摘要
研究了乙烯碳酸酯（ＥＣ）增塑的（ＰＥＯ）１６ＬｉＣＬＯ４－ＥＣ复合聚合物电解质交流阻抗谱图，提出了不锈钢电极／聚合物电解质／不锈钢电极这种结构在交流阻抗测试分析中具有普适性的摸拟等效电路，并且根据等效电路中元件拟合值测定出复合聚合物电解质体系在不同ＥＣ增塑量及温度时的电导率。用复合聚合物电解质体系中各组分之问的相互作用解释了 ＥＣ对聚合物电解质导电行为的影响。在低 ＥＣ含量的复合聚合物电解质体系中，电导率和温度的关系在低温时符合Ａｒｒｈｅｎｉｕｓ方程，在高温时符合Ｖｏｇｅｌ－Ｔａｍｍａｎ－Ｆｕｌｃｈｅｒ－Ｆｕｌｃｈｅｒ（ＶＴＦ）方程；而当ＥＣ含量大于２０％时，电导率和温度的关系在实验温度范围内都符合ＶＴＦ方程。
The ac impedance plots of ( PEO)(16) LiClO4-EC composite polymer electrolytes were studied. The equivalent circuit of stainless steel electrode(SS)/composite electrolyte/SS system was applied to explain the ac impedance plots, The results showed that the equivalent circuit could fit the experimental data very well. The ionic conductivity was calculated using the bulk resistance that was obtained from equivalent circuit. The effect of EC on the conductive behavior was explained by the interactions among different species formed in the composite polymer electrolytes. For lower EC concentration samples, the temperature dependence of conductivity in low temperature range followed Arrhenius type, but when EC concentration was larger than 20%, the temperature dependence of conductivity obeyed the Vogel-Tamman-Fulcher (VTF) equation in all temperature ranges.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期1-5,共5页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(No.20075028)
中国博士后科学基金及中国科学院王宽诚博士后工作奖励基金资助项目
