Author:
Zang Ru-Yi,Qiu Guang-Ming,Zhang Yan-Li,Wang Hai-Bo
Abstract
Abstract
The copolymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and trifluoroethyl methacrylate (TFEMA) was performed to synthesize the random copolymer P (AMPS-TFEMA). This polymer was blended with polyvinylidene fluoride (PVDF) to prepare the new blend membranes containing sulfonate. The blend membranes were activated with 1 M LiPF6 solution to prepare gel polymer electrolytes. The thermal properties, morphology, mechanical properties, uptake electrolyte, and electrochemical properties of blend membranes were characterized. The effect of polymer on the membrane structure and performance was studied. At room temperature, the gel polymer electrolyte conductivity of P(AMPS-TFEMA) 30 wt% was up to 2.6 mS cm-1(uptake electrolyte 550%, swelling ratio less than 10%), and the electrochemical window was up to 4 V, which were acceptable for lithium ion batteries( LIBs).