Title:
BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/098784
Kind Code:
A1
Abstract:
Provided is a battery (5), comprising a positive electrode sheet, a separator, a negative electrode sheet and an electrolyte, wherein the positive electrode sheet comprises a positive electrode current collector (10) and at least two positive electrode active material layers coated on at least one surface of the positive electrode current collector (10); a lower positive electrode active material layer (12) in contact with the positive electrode current collector (10) comprises a first positive electrode active material, a first polymer material and a first conductive material, based on the total weight of the lower positive electrode active material layer (12), the weight percentage content of the first positive electrode active material is A%, the weight percentage content of the first polymer material is B%, and the weight percentage content of the first conductive material is C%; an upper positive electrode active material layer (14) in contact with the lower positive electrode active material layer (12) and away from the positive electrode current collector (10) comprises a second positive electrode active material, a second polymer material and a second conductive material, based on the total weight of the upper positive electrode active material layer (14), the weight percentage content of the second positive electrode active material is A '%, the weight percentage content of the second polymer material is B'%, and the weight percentage content of the second conductive material is C '%, wherein A% B '%, C% ≥C'%, and the first polymer material comprises fluorinated polyolefin and/or chlorinated polyolefin polymer material. The battery (5) has good safety, improved electrical performance, and the normal temperature viscosity of the electrolyte is ≤4cp.
Inventors:
ZHANG XIAOWEN (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
Application Number:
PCT/CN2019/118792
Publication Date:
May 22, 2020
Filing Date:
November 15, 2019
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M10/0525; H01M4/13; H01M4/62
Foreign References:
| JP2013062105A | 2013-04-04 | |||
| JP2013062105A | 2013-04-04 | |||
| CN101471435A | 2009-07-01 | |||
| CN201153140Y | 2008-11-19 | |||
| CN107644968A | 2018-01-30 | |||
| CN108539252A | 2018-09-14 | |||
| CN1989637A | 2007-06-27 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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