An aqueous rechargeable lithium battery based on doping and intercalation mechanisms
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An aqueous rechargeable lithium battery (ARLB) using an electroactive polymer, polypyrrole (PPy), as a negative electrode; a lithium ion intercalation compound LiCoO2 as a positive electrode; and Li2SO4 aqueous solution as an electrolyte and its working mechanism are described. The charge/discharge process is associated with the doping/un-doping of anions at the negative electrode and intercalation/deintercalation of lithium ions at the positive electrode. The average output voltage of the PPy//LiCoO2 battery is about 0.85 V. This battery exhibits excellent cycling performance. This new technology solves the major problem of poor cycling life of ARLBs and will provide a new strategy to explore advanced energy storage and conversion systems.
KeywordsAqueous rechargeable lithium battery (ARLB) LiCoO2 Electroactive polymer Doping/un-doping
Financial support from National Basic Research Program of China (973 Program No: 2007CB209702) and Alexander von Humboldt Foundation (Institutional Program) is greatly appreciated.
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