Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING NEGATIVE ELECTRODE ACTIVE MATERIAL AND METHOD FOR MANUFACTURING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2014/192225
Kind Code:
A1
Abstract:
The present invention is a negative electrode active material for nonaqueous electrolyte secondary batteries, which is composed of a mixture of a silicon-containing material and a carbon-based material and is capable of doping and dedoping of lithium, and wherein the crystallite size of silicon contained in the silicon-containing material is 10 nm or less as calculated using Scherrer's equation on the basis of the half width of the diffraction peak belonging to Si(220) in an X-ray diffraction. Consequently, this negative electrode active material is able to maintain the utilization rate of the silicon-containing material high during charging and discharging of a nonaqueous electrolyte secondary battery in cases where a silicon-containing material and a carbon-based material are used in the form of a mixture as a negative electrode active material for the nonaqueous electrolyte secondary battery.
Inventors:
YOSHIKAWA HIROKI (JP)
KAMO HIROMICHI (JP)
KAMO HIROMICHI (JP)
Application Number:
PCT/JP2014/002389
Publication Date:
December 04, 2014
Filing Date:
May 01, 2014
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
H01M4/587; H01M4/36; H01M4/38; H01M4/48
Domestic Patent References:
| WO2012018035A1 | 2012-02-09 | |||
| WO2007072704A1 | 2007-06-28 |
Foreign References:
| JP2013073764A | 2013-04-22 | |||
| JP2010073651A | 2010-04-02 | |||
| JP2004319469A | 2004-11-11 | |||
| JP2009181767A | 2009-08-13 | |||
| JP2008123814A | 2008-05-29 |
Attorney, Agent or Firm:
YOSHIMIYA, Mikio (JP)
Good Miya Mikio (JP)
Good Miya Mikio (JP)
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