PVA-PC-KOH-H20碱性固体聚合物电解质的制备和表征

以PVA—KOH—H20体系碱性固体聚合物电解质为基质，添加适量碳酸丙烯酯（PC）做增塑剂来提高性能。利用X一射线衍射分析、红外光谱技术分析、交流阻抗谱和循环伏安法等对样品进行了表征。研究结果表明，聚合物电解质以无定形态为主，含极少量晶相，PC的适量添加可以降低电解质膜的结晶度增大无定形区域，从而提高室温离子电导率，当PVA：PC=3：I（质量比）复合电解质膜的室温电导率最高可达4．41x10-2S／cm，同时电化学稳定窗口也满足使用要求（相对于不锈钢电极，其电压稳定窗口为3．5v）。

Preparation and Characterization of An Alkaline Solid PVA-PC-KOH-H20 Electrolyte

A composite alkaline solid polymer electrolyte（ASPE） based on PVA-KOH-H20 were prepared using polyearbonate （PC） as plasficizem. The properties of PVA based composite alkaline polymer electrolytes were studied by X-ray diffraction （XRD）, Infrared spectroscopy analysis （IR）,cyelie voltammetry and AC impedanee methods. The experimental results indicated that ASPE films showed anamorphous phase with farthing crystal phase, the addition of PC redueed the crystallinity of ASPE to make amorphous region augmented. The ionic eonductivity of the electrolyte was improved with the content of PC inereased appropriately, the electrolyte＇s ionic conductivity is up to a maximum（4.41xl0-2 S/em）when the weight ratio PVA/PC is equal to 3, and the electrochemical potential stability window was 3.5V for SS/ASPE/SS （ SS for stainless steel） that can meet the ecmioment＇ demands for their electrolytes.