL, BATTERY AND ELECTRICAL DEVICE

NºPublicación:  WO2025200074A1 02/10/2025
Solicitante: 
CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
\u5B81\u5FB7\u65F6\u4EE3\u65B0\u80FD\u6E90\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_221226383_U

Resumen de: WO2025200074A1

A battery cell (100), a battery (200), and an electrical device. The battery cell (100) comprises a housing (10), an electrode assembly (30) and an end cover (20). The housing (10) is provided with a first end part (11) and a second end part (12) opposite to the first end part (11). The first end part (11) is provided with an opening (111). The housing (10) comprises an inner wall surface (13) and an outer wall surface (14). The outer wall surface (14) is provided with a weak structure (141). The weak structure (141) is closer to the opening (111) relative to the second end part (12). The housing (10) comprises a first wall (15) and a second wall (16) connected to the first wall (15). The area of the first wall (15) is greater than the area of the second wall (16). The weak structure (141) is formed on the outer wall surface (14) of the first wall (15). The electrode assembly (30) is arranged in the housing (10). The end cover (20) is in sealed connection with the housing (10) and seals the opening (111).

BATTERY CELL, BATTERY AND ELECTRICAL DEVICE

NºPublicación:  WO2025200073A1 02/10/2025
Solicitante: 
CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
\u5B81\u5FB7\u65F6\u4EE3\u65B0\u80FD\u6E90\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_221226309_U

Resumen de: WO2025200073A1

A battery cell (100), a battery (200), and an electrical device. The battery cell (100) comprises a housing (10), an electrode assembly (40), a top cover (20), and an insulating film (30). The housing (10) has a first end part (11) and a second end part (12) opposite to the first end part (11). The first end part (11) is formed with an opening (111). The housing (10) comprises an inner surface (13) and an outer surface (14). The inner surface (13) is provided with an energy absorption structure (141). The energy absorption structure (141) is closer to the opening (111) relative to the second end part (12). The electrode assembly (40) is arranged in the housing (10). The top cover (20) is in sealed connection with the housing (10) and seals the opening (111). The insulating film (30) is arranged on the outer surface (14).

DOUBLE-LAYER-COATED LITHIUM-ION POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF

NºPublicación:  WO2025200490A1 02/10/2025
Solicitante: 
XTC NEW ENERGY MAT XIAMEN CO LTD [CN]
\u53A6\u95E8\u53A6\u94A8\u65B0\u80FD\u6E90\u6750\u6599\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_118231621_PA

Resumen de: WO2025200490A1

The present invention relates to the technical field of lithium batteries. Disclosed are a double-layer-coated lithium-ion positive electrode material, and a preparation method therefor and the use thereof. The double-layer-coated lithium-ion positive electrode material sequentially comprises a positive electrode active material, an ion transport coating layer and an interstitial inert material coating layer at a mass ratio of 100:(0.05-5):(0.02-3) from inside to outside, wherein the components of the ion transport coating layer comprise a first component and a second component, the first component comprising at least one of Li2CO3 and Li2O, and the second component being a lithium-containing metallic compound; and the interstitial inert material coating layer is at least one of a non-Al metallic oxide and an Al-containing compound. The interstitial inert material coating layer can play a role in protecting the surface of the material during the process of cycling; moreover, since the interstitial inert material coating layer is in an interstitial state, the transport of lithium ions is not hindered, the impedance of the material is not significantly increased, ion dissolution from the surface of the material is significantly reduced, and the performance of the positive electrode material is significantly improved.

BIPOLAR CURRENT COLLECTOR, BIPOLAR ELECTRODE SHEET, ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

NºPublicación:  WO2025199951A1 02/10/2025
Solicitante: 
XIAMEN AMPACE TECH LIMITED [CN]
\u53A6\u95E8\u65B0\u80FD\u5B89\u79D1\u6280\u6709\u9650\u516C\u53F8

Resumen de: WO2025199951A1

A bipolar current collector, a bipolar electrode sheet, an electrochemical device and an electronic device. The bipolar current collector comprises a negative electrode current collector and a positive electrode current collector. The negative electrode current collector comprises a first polymer layer and a first metal layer, wherein the first metal layer is arranged on a surface of the side of the first polymer layer in the direction of thickness, and is a copper layer. The positive electrode current collector comprises a second polymer layer and a second metal layer, wherein the second metal layer is arranged on a surface of the side of the second polymer layer in the direction of thickness, and is an aluminum layer. In the direction of thickness of the bipolar current collector, the first metal layer, the first polymer layer, the second polymer layer, and the second metal layer are arranged in sequence, the first polymer layer being connected to the second polymer layer. The copper layer has a thickness of A μm, and the aluminum layer has a thickness of B μm, where A and B satisfy: 0.8≤A≤3.0 and 1.2≤B/A≤3.5. When applied in an electrochemical device, the bipolar current collector helps improve the energy density and cycling performance of the electrochemical device.

