PRE-LITHIATED ELECTRODE PLATE AND PREPARATION METHOD THEREFOR, SECONDARY BATTERY, AND ELECTRIC DEVICE

WIPO Patent Application WO/2024/016891

A1

The present application relates to the technical field of secondary batteries, and in particular relates to a pre-lithiated electrode plate and a preparation method therefor, a secondary battery and an electric device. The pre-lithiated electrode plate comprises a current collector and an active material layer, which is arranged on at least one surface of the current collector; and a lithium supplementing layer is arranged between the current collector and the at least one active material layer, wherein the surface roughness of the current collector is 2-5 μm, and the active material layer has a porous structure. By using the current collector having a certain surface roughness, the lithium supplementing material can be loaded thereon so as to form a lithium supplementing layer; and the release of active lithium can be achieved through the pores of the active material layer so as to supplement lithium to the battery, without the need for changing the traditional battery cell structure. The pre-lithiated electrode plate has a simple structure, and can be produced by using an existing electrode plate preparation process, no new equipment is required, and the production cost can be effectively reduced.

WANG SHAOSHAN (CN)
HE JIANFU (CN)
LIU QIAN (CN)
YE YONGHUANG (CN)

PCT/CN2023/099576

January 25, 2024

June 12, 2023

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M4/13

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CN114709422A	2022-07-05
CN112599723A	2021-04-02

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