Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/262436
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to improve the cycle characteristics of a secondary battery that uses an Si-based active material containing Si. A negative electrode active material (Si-based active material) for secondary batteries according to one embodiment of the present invention comprises core particles, each of which is obtained by dispersing Si particles in a silicon oxide phase or a silicate phase, and a carbon material that adheres to the surfaces of the core particles. If a D/G ratio is the ratio of the peak intensity of the D-band to the peak intensity of the G-band in the Raman spectrum, the carbon material contains a first carbon material that has a D/G ratio of from 0.8 to 2 and a second carbon material that has a D/G ratio of from 0.01 to 0.5. The D/G ratio of the carbon material is from 0.2 to 0.9.
Inventors:
KOIZUMI ISAO
IWAMI YASUNOBU
MORIKAWA TAKAHARU
IWAMI YASUNOBU
MORIKAWA TAKAHARU
Application Number:
PCT/JP2020/024744
Publication Date:
December 30, 2020
Filing Date:
June 24, 2020
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H01M4/36; H01M4/38; H01M4/48; H01M4/58
Domestic Patent References:
| WO2018203599A1 | 2018-11-08 | |||
| WO2016136178A1 | 2016-09-01 | |||
| WO2015098024A1 | 2015-07-02 |
Foreign References:
| JP2012523674A | 2012-10-04 | |||
| JP2015210962A | 2015-11-24 | |||
| JP2018032648A | 2018-03-01 | |||
| JP2000215887A | 2000-08-04 | |||
| JP2000272911A | 2000-10-03 |
Other References:
See also references of EP 3993103A4
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
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