Lithium polymer batteries assembled with in situ cross-linked gel polymer electrolytes containing ionic liquid

Chemically cross-linked gel polymer electrolytes containing ionic liquid were prepared and their electrochemical properties were investigated. Lithium polymer batteries composed of a lithium anode and a LiNi1/3Co1/3 Mn1/3O2 cathode were assembled using an in situ cross-linked gel polymer electrolyte and their cycling performances were evaluated. The optimum content of the cross-linking agent to ensure both high initial discharge capacity and good capacity retention of the lithium polymer battery was found to be about 4 wt%. [graphic not available: see fulltext]