发明授权
- 专利标题: Materials for negative electrodes of lithium ion batteries
- 专利标题(中): 锂离子电池负极材料
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申请号: US11137900申请日: 2005-05-25
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公开(公告)号: US07524586B2公开(公告)日: 2009-04-28
- 发明人: Wenfeng Jiang , Junqing Dong
- 申请人: Wenfeng Jiang , Junqing Dong
- 申请人地址: CN Shenzhen
- 专利权人: BYD Company Limited
- 当前专利权人: BYD Company Limited
- 当前专利权人地址: CN Shenzhen
- 代理机构: Venture Pacific Law, PC
- 优先权: CN200410051183 20040817
- 主分类号: H01M4/58
- IPC分类号: H01M4/58 ; H01M4/62 ; H01B1/04 ; B05D5/12 ; B32B15/00
摘要:
The present invention provides materials for negative electrodes of lithium rechargeable batteries. These materials include lithium alloy composites. Each lithium alloy composite has a core-shell structure with one or more lithium alloy granules as its core and a carbon material as its shell. The average granule diameter of the lithium alloy granule is between 5 μm and 40 μm. The average thickness of the shell layer is between 50 Å and 1000 Å. The average diameter of the lithium alloy composite is between 10 μm to 50 μm. The methods of fabrication for the material includes the following steps: stirring lithium alloy granules in an organic solution with a coating substance, drying the solid product in the organic solution with a coating substance, calcining the dried product to obtain the negative electrode material with lithium alloy composites.
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