COMPOSITE MATERIAL

NºPublicación:  WO2025206831A1 02/10/2025
Solicitante: 
LG CHEM LTD [KR]
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Resumen de: WO2025206831A1

Disclosed in the present specification are a composite material and a fire extinguishing device, which are applied to a product or a device that is in an abnormal state or is likely to be in an abnormal state so as to effectively respond to the abnormal state. For example, the composite material may be applied to an article that includes a plurality of such products or devices, and may respond to abnormal heat generation, explosion, or ignition occurring in any one of the products or devices, while preventing or minimizing the propagation of such heat, explosion, or ignition to adjacent products or devices. The composite material or the like also exhibits excellent handling and storage stability. The present specification can also provide uses of the composite material, and the like.

CYLINDER TYPE RECHARGEABLE BATTERY

NºPublicación:  WO2025206616A1 02/10/2025
Solicitante: 
SAMSUNG SDI CO LTD [KR]
\uC0BC\uC131\uC5D0\uC2A4\uB514\uC544\uC774 \uC8FC\uC2DD\uD68C\uC0AC
US_2025300328_PA

Resumen de: WO2025206616A1

A cylinder-type rechargeable battery of the present invention comprises: an electrode assembly; a case including a body part and a recess part which is recessed toward the inside of the body part and of which a part is flat, and accommodating the electrode assembly; and a negative electrode current collecting plate including a base part having a portion connected to the electrode assembly and a contact part extending from an edge of the base part toward the recess part and contacting a portion formed of a flat surface in the inner surface of the case, and electrically connected to the electrode assembly.

FIRE EXTINGUISHING DEVICE

NºPublicación:  WO2025206829A1 02/10/2025
Solicitante: 
LG CHEM LTD [KR]
\uC8FC\uC2DD\uD68C\uC0AC \uC5D8\uC9C0\uD654\uD559

Resumen de: WO2025206829A1

The present specification discloses a fire extinguishing device which can be applied to products or elements that generate heat or have the probability of igniting or exploding during operation, storage, and/or maintenance, and effectively counteract the heat, ignition, and explosion. For example, the fire extinguishing device can be applied to an article comprising a plurality of the products or elements, and deals with abnormal heat generation, explosion, and ignition occurring in one of the elements or products and prevents or minimizes the spread of such heat, explosion, and ignition to other adjacent elements or products. The fire extinguishing device and the like also exhibits excellent handling and storage stability. The present specification may also provide a use of the fire extinguishing device and the like.

BATTERY CELL AND BATTERY PACK

NºPublicación:  WO2025200367A1 02/10/2025
Solicitante: 
SUNWODA MOBILITY ENERGY TECH CO LTD [CN]
\u6B23\u65FA\u8FBE\u52A8\u529B\u79D1\u6280\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_118263634_PA

Resumen de: WO2025200367A1

A battery cell (100) and a battery pack. The battery cell (100) comprises: a casing (110); an electrode assembly (120), which is accommodated in the casing (110); a first current collector disc (130), which is arranged at one end of the electrode assembly (120) in a first direction (Z) and connected to the electrode assembly (120); and an end cover (140), which is arranged at one end of the casing (110) in the first direction (Z) and connected to the casing (110). The end cover (140) comprises: a main body part (141), a circular electrolyte injection hole (1411) being formed in the main body part (141); an explosion-proof part (142), which is arranged on the main body part (141) and surrounding the periphery of the electrolyte injection hole (1411); and a groove (1431), which is arranged between the electrolyte injection hole (1411) and the explosion-proof part (142) on the main body part (141) and has a groove opening facing away from the outer side of the electrode assembly (120). The groove (1431) has a width size of L mm in the radial direction (X) of the electrolyte injection hole (1411), the diameter of the explosion-proof part (142) is D1 mm, and the diameter of the electrolyte injection hole (1411) is D2 mm, wherein 1≤L, L=K*(D1-D2)/2, and 0.1≤k≤0.7. The safety performance of the explosion-proof part (142) is ensured, thus improving the valve opening stability of the battery cell (100), and finally improving the safety performance of the battery cell (100).

BATTERY PACK AND ELECTRIC DEVICE

NºPublicación:  WO2025200100A1 02/10/2025
Solicitante: 
EVE ENERGY CO LTD [CN]
\u60E0\u5DDE\u4EBF\u7EAC\u9502\u80FD\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_222126821_U

Resumen de: WO2025200100A1

A battery pack, comprising: a CCS assembly (1); a battery case (2), wherein the CCS assembly (1) is mounted and fixed in the battery case (2); and a sealant component (3), wherein the sealant component (3) is arranged between the battery case (2) and the CCS assembly (1), and the sealant component (3) extends in the peripheral direction of the CCS assembly (1) to seal an assembly gap between the CCS assembly (1) and the battery case (2).

