Title:
NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/184713
Kind Code:
A1
Abstract:
The present invention is a negative electrode for lithium ion secondary batteries, which is provided with a negative electrode active material layer that contains a negative electrode active material and a binder, and which is configured such that: the negative electrode active material contains an Si-based material; the binder contains a solid polymer electrolyte; and the content of the solid polymer electrolyte in the negative electrode active material layer is 25-85 parts by mass relative to 100 parts by mass of the total content of the Si-based material and the solid polymer electrolyte. A lithium ion secondary battery according to the present invention is provided with a positive electrode and the negative electrode for lithium ion secondary batteries according to the present invention. Consequently, the present invention is able to provide: a negative electrode for lithium ion secondary batteries, which contains an Si-based material, and which is capable of increasing the capacity of a lithium ion secondary battery, while improving the charge/discharge cycle characteristics; and a lithium ion secondary battery which is provided with this negative electrode for lithium ion secondary batteries.
Inventors:
SUZUKI AKIHIRO (JP)
Application Number:
PCT/JP2020/011190
Publication Date:
September 17, 2020
Filing Date:
March 13, 2020
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD (JP)
International Classes:
H01M4/13; H01M4/133; H01M4/36; H01M4/48; H01M4/62
Domestic Patent References:
| WO2017168947A1 | 2017-10-05 |
Foreign References:
| US20150228980A1 | 2015-08-13 | |||
| JP2011018575A | 2011-01-27 | |||
| CN104617254A | 2015-05-13 |
Attorney, Agent or Firm:
TAGUCHI, Masahiro et al. (JP)
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