COMPOSITE CURRENT COLLECTOR, COMPOSITE ELECTRODE SHEET, BATTERY CORE, BATTERY CELL, BATTERY AND ELECTRIC APPARATUS

WIPO Patent Application WO/2023/130986

A1

The present application relates to a composite current collector, a composite electrode sheet, a battery core, a battery cell, a battery, and an electric apparatus. The composite current collector comprises a polymer support layer having an air permeability of 50s/100cc-3000s/100cc and conductive layers having a porosity of 10%-95%. A negative electrode conductive layer and a positive electrode conductive layer are respectively arranged on two side surfaces of the polymer support layer. In the composite current collector, a negative electrode current collector and a positive electrode current collector are integrated, so that the size of the current collector can be reduced, and the energy density can be increased. In addition, the polymer support layer having specific air permeability and the conductive layers having specific porosity are selected, so that the mass of the current collector is reduced and lithium ions in an electrolyte can pass through the negative electrode current collector, which is beneficial to reducing the internal resistance of the battery. Thus, the internal resistance of a lithium ion secondary battery is reduced, and the energy density and cycling stability thereof are increased.

HE CHANGSHENG (CN)
LIU MINGJIAN (CN)
LI KEQIANG (CN)
XIE BIN (CN)
LIU XIAOSONG (CN)
WU ZHIYANG (CN)

PCT/CN2022/141406

July 13, 2023

December 23, 2022

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M4/80

WO2014157125A1

2014-10-02

CN113270589A	2021-08-17
CN113454816A	2021-09-28
JP2018098204A	2018-06-21

ACIP LAW OFFICES (CN)

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