IRON PHOSPHATE HAVING LOW SULFUR CONTENT AND HIGH IRON-PHOSPHORUS RATIO, PREPARATION METHOD THEREFOR, AND USE THEREOF

NºPublicación:  WO2025200089A1 02/10/2025
Solicitante: 
HUBEI HONGRUN HIGH TECH NEW MAT CO LTD [CN]
\u6E56\u5317\u8679\u6DA6\u9AD8\u79D1\u65B0\u6750\u6599\u6709\u9650\u516C\u53F8
CN_118183658_PA

Resumen de: WO2025200089A1

The present application relates to the technical field of battery materials, and provides iron phosphate having low sulfur content and a high iron-phosphorus ratio, a preparation method therefor, and a use thereof. The preparation method for the iron phosphate having low sulfur content and a high iron-phosphorus ratio comprises: providing amorphous iron phosphate; adding water and phosphoric acid into the amorphous iron phosphate for slurrying treatment, and then heating and aging to obtain an aged slurry; carrying out slurry washing and filter pressing on the aged slurry to obtain a first filter cake; adding water and a first pH regulator into the first filter cake for slurry washing to obtain a first slurry having a pH value range of 3.0-5.0, and carrying out filter pressing on the first slurry to obtain a second filter cake; and rinsing, drying and calcining the second filter cake to obtain iron phosphate having low sulfur content and a high iron-phosphorus ratio. The present application facilitates preparation of iron phosphate having low sulfur content, a high iron-phosphorus ratio, and a large specific surface area. The iron phosphate can be used for preparing lithium iron phosphate having good electrochemical performance, and the lithium iron phosphate can be further used for preparing a positive electrode sheet and a secondary battery having good electrochemical performance.

NEGATIVE ELECTRODE AND PREPARATION METHOD THEREFOR, BATTERY AND ELECTRIC DEVICE

NºPublicación:  WO2025200345A1 02/10/2025
Solicitante: 
BYD COMPANY LTD [CN]
\u6BD4\u4E9A\u8FEA\u80A1\u4EFD\u6709\u9650\u516C\u53F8
CN_120727741_PA

Resumen de: WO2025200345A1

A negative electrode and a preparation method therefor, a battery and an electric device. The negative electrode comprises a negative electrode current collector and a negative electrode active material layer arranged on a surface of the negative electrode current collector, wherein the negative electrode active material layer comprises graphite, the orientation value of the negative electrode active material layer is less than or equal to 3, and the binding force between the negative electrode current collector and the negative electrode active material layer is greater than or equal to 0.25 N/40 mm; and the orientation value is the ratio of the peak area of the characteristic diffraction peak (004) in an X-ray diffraction spectrum of the negative electrode to the peak area of the characteristic diffraction peak (110).

BINDER COMPOSITION FOR NONAQUEOUS SECONDARY BATTERY ELECTRODE, SLURRY COMPOSITION FOR NONAQUEOUS SECONDARY BATTERY ELECTRODE, NONAQUEOUS SECONDARY BATTERY ELECTRODE, AND NONAQUEOUS SECONDARY BATTERY

NºPublicación:  WO2025205859A1 02/10/2025
Solicitante: 
ZEON CORP [JP]
\u65E5\u672C\u30BC\u30AA\u30F3\u682A\u5F0F\u4F1A\u793E

Resumen de: WO2025205859A1

The purpose of the present invention is to provide a binder composition for a nonaqueous secondary battery electrode, which imparts excellent viscosity stability to a slurry composition for a nonaqueous secondary battery electrode, imparts excellent peel strength to a nonaqueous secondary battery electrode, satisfactorily suppresses swelling of a nonaqueous secondary battery electrode due to repetition of charging and discharging, and can satisfactorily suppress an increase in the resistance of a nonaqueous secondary battery due to repetition of charging and discharging. The present invention provides a binder composition for a nonaqueous secondary battery electrode, the binder composition containing water and a particulate polymer that has a zeta potential of -100.00 mV to -35.00 mV inclusive, an insoluble fraction in tetrahydrofuran of 60 mass% to 99 mass% inclusive, a median diameter D50 in terms of volume of 90 nm to 500 nm inclusive, and a surface acid amount of 0.05 mmol/g to 1.00 mmol/g inclusive.

POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, ELECTRODE SHEET, BATTERY, AND ELECTRIC DEVICE

Nº publicación: WO2025200491A1 02/10/2025

Solicitante:

CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
CHENGDU JINTANG TIMES NEW MATERIALS TECH CO LTD [CN]
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Resumen de: WO2025200491A1

A positive electrode active material and a preparation method therefor, an electrode sheet, a battery, and an electric device. A positive electrode active material, wherein the positive electrode active material is a compound of Na4+xR3-yP4O15 and C, wherein 0≤x<0.8, 0≤y≤0.8, and R comprises at least one of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Cr, Nb, Mo, In, Ga, Sn, Hf, Ta, W and Pb; and the porosity of the positive electrode active material is 0.69-1.7%. The positive electrode active material is beneficial to increasing the material compaction density, thereby helping to increase the volumetric energy density of the battery.

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