Title:
POLYPHENYLENE SULFIDE POWDER FOR LITHIUM ION BATTERY BINDER, BINDER FOR LITHIUM ION BATTERY NEGATIVE ELECTRODE, SLURRY FOR FORMING LITHIUM ION BATTERY NEGATIVE ELECTRODE MIXTURE LAYER, LITHIUM ION BATTERY NEGATIVE ELECTRODE, AND LITHIUM ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/220249
Kind Code:
A1
Abstract:
The present invention makes it possible to provide: a binder for a lithium ion battery negative electrode which uses a high capacity active material and which makes it possible to produce a negative electrode having excellent cycle characteristics; and a slurry for forming a lithium ion battery negative electrode mixture layer which uses the same. The present invention also provides a lithium ion battery negative electrode and a lithium ion battery which, by using the same, have excellent charge/discharge characteristics and have a longer cycle life. Provided is a lithium ion battery negative electrode wherein: polyphenylene sulfide having a specific controlled median size is used for a negative electrode binder as a binder to bind a negative electrode active material, an electrically conductive auxiliary agent, and a collector; and the compositional ratio of polyphenylene sulfide in a slurry for forming a negative electrode mixture layer is used suitably. Thus, it is possible to impart excellent charge/discharge characteristics and a longer cycle life to a lithium ion battery.
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Inventors:
TOGO EIICHI (JP)
INOUE HIROSHI (JP)
INOUE HIROSHI (JP)
Application Number:
PCT/JP2022/017639
Publication Date:
October 20, 2022
Filing Date:
April 12, 2022
Export Citation:
Assignee:
TOSOH CORP (JP)
International Classes:
H01M4/13; H01M4/139; H01M4/62
Foreign References:
| JP2003007303A | 2003-01-10 | |||
| JP2006302877A | 2006-11-02 | |||
| JP2020119886A | 2020-08-06 | |||
| JP2006339092A | 2006-12-14 | |||
| JP2019164993A | 2019-09-26 |
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