POSITIVE POLE PIECE, ELECTROCHEMICAL DEVICE AND DEVICE - CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Title:

POSITIVE POLE PIECE, ELECTROCHEMICAL DEVICE AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/000547

Kind Code:

A1

Abstract:

A positive pole piece, an electrochemical device (5) and a device. The positive pole piece comprises a current collector (10) and an electrode active material layer (11) provided on at least one surface of the current collector (10), the current collector (10) comprising a support layer (101) and a conductive layer (102) provided on at least one surface of the support layer (101). The thickness D2 of a single surface of the conductive layer (102) satisfies: 30 nm≤D2≤3 μm. The material of the conductive layer (102) is aluminum or aluminum alloy, and the conductive layer (102) has a density of 2.5 g/cm3-2.8 g/cm3. The electrode active material layer (11) contains an electrode active material, a binder and a conductive agent, and the binder in the electrode active material layer (11) has an uneven distribution in the thickness direction; on the basis of the total weight of the electrode active material layer (11), the weight percentage of the binder in an inner side region of the electrode active material layer (11) is greater than the weight percentage of the binder in an outer side region of the electrode active material layer (11).

Inventors:

LI JING (CN)
XUE QINGRUI (CN)
LI WEI (CN)
ZHANG ZIGE (CN)
ZHANG YANG (CN)
YANG XIANWEI (CN)

Application Number:

PCT/CN2019/129363

Publication Date:

January 07, 2021

Filing Date:

December 27, 2019

Export Citation:

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Assignee:

CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

International Classes:

H01M4/62

Domestic Patent References:

WO2014083950A1

2014-06-05

Foreign References:

CN109873164A	2019-06-11
CN109037592A	2018-12-18
CN109873161A	2019-06-11
CN101960652A	2011-01-26
CN109004171A	2018-12-14
CN104704652A	2015-06-10
CN108390066A	2018-08-10

Other References: