具有高温稳定性的固态TiO_2/P(VDF-HFP)纳米复合聚合物电解质的研究

Study of Solid State TiO_2/P(VDF-HFP) Nanocomposite Polymer Electrolyte with High Temperature Stability

以室温离子液体N-甲基-N′-乙基咪唑四氟硼酸盐(EMIBF4)为溶剂,钛酸丁酯原位水解合成TiO2纳米粒子复合聚合物基体,制备固态纳米复合聚合物电解质.热失重测试结果表明该纳米复合聚合物电解质的初始分解温度超过了300℃,具有较好的高温稳定性能.当纳米复合聚合物电解质中含有3%质量分数的TiO2纳米粒子时,聚合物电解质的室温离子电导率达到4.1×10-3S/cm,有望在超级电容器或动力锂离子电池中得以应用.

A solid state nanocomposite polymer electrolyte （NCPE） based on poly（vinylidene fluoridehexafluoro propytene） （ P （VDF-HFP） ） copolymer was prepared by filling the TiO2 nanoparticles, which come from in situ hydrolysis of titanium tetrabutoxide in a room temperature ionic liquid, N-ethyl-N＇-methylimidiazolium tetrafluoroborate （EMIBF4） ,into polymer matrix. The results of TG measurement reveals that the resultant NCPE had well thermal stability with an initial decomposed temperature over 300 ℃. When the NCPE contains 3% of TiO2 nanoparticles,its ionic conductivity adds up to 4.1 × 10 3 S · cm^-1 at room temperature, showing a possible application in dynamic lithium-ion batteries or electrochemical super-capacitors.