期刊
JOURNAL OF POWER SOURCES
卷 124, 期 1, 页码 246-253出版社
ELSEVIER
DOI: 10.1016/S0378-7753(03)00611-6
关键词
polyethyleneoxide; solvent-free preparation; hot-pressing; nanocomposite electrolyte membrane; composite LiFePO4 cathode; Li/LiFePO4 polymer cells and batteries
The application and characteristics of hot-pressed, nanocomposite, polyethyleneoxide (PEO)-based electrolyte membranes in all solid-state rechargeable, Li/LiFePO4 polymer cells are presented and discussed. Both electrolyte separators and LiFePO4 composite cathodes were prepared by hot-pressing by a completely dry, solvent-free procedure. The thermal stability of both the PEO membranes and the composite cathodes was investigated. The cells were assembled by the direct lamination of the components, namely a lithium foil anode, the PEO-based electrolyte membrane and the composite LiFePO4 cathode tape. The Li/LiFePO4 polymer cells perform well in terms of specific capacity, charge/discharge efficiency and cycle life. At temperatures above 90 degreesC, the cells are capable of delivering capacities exceeding 100 mAh/g, even at moderately high rates. More than 400 cycles were obtained with a charge/discharge efficiency approaching 100%. (C) 2003 Elsevier B.V. All rights reserved.
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