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Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, AND METHOD FOR MANUFACTURING NEGATIVE ELECTRODE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/065200
Kind Code:
A1
Abstract:
The present invention provides a negative electrode active material which contains negative electrode active material particles, characterized in that the negative electrode active material particles contain silicon compound particles that contain a silicon compound containing oxygen, at least a part of the surface of each silicon compound particle is covered with a carbon layer, and the silicon compound particles contain Li6Si2O7 and Li2SiO3. As a result of this configuration, a negative electrode active material capable of increasing battery capacity due to improved initial efficiency and capable of achieving satisfactory battery cycle characteristics is provided.

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Inventors:
HIROSE TAKAKAZU (JP)
OSAWA YUSUKE (JP)
FURUYA MASAHIRO (JP)
SAKAI REIKO (JP)
TAKAHASHI KOHTA (JP)
MATSUNO TAKUMI (JP)
Application Number:
PCT/JP2020/030159
Publication Date:
April 08, 2021
Filing Date:
August 06, 2020
Export Citation:
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Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
H01M4/485; C01B33/32; H01M4/36
Domestic Patent References:
WO2015198511A12015-12-30
WO2013168727A12013-11-14
WO2017208627A12017-12-07
WO2016121321A12016-08-04
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Other References:
A. HOHLT. WIEDERP. A. VAN AKENT. E. WEIRICHG. DENNINGERM. VIDALS. OSWALDC. DENEKEJ. MAYERH. FUESS, J. NON-CRYST. SOLIDS, vol. 320, 2003, pages 255
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MARIKO MIYACHIHIRONORI YAMAMOTOHIDEMASA KAWAI, J. ELECTROCHEM. SOC., vol. 154, 2007
M. YAMADAA. INABAA. UEDAK. MATSUMOTOT. IWASAKIT. OHZUKU, J. ELECTROCHEM. SOC.
TAEAHN KIMSANGJIN PARKSEUNG M, OH, J. ELECTROCHEM. SOC., vol. 154, 2007, pages A1112 - A1117
HYE JIN KIMSUNGHUN CHOISEUNG JONG LEEMYUNG WON SEOJAE GOO LEEERHAN DENIZYONG JU LEEEUN KYUNG KIMJANG WOOK CHOI, NANO LETT, vol. 16, 2016, pages 282 - 288
See also references of EP 4040540A4
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
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