Synthesis and Characterization of Imidazolium-Based Network Ionic Polymer Composites
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초록
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Next-generation secondary batteries require electrolytes with high stability and ionic conductivity. Developing novel polymer composite electrolytes that combine the mechanical strength of polymers with high ionic conductivity materials is crucial to meet these requirements. In this study, network ionic polymers were synthesized via UV crosslinking of imidazolium-based ionic monomers and trimethylolpropane ethoxylate triacrylate(ETPTA) at various mass ratios, followed by property characterization. The polymer with an ionic monomer to ETPTA mass ratio of 20:1 exhibited the highest flexibility and the lowest glass transition temperature (Tg) of -12 ℃. Consequently, this polymer was mixed with 1,2-bis(N-decyl-N,N-dimethylammonium)ethane 2Tf2N- at different mass ratios to create polymer composite electrolytes, and their thermal properties were studied. Composites containing more than 30 wt% organic ionic plastic crystal (OIPC) showed a Tg increase of approximately 20 ℃.