一种新型碱性多孔聚合物电解质的制备与性能研究  

Research in Preparation and Performance of a Novel Alkaline Microporous Polymer Electrolyte

作　　者：陈忠元[1] 居亚兰[1] 张文锋[1] 朱云峰[1] 李李泉[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《材料导报（纳米与新材料专辑）》2009年第2期316-318,334,共4页

摘　　要：用萃取活化法制备了PVA基碱性多孔聚合物电解质,其制备过程包括3步:(1)PVA/PEG共混膜的制备;(2)通过萃取制备PVA基多孔膜;(3)用KOH溶液浸泡多孔膜。并采用交流阻抗、扫描电镜和X射线衍射法对该膜进行了分析,结果表明,制得的多孔膜具有不对称的孔状结构,当m(PVA):m(PEG)=7:3时,样品经过萃取活化后吸液率与离子电导率最大,分别为94.4%和9.71×10^(-3)S/cm;循环伏安测试表明,体系的电化学稳定窗口达到2.2V,经过50个循环后电化学稳定窗口仍保持在2.2V。这种新型碱性多孔聚合物电解质有望应用在镍氢电池中。The preparation of PVA-based alkaline microporous polymer electrolyte（AMPE） by an extractionactivate method is described. The preparation of AMPE includes three steps： （1） preparing the PVA/PEG membranes, （2） forming PVA-based microporous membranes by extraction of PEG,and （3） activating the samples with a 6mol/L KOH aqueous electrolyte. The membranes are analyzed and characterized by means of AC impedance spectroscope, X- ray diffraction and scanning electron microscopy. The experimental results show that the membranes have an asymmetric pores structure and the optimal AMPE has a composition of m（PVA） ： m（PEG）= 7 ： 3, which has electrolyte uptake of 94. 4%,a high ionic conductivity of 9. 71 ×10^-3 S/em at room temperature. The cyclic voltammetry test indicates that the system exhibits a high electrochemical stability potential of 2. 2V even after the 50th sweeping cycle. The results are really encouraging in a way that the AMPE appears to be one of the most significant players for application in nickel metal hydride batteries.

关 键 词：碱性聚合物电解质 多孔 离子电导率 电化学稳定窗口 

分 类 号：TQ028.8[化学工程] TM912[电气工程—电力电子与电力传动]