Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERIES, NEGATIVE ELECTRODE FOR SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2015095301
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode active material for nonaqueous electrolyte secondary batteries high in capacity and superior in cycle characteristics.SOLUTION: A negative electrode active material for secondary batteries comprises particles including a silicide matrix and silicon domains distributed in a silicide matrix. In the negative electrode active material for secondary batteries, the volume percentage of the silicon domains is 40-70 vol.%. The negative electrode active material for secondary batteries includes regions A in which the silicon domains having an envelope diameter of less than 300 nm are distributed, and regions B in which the silicon domains having an envelope diameter of 300 nm or more are distributed.
Inventors:
MATSUSHITA MASA
NISHIKUBO HIDEO
NISHIMURA TAKESHI
HIGAMI TOSHIYA
UCHIKOSHI AKINARI
OMIGAWA YU
YAMAZAKI SATOSHI
NISHIKUBO HIDEO
NISHIMURA TAKESHI
HIGAMI TOSHIYA
UCHIKOSHI AKINARI
OMIGAWA YU
YAMAZAKI SATOSHI
Application Number:
JP2013232733A
Publication Date:
May 18, 2015
Filing Date:
November 11, 2013
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD
International Classes:
H01M4/38; H01M4/1395; H01M4/36
Attorney, Agent or Firm:
Seiichi Inoue