Title:
NEGATIVE ELECTRODE MATERIAL FOR POWER STORAGE DEVICE
Document Type and Number:
Japanese Patent JP2018166058
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a material for making it possible to obtain a negative electrode 12 that has large power storage capacity and inhibits the power storage capacity from being reduced by repetition of charging and discharging.SOLUTION: A negative electrode material includes matrices composed of metal glass containing Fe or Ni; and Si primary phases distributed to the matrices. In the Si primary phases, each Si crystallite size is 20nm or less. The Si primary phases contain one type or two or more types selected from a group consisting of Ge, Al and B. The total percentage content of Ge, Al and B in the negative electrode material is equal to or higher than 0.01 mass.% and equal to or lower than 5.0 mass.%. A ratio of the Si primary phases in the negative electrode material is equal to or higher than 20 mass.% and equal to or lower than 80 mass.%.SELECTED DRAWING: Figure 2
Inventors:
HIRONO TOMOKI
TAKASU ICHIRO
TAKASU ICHIRO
Application Number:
JP2017062766A
Publication Date:
October 25, 2018
Filing Date:
March 28, 2017
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
H01M4/38; B22F1/08; C22C30/00; C22C45/02; C22C45/04; H01G11/30
Attorney, Agent or Firm:
Kengo Oka
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura
Hiroomi Nakao