PVA-CMC-KOH-H_2O碱性聚合物电解质研究  

Studies on PVA-CMC-KOH-H_2O Alkaline Polymer Electrolytes

作　　者：袁安保[1] 赵俊[1] 

机构地区：[1]上海大学理学院化学系,上海200444

出　　处：《电化学》2006年第1期40-45,共6页Journal of Electrochemistry

基　　金：上海市教委发展基金(02AK50)资助

摘　　要：由聚乙烯醇(PVA)与羧甲基纤维素钠(CMC)制备PVA-CMC-KOH-H2O碱性聚合物电解质膜,应用交流阻抗、循环伏安、差热分析和红外光谱等实验方法表征、研究其性能.结果表明,该碱性聚合物电解质的室温电导率可达到10-2S.cm-1数量级,在不锈钢惰性电极上的电化学稳定窗口约为1.6 V.另外,还研究了聚合物电解质膜中KOH、H2O和CMC对体系电导率的影响以及PVA-CMC-KOH-H2O碱性聚合物电解质在N i/MH电池中的初步应用.初步结果表明,由PVA-CMC-KOH-H2O聚合物电解质组装的N i/MH电池,其低倍率放电性能较好.A given amount of sodium carboxymethyl cellulose（CMC） was added to PVA complex and thus the PVA-CMC-KOH-H20 alkaline polymer electrolyte with this modification was prepared. The properties of the polymer electrolyte films were characterized by AC impedance, cyclic voltammetry, differential thermal analysis and infrared spectroscopic analysis methods. The polymer electrolyte exhibited a high ionic conductivity, typically 10-2S · cm^-1 with an electrochemical stability window of about 1.6 V on stainless steel blocking electrodes. The influence of the film composition such as KOH, H2O and CMC on ion conductivity was investigated. In addition, a preliminary study was carried out on the polymer electrolyte for Ni/MH battery, it was shown that the Ni/MH battery with the polymer electrolyte presented a good charge/discharge performance at lower discharge rates.

关 键 词：碱性聚合物电解质 PVA CMC 共混改性 离子电导率 

分 类 号：O631.3[理学—高分子化学]