发明授权
- 专利标题: Preloading lithium ion cell components with lithium
- 专利标题(中): 用锂预加载锂离子电池组件
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申请号: US12944593申请日: 2010-11-11
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公开(公告)号: US08846251B2公开(公告)日: 2014-09-30
- 发明人: Yi Cui , Song Han , Mark C. Platshon
- 申请人: Yi Cui , Song Han , Mark C. Platshon
- 申请人地址: US CA Sunnyvale
- 专利权人: Amprius, Inc.
- 当前专利权人: Amprius, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 代理机构: Weaver Austin Villeneuve & Sampson LLP
- 主分类号: H01M4/13
- IPC分类号: H01M4/13 ; H01M4/58
摘要:
Provided are novel negative electrodes for use in lithium ion cells. The negative electrodes include one or more high capacity active materials, such as silicon, tin, and germanium, and a lithium containing material prior to the first cycle of the cell. In other words, the cells are fabricated with some, but not all, lithium present on the negative electrode. This additional lithium may be used to mitigate lithium losses, for example, due to Solid Electrolyte Interphase (SEI) layer formation, to maintain the negative electrode in a partially charged state at the end of the cell discharge cycle, and other reasons. In certain embodiments, a negative electrode includes between about 5% and 25% of lithium based on a theoretical capacity of the negative active material. In the same or other embodiments, a total amount of lithium available in the cell exceeds the theoretical capacity of the negative electrode active material.
公开/授权文献
- US20110111304A1 PRELOADING LITHIUM ION CELL COMPONENTS WITH LITHIUM 公开/授权日:2011-05-12
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