SILICON-ALLOY NEGATIVE-ELECTRODE MATERIAL EXHIBITING HIGH ELECTRICAL CONDUCTIVITY AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2012/008540

A1

Disclosed is a silicon-alloy negative-electrode material that exhibits high electrical conductivity and both high discharge capacity and a long cycle life. Said negative-electrode material is a powder comprising a composite phase consisting of: a silicon base phase, which is either a silicon phase or a partially-substituted silicon phase in which some silicon has been substituted by one or more elements selected from the group comprising carbon, germanium, tin, lead, aluminum, and phosphorus; and a SixCuy phase comprising an alloy that has the composition SixCuy (x being less than y), i.e. an intermetallic compound of silicon and copper. The silicon base phase comprises particles with a mean diameter of 10 µm or less, and the SixCuy phase encloses at least part of the silicon base phase.

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HIRONO TOMOKI (JP)
KARIYA TETSURO (JP)
YANAGIMOTO KATSU (JP)

PCT/JP2011/066139

January 19, 2012

July 14, 2011

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SANYO SPECIAL STEEL CO LTD (JP)
HIRONO TOMOKI (JP)
KARIYA TETSURO (JP)
YANAGIMOTO KATSU (JP)

H01M4/38; B22F9/08; C22C9/10; C22F1/00; C22F1/08; H01G11/22; H01G11/30; H01M4/36

WO2006129415A1

2006-12-07

JP2004362895A	2004-12-24
JP2001297757A	2001-10-26
JP2007149685A	2007-06-14
JP2009032644A	2009-02-12
JP2005011650A	2005-01-13

KATSUNUMA Hirohito et al. (JP)
Katsunuma Hirohito (JP)

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