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中文摘要：
凝胶聚合物锂离子电池的关键技术之一是制备聚合物电解质，要求聚合物电解质具有高的离子传导率、适宜的机械强度、柔韧性、孔结构和电化学稳定性等,利用三乙酸甘油酯（GT）作为稀释剂，通过热致相分离（TIPS）法制备了PVDF多孔骨架，然后将多孔膜浸入LiPF6EC／DMC／EMC电解液中通过凝胶相转变制得PVDF凝胶电解质．分析研究了冷却条件与聚合物浓度对多孔膜结构以及性能的影响，发现在15℃冷却浴下PVDF浓度为30％的多孔膜具有较好的吸液率和力学性能，由此制得的凝胶聚合物电解质的电导率为1．21mS／cm。
英文摘要：
The key technique of gel polymer lithium batteries is the preparation of polymer electrolyte that is required to have high conductivity, suitable mechanical strength, flexility, pore structure, chemical and electrochemical stability, etc. Porous PVDF membranes with different PVDF concentrations are obtained by thermally induced phase separation method at different cooling temperatures. By immersing PVDF porous membrane in liquid electrolyte LiPF6 EC/DMC/EMC to absorb the liquid electrolyte, the PVDF gel polymer electrolyte membranes （Li-GPEMs） are fabricated successfully. The structure and performance of membranes were investigated and related to initial PVDF concentration and cooling condition. It was found that the membrane prepared with PVDF concentration of 30wt% and at 15℃ possessed higher liquid electrolyte uptake and mechanical property, and the polymer electrolyte prepared from that had an ambient temperature conductivity of 1.21mS/cm.
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