一种新型锂离子电池用聚合物电解质复合膜的制备和性能表征

Preparation and Characterization of a Novel Kind of Polymer Electrolyte Composite Membrane for Lithium-Ion Battery

阐述了一种新型锂离子电池用PVDF-HFP(聚偏氟乙烯-六氟丙烯聚合物树脂)基聚合物电解质复合膜的制备过程.对复合膜中使用的无机TiO2纳米颗粒进行固体超强酸化处理,并进行颗粒表面酸强度H0测试、XRD晶体结构分析以及复合膜的电解液吸附率测试和电化学阻抗谱测试.采用PE无纺布支撑体作为增强材料,以浸涂方法制备复合膜,并进一步组装为锂离子电池,性能测试表明该电池具有良好的电化学性能.

A novel kind of PVDF-HFP（polyvinylidene fluoride-hexafluoropro-pylene）-based polymer electrolyte composite membrane for lithium-ion battery was prepared. Inorganic TiO2 nanopowders in composite were dealt with solid super-acidization. Series of characterizations were carried on, such as surface acid strength H0, XRD analysis, electrolyte absorbency, and electrochemical impedance spectroscopy. PE non-woven fabrics were introduced as the reinforced materials, which were soaked to prepare the composite membranes, and then assembled to get the resulted lithium-ion battery. Performance tests indicated that the lithium-ion battery had good electrochemical performance.