Title:
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND BATTERY PACK
Document Type and Number:
Japanese Patent JP2015088466
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode active material for nonaqueous electrolyte secondary batteries of long life.SOLUTION: A negative electrode for nonaqueous electrolyte secondary batteries according to an embodiment comprises: a collector; and a negative electrode mixture layer arranged on the collector, and including a negative electrode active material, a conductive material and a binder. The negative electrode active material consists of complex particles which have a carbonaceous material, a silicon oxide phase in the carbonaceous material, and a silicon phase having crystalline silicon in the silicon oxide phase. The negative electrode active material satisfies the following relation: d/d≥0.9, where dis an average thickness of the mixture layer, and dis a maximum thickness of the particles exclusively of the negative electrode active material in the mixture layer occupied by the particles in a direction vertical to a collector surface.
Inventors:
HOTTA YASUYUKI
KUBOKI TAKASHI
MORITA TOMOKAZU
FUKAZAWA TAKAYUKI
KOSHIZAKI KENJI
OSADA NORIKAZU
KUBOKI TAKASHI
MORITA TOMOKAZU
FUKAZAWA TAKAYUKI
KOSHIZAKI KENJI
OSADA NORIKAZU
Application Number:
JP2014175036A
Publication Date:
May 07, 2015
Filing Date:
August 29, 2014
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H01M4/13; H01M4/36; H01M4/48; H01M4/66
Attorney, Agent or Firm:
Tetsuma Ikegami
Akira Sudo
Mitsuyuki Matsuyama
Akira Sudo
Mitsuyuki Matsuyama