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1. WO2026174453 - POSITIVE ELECTRODE MATERIAL, SECONDARY BATTERY AND ELECTRONIC APPARATUS

Publication Number WO/2026/174453
Publication Date 27.08.2026
International Application No. PCT/CN2025/078025
International Filing Date 19.02.2025
IPC
H01M 4/58 2010.1
HELECTRICITY
01ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
C01B 25/45 2006.1
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
25Phosphorus; Compounds thereof
16Oxyacids of phosphorus; Salts thereof
26Phosphates
45containing plural metal, or metal and ammonium
H01M 4/36 2006.1
HELECTRICITY
01ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
H01M 10/00 2006.1
HELECTRICITY
01ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
Applicants
  • 宁德新能源科技有限公司 NINGDE AMPEREX TECHNOLOGY LIMITED [CN]/[CN]
Inventors
  • 冷倩怡 LENG, Qianyi
  • 徐磊敏 XU, Leimin
  • 郎野 LANG, Ye
Agents
  • 北京恒博知识产权代理有限公司 BEIJING HENGBO INTELLECTUAL PROPERTY AGENT LTD.
Priority Data
Publication Language Chinese (zh)
Filing Language Chinese (zh)
Designated States
Title
(EN) POSITIVE ELECTRODE MATERIAL, SECONDARY BATTERY AND ELECTRONIC APPARATUS
(FR) MATÉRIAU D'ÉLECTRODE POSITIVE, BATTERIE SECONDAIRE ET APPAREIL ÉLECTRONIQUE
(ZH) 正极材料、二次电池及电子装置
Abstract
(EN) Disclosed in the present application are a positive electrode material, a secondary battery and an electronic apparatus. The positive electrode material comprises a lithium phosphate salt, the lithium phosphate salt comprising a first element and a second element; the first element comprises cobalt and nickel; on the basis of the total mass of the positive electrode material, the mass percentage of the first element is a%, and 35.5≤a≤37.5; the second element comprises tungsten, vanadium and chromium; and on the basis of the total mass of the positive electrode material, the mass percentage of the second element is b%, and 0.1≤b≤1.5. The positive electrode material is rod-shaped grains having an olivine structure, wherein the length-to-diameter ratio of a single grain of the positive electrode material is P, and, on the basis of the number of grains of the positive electrode material, the proportion of the number of grains whose P≥1.5 is A%, and 50≤A≤100; the average length of the positive electrode material is I nm, and 150≤I≤1000. The positive electrode material provided in the present application can improve the energy density of secondary batteries, and improve both low-temperature discharge performance and high-rate discharge performance.
(FR) La présente demande concerne un matériau d'électrode positive, une batterie secondaire et un dispositif électronique. Le matériau d'électrode positive comprend un sel de phosphate de lithium, le sel de phosphate de lithium comprenant un premier élément et un second élément ; le premier élément comprend du cobalt et du nickel ; sur la base de la masse totale du matériau d'électrode positive, le pourcentage en masse du premier élément est de a %, et 35,5 ≤ a ≤ 37,5 ; le second élément comprend du tungstène, du vanadium et du chrome ; et sur la base de la masse totale du matériau d'électrode positive, le pourcentage en masse du second élément est de b %, et 0,1 ≤ b ≤ 1,5. Le matériau d'électrode positive se présente sous forme de grains en bâtonnets ayant une structure d'olivine, le rapport longueur sur diamètre d'un seul grain du matériau d'électrode positive étant P, et, sur la base du nombre de grains du matériau d'électrode positive, la proportion du nombre de grains dont P ≥ 1,5 est de A %, et 50 ≤ A ≤ 100 ; la longueur moyenne du matériau d'électrode positive est I nm, et 150 ≤ I ≤ 1 000. Le matériau d'électrode positive selon la présente invention peut améliorer la densité d'énergie de batteries secondaires, et améliorer à la fois les performances de décharge à basse température et les performances de décharge rapide.
(ZH) 本申请公开了一种正极材料、二次电池及电子装置。正极材料包括磷酸锂盐,磷酸锂盐包括第一元素和第二元素;第一元素包括钴元素和镍元素,基于正极材料的总质量,第一元素的质量百分含量为a%,35.5≤a≤37.5;第二元素包括钨元素、钒元素和铬元素,基于正极材料的总质量,第二元素的质量百分含量为b%,0.1≤b≤1.5;正极材料为具有橄榄石结构的棒状晶粒,单颗正极材料的长径比为P,基于正极材料的颗粒数,P≥1.5的颗粒数占比为A%,50≤A≤100;正极材料的平均长度为I nm,150≤I≤1000。本申请提供的正极材料可以提高二次电池的能量密度,兼顾改善低温放电性能和大倍率放电性能。

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