# US 2026/0062298 A1 · Positive electrode active material, preparation method thereof, battery cell, and power consuming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0062298 A1 - Document ID: US20260062298A1 - Status: Published application - Kind: A1 - Application number: 19/383,794 - Filed: 2025-11-10 - Published: 2026-03-05 - Earliest claimed: 2023-07-07 - Assignees: Contemporary Amperex Technology Co., Limited - Applicants: Contemporary Amperex Technology Co., Limited - Inventors: Xue LENG; Siyuan HE; Changfeng BIE; Hongyu LIU; Huan NI; Na LIU - Web page: https://patentgrep.com/patent/US20260062298A1 ## CPC - C01B 25/45: containing plural metal, or metal and ammonium - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - C23C 16/26: Deposition of carbon only - H01M 4/136: Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy - H01M 4/366: {as layered products} - H01M 4/625: {Carbon or graphite} - C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer - C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer - C01P 2004/84: one phase coated with the other - C01P 2006/40: Electric properties - Y02E 60/10: Energy storage using batteries - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present application discloses a positive electrode active material, a preparation method thereof, a battery cell, and a power consuming apparatus. The positive electrode active material includes a lithium-containing phosphate, a charge capacity per gram of the positive electrode active material at 25° C. is denoted as C1, the charge capacity per gram of the positive electrode active material at 60° C. is denoted as C2, both units are mAh/g, and C2/C1≥1.020. The positive electrode active material provided in the present application can improve a cycle performance of a battery. ## Claims ### Claim 1 A positive electrode active material, wherein the positive electrode active material comprises a lithium-containing phosphate, a charge capacity per gram of the positive electrode active material at 25° C. is denoted as C1, the charge capacity per gram of the positive electrode active material at 60° C. is denoted as C2, both units are mAh/g, and C2/C1≥1.020. ### Claim 2 (depends on 1) The positive electrode active material according to claim 1, wherein 1.025≤C2/C1≤1.115. ### Claim 3 (depends on 2) The positive electrode active material according to claim 2, wherein 1.031≤C2/C1≤1.061. ### Claim 4 (depends on 1) The positive electrode active material according to claim 1, wherein at least a part of a surface of the lithium-containing phosphate has a carbon coating layer; and optionally, the carbon coating layer comprises a first carbon coating layer and a second carbon coating layer, and the first carbon coating layer is located between the lithium-containing phosphate and the second carbon coating layer. ### Claim 5 (depends on 4) The positive electrode active material according to claim 4, wherein a weight content of the first carbon coating layer is denoted as w1%, and based on a total weight of the positive electrode active material, 0.5≤w1≤2.0; and/or a weight content of the second carbon coating layer is denoted as w2%, and based on the total weight of the positive electrode active material, w2>0. ### Claim 6 (depends on 4) The positive electrode active material according to claim 4, wherein the weight content of the first carbon coating layer is denoted as w1%, the weight content of the second carbon coating layer is denoted as w2%, and both based on the total weight of the positive electrode active material, 1.14≤w1+w2≤1.55; and/or 0.030≤w2/w1≤0.240. ### Claim 7 (depends on 4) The positive electrode active material according to claim 4, wherein the first carbon coating layer comprises pyrolytic carbon formed by way of pyrolysis, and the second carbon coating layer comprises chemical vapor deposition carbon formed by way of chemical vapor deposition; and/or a graphitization degree of the first carbon coating layer is less than a graphitization degree of the second carbon coating layer. ### Claim 8 (depends on 1) The positive electrode active material according to claim 1, wherein the positive electrode active material is of a single-crystal structure or a quasi-single-crystal structure. ### Claim 9 (depends on 1) The positive electrode active material according to claim 1, wherein a volume distribution particle size Dv50 of the positive electrode active material ranges from 0.5 μm to 2.5 μm. ### Claim 10 (depends on 1) The positive electrode