Title:
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES USING SAME, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2013/146658
Kind Code:
A1
Abstract:
The present invention addresses the problem of achieving a negative electrode material for lithium ion secondary batteries, which provides high capacity and good cycle characteristics. As a solution for the problem, the present invention uses a negative electrode material for lithium ion secondary batteries, which is characterized by containing porous particles that have a silicon phase and a compound phase of silicon and a metal D, and which is also characterized in that the porosity of the porous particles is 0.1-75% by volume. This negative electrode material for lithium ion secondary batteries is produced by a production method which comprises: a step (a) wherein silicon, aluminum and a metal D are melted; a step (b) wherein the alloy melt of the molten silicon, the molten aluminum and the molten metal D is cooled at 100 K/sec or more, thereby forming alloy particles; and a step (c) wherein the alloy particles are immersed in an aqueous alkaline solution, thereby eluting some or all of the aluminum.
Inventors:
NISHIMURA TAKESHI (JP)
UCHIKOSHI AKINARI (JP)
NAKAMURA KENICHI (JP)
NISHIKUBO HIDEO (JP)
HIKAMI TOSHIYA (JP)
UCHIKOSHI AKINARI (JP)
NAKAMURA KENICHI (JP)
NISHIKUBO HIDEO (JP)
HIKAMI TOSHIYA (JP)
Application Number:
PCT/JP2013/058534
Publication Date:
October 03, 2013
Filing Date:
March 25, 2013
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
H01M4/38; C22C1/08; C22C29/18
Domestic Patent References:
| WO2010128310A1 | 2010-11-11 | |||
| WO2012036265A1 | 2012-03-22 |
Foreign References:
| JP2004214054A | 2004-07-29 | |||
| JP2005071771A | 2005-03-17 | |||
| JP2006049266A | 2006-02-16 |
Attorney, Agent or Firm:
INOUE, SEIICHI (JP)
Seiichi Inoue (JP)
Seiichi Inoue (JP)
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