Electrochemical Performance of Lithium Polymer Battery Based on PC/Polymer Borate Ester Plasticizers

The electrochemical performance of a lithium polymer battery based on a novel gel polymer electrolyte and a substituted spinel cathode was investigated. Propylene carbonate (PC) and poly(ethylene glycol)-borate ester (PEG-BE) were used as plasticizers in the polymer electrolyte composed of poly (ethylene glycol) methacrylates (PEG-Ms) and LiClO 4 . The electrolyte exhibited satisfactory thermal, mechanical, and electrochemical stability. The Li/PC/PEG-BE based polymer electrolyte/LiMn 1 . 8 co 0 . 2 O 4 cell generated a reasonable steady capacity at room temperature and a substantial rate capability at 65°C.

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