Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/042864
Kind Code:
A1
Abstract:
The disclosed negative electrode active material for secondary batteries comprises silicate composite particles that contain a silicate phase and silicon particles dispersed in the silicate phase. The peak in the energy-loss near-edge structure (ELNES) for the oxygen K-edge for the silicate phase/silicon particle interface is shifted 2.0 eV to 3.0 eV to the lower energy side relative to the peak in the energy-loss near-edge structure for the oxygen K-edge for the silicate phase. A secondary battery having excellent charge/discharge cycle characteristics can be realized by using the negative electrode active material according to the present invention.
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Inventors:
ASANO TAISUKE
KAMIDAIRA TOSHIKI
SATO YOSUKE
KAMIDAIRA TOSHIKI
SATO YOSUKE
Application Number:
PCT/JP2022/034462
Publication Date:
March 23, 2023
Filing Date:
September 14, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/38; C01B33/02; C01B33/26; C01B33/32; H01M4/36
Domestic Patent References:
| WO2019130787A1 | 2019-07-04 |
Foreign References:
| JP2017091978A | 2017-05-25 | |||
| JP2018152250A | 2018-09-27 | |||
| US20210111395A1 | 2021-04-15 | |||
| JP2015153520A | 2015-08-24 |
Attorney, Agent or Firm:
KAWASAKI & PARTNERS (JP)
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