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二次电池及其制备方法、用电装置

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宁德时代新能源科技股份有限公司

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Inventor

李静丽; 彭龙庆; 吉星; 叶瑞来; 卜凡珉; 焦晨楠

Filing Date

Apr 24, 2025

Publication Date

Oct 27, 2026

IPC Classification

H01M 10/058 (2010.01)H01M 10/0525 (2010.01)H01M 10/054 (2010.01)H01M 4/131 (2010.01)H01M 4/525 (2010.01)H01M 4/505 (2010.01)H01M 4/1391 (2010.01)H01M 10/42 (2006.01)

本申请提供了一种二次电池及其制备方法、用电装置。二次电池，包括正极极片，所述正极极片包括：正极集流体；正极活性材料层，所述正极活性材料层位于所述正极集流体的至少一侧；所述正极活性材料层包括正极活性材料，所述正极活性材料的莫氏硬度为3‑6；底涂层，所述底涂层位于所述正极集流体与所述正极活性材料层之间；所述底涂层的孔隙率小于或等于3％。由此，本申请二次电池的安全性能得到进一步提升。

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二次电池及其制备方法、用电装置

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