Invention Grant
US08026004B2 Negative active material for a rechargeable lithium battery, method for preparing the same, and rechargeable lithium battery including the same
有权
用于可再充电锂电池的负极活性材料，其制备方法以及包括其的可再充电锂电池
- Patent Title: Negative active material for a rechargeable lithium battery, method for preparing the same, and rechargeable lithium battery including the same
- Patent Title (中): 用于可再充电锂电池的负极活性材料，其制备方法以及包括其的可再充电锂电池
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Application No.: US11641947Application Date: 2006-12-20
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Publication No.: US08026004B2Publication Date: 2011-09-27
- Inventor: Akira Takamuku , Sung-Soo Kim
- Applicant: Akira Takamuku , Sung-Soo Kim
- Applicant Address: KR Suwon-si, Gyeonggi-do
- Assignee: Samsung SDI Co., Ltd.
- Current Assignee: Samsung SDI Co., Ltd.
- Current Assignee Address: KR Suwon-si, Gyeonggi-do
- Agency: Lee & Morse, P.C.
- Priority: JP2005-367912 20051221
- Main IPC: H01M4/48
- IPC: H01M4/48 ; C01G31/02
Abstract:
A negative active material for a rechargeable lithium battery may include a compound powder represented by the following formula 1 LixMyVzO2+d [Formula 1] where 1≦x≦2.5, 0≦y≦0.5, 0.5≦z≦1.5, 0≦d≦0.5, and M is an element selected from Al, Cr, Mo, Ti, W, Zr, and combinations thereof. The compound powder may include a multi-faced particle that has a plurality of flattened parts on a particle surface at the plan view of the multi-faced particle. The multi-faced particle may have at least three ridgelines at a boundary between adjacent flattened parts. At least one of the ridgeline may be formed by adjacent flattened parts having an angle of at least 90°. A ratio of a length (L) of each ridgeline and the maximum diameter (Rmax) of the multi-faced particle may be greater than 0.1.
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