active material according to claim 1, wherein 145 mAh/g≤C1≤162 mAh/g; and/or 158 mAh/g≤C2≤167 mAh/g. ### Claim 11 (depends on 10) The positive electrode active material according to claim 10, wherein 152.5 mAh/g≤C1≤156.7 mAh/g; and/or 160.0 mAh/g≤C2≤162.8 mAh/g. ### Claim 12 (depends on 1) The positive electrode active material according to claim 1, wherein the lithium-containing phosphate comprises one or more of lithium iron phosphate and doped modified compounds thereof; optionally, the lithium-containing phosphate comprises a material with a molecular formula LimAxFe1-yByP1-zCzO4-nDn, wherein A comprises one or more elements of Zn, Al, Na, K, and Mg; B comprises one or more elements of Cu, Mn, Cr, Zn, Pb, Ca, Co, Ni, Sr, Nb, and Ti; C comprises one or more elements of B, S, Si, and N; D comprises one or more elements of S, F, Cl, and Br; m is selected from a range of 0.5 to 1.15, and is optionally selected from a range of 0.95 to 1.05; x is selected from a range of 0 to 0.1, and is optionally selected from a range of 0.001 to 0.005; y is selected from a range of 0 to 0.5, and is optionally selected from a range of 0.001 to 0.1; z is selected from a range of 0 to 0.5, and is optionally selected from a range of 0.001 to 0.1; and n is selected from a range of 0 to 0.5, and is optionally selected from a range of 0.001 to 0.1. ### Claim 13 A preparation method of a positive electrode active material, comprises the following steps: providing a lithium-containing phosphate precursor; grinding the lithium-containing phosphate precursor and a first carbon source, heating a ground material to a first temperature T1 in a protective gas atmosphere, and keeping the ground material at the first temperature T1 for a first time t1 to obtain a lithium-containing phosphate coated with a first carbon coating layer; and placing the obtained lithium-containing phosphate coated with a first carbon coating layer in a chemical vapor deposition device, heating the chemical vapor deposition device to a second temperature T2 in the protective gas atmosphere, introducing deposition gas, and then, keeping the chemical vapor deposition device at the second temperature T2 for a second time t2 to enable the deposition gas to deposit to form a second carbon coating layer, so as to obtain a positive electrode active material, wherein the positive electrode active material comprises the lithium-containing phosphate, a charge capacity per gram of the positive electrode active material at 25° C. is denoted as C1, the charge capacity per gram of the positive electrode active material at 60° C. is denoted as C2, both units are mAh/g, and C2/C1≥1.020. ### Claim 14 (depends on 13) The preparation method according to claim 13, wherein in the step of grinding the lithium-containing phosphate precursor and a first carbon source, a volume distribution particle size Dv50 of the ground material ranges from 350 nm to 500 nm. ### Claim 15 (depends on 13) The preparation method according to claim 13, wherein the first temperature T1 ranges from 760° C. to 850° C.; and/or the first time t1 ranges from 8 h to 15 h; and/or the second temperature T2 ranges from 600° C. to 800° C. ### Claim 16 (depends on 13) The preparation method according to claim 13, wherein a flow rate of the deposition gas is denoted as V, and a unit is L/min; a mass of the lithium-containing phosphate coated with a first carbon coating layer in the chemical vapor deposition device is denoted as m, and a unit is kg; and (V×t2)/m>0, and a unit of the second time t2 is min. ### Claim 17 (depends on 16) The preparation method according to claim 16, wherein (V×t2)/m ranges from 0.375 to 3.750. ### Claim 18 (depends on 13) The preparation method according to claim 13, wherein the first carbon source comprises one or more of glucose, sucrose, lactose, maltose, starch, cellulose, asphalt, polyethylene glycol, and carbon black; and/or the deposition gas comprises one or more of acetylene, methane, ethylene, propylene, benzene, and toluene; and/or the protective gas comprises one or more of nitrogen, argon, and helium. ### Claim 19 (depends on 1) A battery cell, comprising a positive electrode plate, the positive electrode plate comprising a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector, wherein the positive electrode film layer comprises the positive electrode active material according to claim 1. ### Claim 20 (depends on 19) A power consuming apparatus, comprising the battery cell according to claim 19.