【作者】 周锦涛； 焦晓宁； 于宾； 任元林； 康卫民；

【Author】 Zhou Jintao;Jiao Xiaoning;Yu Bin;Ren Yuanlin;Kang Weimin;School of Textile, Tianjin Polytechnic University;Key Laboratory of Advanced Textile Composite, Ministry of Education of China;

【机构】 天津工业大学纺织学院； 纺织复合材料教育部重点实验室；

【摘要】 采用静电喷雾沉积技术在两层聚偏氟乙烯-六氟丙烯（PVd F-HFP）静电纺丝纳米纤维之间沉积一层氧化铝（Al₂O₃）微粒,制备出新型具有三明治结构的复合膜（SCM）。考察分析了SCM的表面形貌、耐热收缩性能、电化学性能以及所制备电池的循环充放电性能等。结果表明SCM具有比P（Vd F-HFP）静电纺丝纤维膜（PHM）更高的吸液率,在吸收电解液后更易形成凝胶聚合物电解质（GPEs）;在室温下测试得到SCM GPE的离子电导率为1.61 m Scm^-1,电化学稳定窗口5.4 V;以Li Co O₂作为正极材料,所制备电池的首次放电比容量高达145 m Ahg^-1。更多还原

【Abstract】 A novel sandwiched composite membrane（SCM） was prepared by depositing alumina micro-particles between two layers of electrospun poly（vinylidene fluoride-co-hexafluor-opropylene）（P（Vd F-HFP）） nanofibers through electrostatic spray deposition. The morphologies, thermal shrinkage, electrochemical properties of the separator and battery performance for cells with the SCM were investigated. The results show that SCM has a higher uptake than the pure P（Vd F-HFP） membrane（PHM） electrolyte and easily absorbs electrolyte to form gel polymer electrolytes（GPEs）. The ionic conductivity of SCM GPEs is 1.61×10^-3 Scm^-1 at room temperature, and the GPE shows a high electrochemical stability potential of 5.4 V. With Li Co CO₂ as cathode, the cell with SCM GPEs exhibits high initial discharge capacity of 145 m Ahg^-1.更多还原