Title:
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND METHOD FOR PRODUCING NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES
Document Type and Number:
WIPO Patent Application WO/2022/219836
Kind Code:
A1
Abstract:
The present invention provides a negative electrode material for lithium ion secondary batteries that have excellent high-rate charge and discharge characteristics and excellent initial efficiency. A negative electrode material for lithium ion secondary batteries, the negative electrode material being composed of composite graphite particles that are obtained by specific steps, which are: a first coating step for coating graphite oxide particles with an organic binder; a step for forming amorphous carbon particle-adhered graphite oxide particles, in said step amorphous carbon particles being adhered to the organic binder; a second coating step for obtaining graphite oxide particles, each of which has an amorphous carbon particle-containing layer in the surface, by coating the amorphous carbon particles with an organic binder; and a burning carbonization step in which the graphite oxide particles, each of which has an amorphous carbon particle-containing layer in the surface, are subjected to burning carbonization.
Inventors:
TAKIZAWA KENTARO (JP)
NAKAMURA AKIRA (JP)
KAGEYAMA MASAYA (JP)
NAKAMURA AKIRA (JP)
KAGEYAMA MASAYA (JP)
Application Number:
PCT/JP2021/041877
Publication Date:
October 20, 2022
Filing Date:
November 15, 2021
Export Citation:
Assignee:
TOKAI CARBON KK (JP)
International Classes:
H01M4/36; H01M4/583
Foreign References:
| JP2008305722A | 2008-12-18 | |||
| JP2003272625A | 2003-09-26 | |||
| JP2018163833A | 2018-10-18 | |||
| JP2010218758A | 2010-09-30 | |||
| US20180219216A1 | 2018-08-02 |
Attorney, Agent or Firm:
ASHITABA INTERNATIONAL PATENT OFFICE (JP)
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