NEGATIVE ELECTRODE POLE PIECE, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRICAL APPARATUS

WIPO Patent Application WO/2023/023984

A1

Provided in the present disclosure are a negative electrode pole piece, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The negative electrode pole piece comprises a negative electrode current collector and a negative electrode film layer disposed on the negative electrode current collector. The negative electrode film layer comprises a first negative electrode film layer and a second negative electrode film layer, the second negative electrode film layer being located between the negative electrode current collector and the first negative electrode film layer. The second negative electrode film layer comprises a metal element M. Furthermore, the atomic radius rM of M and the atomic radius rLi of Li satisfy (aa). The present application can effectively inhibit the precipitation of lithium metal on the surface of a negative electrode pole piece, significantly improving dynamic performance, cycle performance and safety performance of a secondary battery.

JP5828304	Method for manufacturing composite active material, solid-state battery and composite active material
WO/2000/060682	THIN LITHIUM FILM BATTERY
WO/2021/150168	NA EXCESS P3-TYPE LAYERED OXIDES NAXMYOZ WITH X ≥ 0.66; 0.8 ≤ Y ≤ 1.0 AND Z ≤ 2 AS CATHODE MATERIALS FOR SODIUM ION BATTERIES

CHEN BINYI (CN)
WANG JIAZHENG (CN)
YAN QINGWEI (CN)

PCT/CN2021/114579

March 02, 2023

August 25, 2021

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M4/36

CN112786948A	2021-05-11
CN113013379A	2021-06-22
CN107910496A	2018-04-13
US20210111410A1	2021-04-15

BEIJING EAST IP LTD. (CN)

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