Title:
ELECTROCHEMICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/098789
Kind Code:
A1
Abstract:
Provided is an electrochemical device. The electrochemical device comprises a positive electrode sheet, a negative electrode sheet, and electrolyte, the positive electrode sheet comprises a current collector (10), a positive electrode active material layer (14), and a safety coating (12) disposed between the current collector (10) and the positive electrode active material layer (14), the safety coating (12) comprises a polymer matrix, a conductive material and an inorganic filler; relative to the total weight of the polymer matrix, the conductive material and the inorganic filler, the weight percentage of the polymer matrix is 35 wt% to 75 wt%, the weight percentage of the conductive material is 5 wt% to 25 wt%, and the weight percentage of the inorganic filler is 10 wt% to 60 wt%; the inorganic filler is an electrochemically active material or a material of a conductive carbon-coated modification, a conductive metal-coated modification or a conductive polymer-coated modification of the electrochemically active material, and the normal temperature viscosity of the electrolyte is ≤ 4cp. The electrochemical device (for example, a capacitor, a primary battery or a secondary battery, and the like) has improved safety performance and electrical performance.
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Inventors:
ZHANG XIAOWEN (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
Application Number:
PCT/CN2019/118828
Publication Date:
May 22, 2020
Filing Date:
November 15, 2019
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; C09D127/16; H01M4/06; H01M10/0525; H01M10/42
Foreign References:
| CN107004858A | 2017-08-01 | |||
| CN102344598A | 2012-02-08 | |||
| CN103259020A | 2013-08-21 | |||
| CN104377342A | 2015-02-25 | |||
| US6150051A | 2000-11-21 |
Other References:
See also references of EP 3742528A4
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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