Title:
Si-BASED-ALLOY ANODE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/115223
Kind Code:
A1
Abstract:
Disclosed is an Si-based-alloy anode material for a lithium ion secondary battery. The Si-based-alloy anode material comprises an alloy phase configured from an Si primary phase comprising Si, and a compound phase comprising at least two elements. The at least two elements include: at least one first added element (A) selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, and Mg; and at least one low-melting-point second added element (B) selected from the group consisting of S, Se, Te, Sn, In, Ga, Pb, Bi, Zn, Al, and Ag. The compound phase: (i) contains a first compound phase comprising Si and a first added element (A), a second compound phase comprising a first added element (A) and a second added element (B), and a single phase of a second added element (B) and/or a third compound phase comprising at least two second added elements (B); or (ii) a compound phase comprising Si and a first added element (A), and a single phase of a second added element (B) and/or a compound phase comprising at least two second added elements (B). The average minor axis width of the Si primary phase is no greater than 4 μm. By means of the anode material, it is possible to provide a secondary battery having favorable charging/discharging capacity and cycle life.
Inventors:
HIRONO TOMOKI (JP)
KARIYA TETSURO (JP)
SAWADA TOSHIYUKI (JP)
KARIYA TETSURO (JP)
SAWADA TOSHIYUKI (JP)
Application Number:
PCT/JP2013/051994
Publication Date:
August 08, 2013
Filing Date:
January 30, 2013
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD (JP)
International Classes:
H01M4/38
Foreign References:
| JP2010519718A | 2010-06-03 | |||
| JP2007172954A | 2007-07-05 | |||
| JP2005011650A | 2005-01-13 | |||
| JP4739462B1 | 2011-08-03 | |||
| JP4865105B1 | 2012-02-01 | |||
| JP2012178344A | 2012-09-13 | |||
| JP2012150910A | 2012-08-09 | |||
| JP2001297757A | 2001-10-26 | |||
| JP2004228059A | 2004-08-12 | |||
| JP2005044672A | 2005-02-17 |
Other References:
See also references of EP 2811554A4
Attorney, Agent or Firm:
TAKAMURA Masaharu et al. (JP)
Masaharu Takamura (JP)
Masaharu Takamura (JP)
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Claims: