Title:
CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2011/155770
Kind Code:
A2
Abstract:
The present invention relates to a cathode active material for a lithium secondary battery and a lithium secondary battery provided with same. The cathode active material for the lithium secondary battery of the present invention includes a silicon and a silicon alloy made from at least two metals, each of the metals having no more than -23KJ/mol heat of mixing with the silicon. The cathode active material for the lithium secondary battery of the present invention has large volume and thus is useful for manufacturing a high-volume lithium secondary battery. Also, the cathode active material for the lithium secondary battery of the present invention has a very small silicon crystal phase, which results in little volume change of the cathode active material when charging/discharging, thereby providing superior cycling properties when applied to a battery.
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Inventors:
JUNG DONG-SUB (KR)
KIM KI-TAE (KR)
KIM JE-YOUNG (KR)
JI HYE-MIN (KR)
KIM KI-TAE (KR)
KIM JE-YOUNG (KR)
JI HYE-MIN (KR)
Application Number:
PCT/KR2011/004210
Publication Date:
December 15, 2011
Filing Date:
June 08, 2011
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
JUNG DONG-SUB (KR)
KIM KI-TAE (KR)
KIM JE-YOUNG (KR)
JI HYE-MIN (KR)
JUNG DONG-SUB (KR)
KIM KI-TAE (KR)
KIM JE-YOUNG (KR)
JI HYE-MIN (KR)
International Classes:
H01M4/38; H01M4/134; H01M10/052
Foreign References:
| EP0750359A2 | 1996-12-27 | |||
| US20030157407A1 | 2003-08-21 | |||
| US20060127773A1 | 2006-06-15 | |||
| US20080081260A1 | 2008-04-03 | |||
| KR20090105868A | 2009-10-07 |
Other References:
See references of EP 2581969A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
특허법인 필앤온지 (KR)
특허법인 필앤온지 (KR)
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Claims: