摘要
采用溶剂法制备了聚丙烯酸(PAA)-KOH碱性聚合物电解质薄膜.循环伏安(CV)和激光拉曼光谱(Raman)结果表明,该电解质膜具有较好的电化学稳定性.交流阻抗(EIS)结果表明,随着KOH含量的增加,该薄膜的离子电导率先增大后减小.当PAA∶KOH的质量比为10∶21时,薄膜电导率最大,为2.7×10-2S/cm.将该薄膜应用于以AB3合金为负极活性物质的镍氢二次电池中.结果表明,与以KOH水溶液为电解质的电池相比,聚合物电池具有更优的循环寿命,但倍率性能仍需改善.
PAA alkaline polymer electrolyte membranes were successfully prepared by a solution-casting technique. The results of cyclic voltammograms （CV） and Raman spectra indicated that the polymer electrolytes had promising electrochemical stabilities. The electrochemical impedance spectra （EIS） results showed that the ionic conductivity of the PAA alkaline membranes first increased with the increase of KOH, then decreased with the further increase of KOH. When the weight ratio of PAA to KOH was equal to 10 ： 21, it exhibited the highest ionic conductivity of 2. 7×10^-2 S/cm at room temperature. Then, this polymer electrolyte membrane was employed in Ni/MH battery with an AB3 alloy as the negative active material. Compared with the Ni/MH battery with a KOH solution as the electrolyte, the Ni/MH polymer battery showed a longer cycle life, while its high rate capability was still far from satisfaction.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第5期57-61,共5页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
国家863计划(2007AA05Z149)
天津市应用基础研究计划(07JCZDJC02700)
关键词
聚丙烯酸
碱性聚合物电解质
电化学稳定性
镍氢二次电池
poly（acrylic acid） alkaline polymer electrolyte
electrochemical stability
Ni/MH secondary battery
