Title:
CARBON-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM-ION SECONDARY BATTERY, AND LITHIUM-ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/021957
Kind Code:
A1
Abstract:
Provided are carbon-coated graphite particles having excellent battery characteristics when used as a negative electrode material in a lithium-ion secondary battery. The carbon-coated graphite particles each comprise a graphite particle and a carbon coating which coats at least a portion of the surface of the graphite particle. The specific surface area SBET found using the BET method is 4.0-15.0 m2/g. The pore volume VS corresponding to pores having a pore size from 7.8-36.0 nm is from 0.001-0.026 cm3/g. In a pore size distribution diagram obtained by plotting pore size on the horizontal axis and plotting dV/dP, which is a value obtained by differentiating the pore volume by the pore size, on the vertical axis, the pore size Pmax at which the dV/dP is greatest is from 2.5-5.5 nm.
Inventors:
SUTO MIKITO (JP)
FUSHIWAKI YUSUKE (JP)
MATSUZAKI AKIRA (JP)
YAMAJI RYOTA (JP)
HAGA RYUTA (JP)
FUSHIWAKI YUSUKE (JP)
MATSUZAKI AKIRA (JP)
YAMAJI RYOTA (JP)
HAGA RYUTA (JP)
Application Number:
PCT/JP2022/029171
Publication Date:
February 23, 2023
Filing Date:
July 28, 2022
Export Citation:
Assignee:
JFE CHEMICAL CORP (JP)
JFE STEEL CORP (JP)
JFE STEEL CORP (JP)
International Classes:
C01B32/20; H01M4/36; H01M4/587
Domestic Patent References:
| WO2018043375A1 | 2018-03-08 | |||
| WO2010013487A1 | 2010-02-04 | |||
| WO2011052452A1 | 2011-05-05 |
Foreign References:
| JP2011029408A | 2011-02-10 | |||
| JP2019019048A | 2019-02-07 | |||
| JP2014089887A | 2014-05-15 | |||
| JP2021138810A | 2021-09-16 | |||
| JP2016004691A | 2016-01-12 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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