Title:
LITHIUM ION SECONDARY BATTERY NEGATIVE ELECTRODE MATERIAL AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/031597
Kind Code:
A1
Abstract:
A lithium ion secondary battery negative electrode material comprising a carbon-coated composite material containing: a composite material containing silicon-containing particles, graphite particles, and amorphous carbon; and additional amorphous carbon coating the composite material. The carbon-coated composite material is such that: with respect to the total of the area (A) of a peak around 396 to 400 eV, the area (B) of a peak around 283 to 288 eV, and the area (C) of a peak around 530 to 536 eV as observed by X-ray photoelectron spectroscopy (XPS), the ratio of a peak area (D) around 99 to 105 eV, or D/(A + B + C), is not more than 0.015; and the ratio of a BET specific surface area S to a specific surface area T calculated by spherical approximation on the basis of a volume-based accumulated grain size distribution measured by laser diffractometry, or S/T, is not more than 7.3.
Inventors:
ISHII NOBUAKI (JP)
ITO YUJI (JP)
OKAMURA SHOTA (JP)
ITO YUJI (JP)
OKAMURA SHOTA (JP)
Application Number:
PCT/JP2018/030023
Publication Date:
February 14, 2019
Filing Date:
August 10, 2018
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
H01M4/38; H01M4/36; H01M4/48; H01M4/587
Domestic Patent References:
| WO2013099263A1 | 2013-07-04 | |||
| WO2013094668A1 | 2013-06-27 | |||
| WO2012141166A1 | 2012-10-18 | |||
| WO2014007161A1 | 2014-01-09 | |||
| WO2012000858A1 | 2012-01-05 | |||
| WO2014003135A1 | 2014-01-03 |
Foreign References:
| JP2016126976A | 2016-07-11 | |||
| JP2014519135A | 2014-08-07 | |||
| JP2013101920A | 2013-05-23 | |||
| JP2004119176A | 2004-04-15 | |||
| JP2015185491A | 2015-10-22 | |||
| JP2016167352A | 2016-09-15 | |||
| JP2004259475A | 2004-09-16 | |||
| JP2008112710A | 2008-05-15 | |||
| JP2002231225A | 2002-08-16 |
Other References:
"117th Committee material 117-71-A-1(1963) Japan Society for the Promotion of Science", 117TH COMMITTEE MATERIAL 117-121-C-5 (1972) JAPAN SOCIETY FOR THE PROMOTION OF SCIENCE, AND ''CARBON, vol. 36, 1963, pages 25 - 34
CARBON, vol. 43, 2005, pages 1731
CARBON, vol. 43, 2005, pages 1731
Attorney, Agent or Firm:
KIKUMA, Tadayuki (JP)
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