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锂二次电池、正极活性材料及其制备方法、用电设备

InventionUnknown
10Claims · 4 independent
§ Ⅰ

Dossier Overview

Inventor

温晓辉; 冯欣; 赵栋; 沈重亨; 柳娜

Filing Date

Apr 2, 2025

Publication Date

Oct 16, 2026

IPC Classification

H01M 4/36 (2006.01)H01M 4/525 (2010.01)H01M 4/505 (2010.01)H01M 10/0525 (2010.01)C01G 53/502 (2025.01)C01B 25/30 (2006.01)

本申请公开了一种锂二次电池、正极活性材料及其制备方法、用电设备,涉及二次电池领域,正极活性材料包括本体和形成在本体至少部分表面的包覆层,包覆层包括Si元素、P元素、S元素、B元素、F元素、Cu元素、Zn元素、Y元素、Zr元素中的一种或多种,正极活性材料的表面有n个区域,n大于或等于3,n个区域内Si元素、P元素、S元素、B元素、F元素、Cu元素、Zn元素、Y元素、Zr元素中的任意一种的质量占比的标准差为0.1%‑0.25%,n个区域内Si元素、P元素、S元素、B元素、F元素、Cu元素、Zn元素、Y元素、Zr元素中的任意一种的质量占比的平均值为0.1%‑0.4%。本申请提出的锂二次电池具有优异的循环寿命。

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