Title:
BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/098743
Kind Code:
A1
Abstract:
The present application relates to a battery, comprising a positive electrode sheet, a separator, and a negative electrode sheet; the positive electrode sheet comprises a positive current collector and at least two positive active material layers coated on at least one surface of the positive current collector; a lower positive active material layer that is in contact with the positive current collector comprises a first positive active material, a first polymer material, and a first conductive material; on the basis of the total weight of the lower positive active material layer, the weight percent of the first positive active material is A%, the weight percent of the first polymer material is B%, and the weight percent of the first conductive material is C%; an upper positive active material layer that is in contact with the lower positive active material layer and that is far from the positive current collector comprises a second positive active material, a second polymer material, and a second conductive material; on the basis of the total weight of the upper positive active material layer, the weight percent of the second positive active material is A'%, the weight percent of the second polymer material is B'%, and the weight percent 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 is safe and has improved electrical performance.
Inventors:
ZENG YUQUN (CN)
LIN YONGSHOU (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
ZHANG XIAOWEN (CN)
LIN YONGSHOU (CN)
LI ZHENHUA (CN)
JIN HAIZU (CN)
ZHANG XIAOWEN (CN)
Application Number:
PCT/CN2019/118492
Publication Date:
May 22, 2020
Filing Date:
November 14, 2019
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; H01M4/66
Foreign References:
| CN109755467A | 2019-05-14 | |||
| CN102187497A | 2011-09-14 | |||
| CN101471435A | 2009-07-01 | |||
| JP2008027633A | 2008-02-07 | |||
| CN1658413A | 2005-08-24 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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