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Pure Appl. Chem., 2008, Vol. 80, No. 11, pp. 2553-2563

Research on a gel polymer electrolyte for Li-ion batteries

Guangchao Li, Zhaohui Li, Peng Zhang, Hanping Zhang and Yuping Wu

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China

Abstract: The preparation, physical, and electrochemical properties of Li-ion conducting membranes, poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)]-based gel polymer electrolytes, are briefly reviewed in this paper. Phase separation or inversion method is mostly used to prepare microporous membranes because of the flexibility of its operation and controllable pore structure. The crystallinity of the polymer matrix and the pore structure of the membrane are the key issues to prepare P(VDF-HFP)-based gel polymer electrolytes with high Li+ conductivity and good mechanical strength. As to their further directions, they are also discussed.