专利名称：AUXILIARY ELECTRODES FOR
ELECTROCHEMICAL CELLS CONTAININGHIGH CAPACITY ACTIVE MATERIALS
发明人：Constantin I. Stefan,Rainer J.
Fasching,Gregory Alan Roberts,RyanKottenstette,Song Han,Ghyrn E. Loveness
申请号：US13245530申请日：20110926
公开号：US20120045670A1公开日：20120223
专利附图：
摘要：Provided are novel electrochemical cells that include positive electrodes,negative electrodes containing high capacity active materials such as silicon, and auxiliaryelectrodes containing lithium. An auxiliary electrode is provided in the cell at least priorto its formation cycling and is used to supply lithium to the negative electrode. Theauxiliary electrode may be then removed from the cell prior or after formation. Thetransfer of lithium to the negative electrode may be performed using a differentelectrolyte, a higher temperature, and/or a slower rate than during later operationalcycling of the cell. After this transfer, the negative electrode may remain pre-lithiatedduring later cycling at least at a certain predetermined level. This pre-lithiation helps tocycle the cell at more optimal conditions and to some degree maintain this cyclingperformance over the operating life of the cell. Also provided are methods of fabricatingsuch cells.
申请人：Constantin I. Stefan,Rainer J. Fasching,Gregory Alan Roberts,RyanKottenstette,Song Han,Ghyrn E. Loveness
地址：San Jose CA US,Mill Valley CA US,Oakland CA US,Los Altos CA US,Foster City CAUS,East Palo Alto CA US
国籍：US,US,US,US,US,US
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