发明公开
- 专利标题: Double current collector negative electrode design for alkali metal ion electrochemical cells
- 专利标题(中): 负面的电子邮件电子邮件
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申请号: EP01127533.6申请日: 2001-11-18
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公开(公告)号: EP1207571A2公开(公告)日: 2002-05-22
- 发明人: Gan, Hong , Rubino, Robert S. , Takeuchi, Esther S.
- 申请人: WILSON GREATBATCH LTD.
- 申请人地址: 10,000 Wehrle Drive Clarence New York 14031 US
- 专利权人: WILSON GREATBATCH LTD.
- 当前专利权人: WILSON GREATBATCH LTD.
- 当前专利权人地址: 10,000 Wehrle Drive Clarence New York 14031 US
- 代理机构: Koepe, Gerd L., Dipl.-Chem.
- 优先权: US249688P 20001117; US8977 20011108
- 主分类号: H01M4/02
- IPC分类号: H01M4/02 ; H01M4/36 ; H01M4/66 ; H01M10/40
摘要:
A new sandwich negative electrode design for a secondary cell is provided comprising a "sacrificial" alkali metal along with a carbonaceous anode material. In the case of a hard carbon anode material, the sacrificial alkali metal is preferably lithium and is sized to compensate for the initial irreversible capacity of this anode material. Upon activating the cells, the lithium metal automatically intercalates into the hard carbon anode material. That way, the sacrificial lithium is consumed and compensates for the generally unacceptable irreversible capacity of hard carbon. The superior cycling longevity of hard carbon now provides a secondary cell of extended use beyond that know for conventional secondary cells having only graphitic anode materials.
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