PEO-LiClO_4-ZSM5 composite polymer electrolyte(IV):Polarized optical microscopy study  

作　　者：XI Jingyu QIU Xinping ZHU Wentao CHEN Liquan 

机构地区：[1]Department of Chemistry, Tsinghua University, Beijing 100084, China Department of Chemistry, Tsinghua University, Beijing 100084, China Department of Chemistry, Tsinghua University, Beijing 100084, China Department of Chemistry, Tsinghua University, Beijing 100084, China

出　　处：《Science China Chemistry》2005年第6期574-579,共6页中国科学（化学英文版）

基　　金：supported by the State Key Basic Research Program of China(2002CB211803).

摘　　要：Polarized optical microscopy (POM) results show that ZSM5 has great influence on both the nucleation stage and the growth stage of PEO spherulites. Part of ZSM5 particles can act as the nucleus of PEO spherulites and thus increase the amount of PEO spherulites. On the other hand, ZSM5 can restrain the recrystallization tendency of PEO chains through Lewis acid-base interaction and hence decrease the growth speed of PEO spherulites. The increasing amount of PEO spherulites, decreasing size of PEO spherulites, and the incomplete crystalliza-tion are all beneficial for creating more continuous amorphous phases of PEO, which is very important for the transporting of Li+ ions. An adequate amount of ZSM5 can enhance the room temperature ionic conductivity of PEO-LiClO4 based polymer electrolyte for more than two mag-nitudes.Polarized optical microscopy (POM) results show that ZSM5 has great influence on both the nucleation stage and the growth stage of PEO spherulites. Part of ZSM5 particles can act as the nucleus of PEO spherulites and thus increase the amount of PEO spherulites. On the other hand, ZSM5 can restrain the recrystallization tendency of PEO chains through Lewis acid-base interaction and hence decrease the growth speed of PEO spherulites. The increasing amount of PEO spherulites, decreasing size of PEO spherulites, and the incomplete crystalliza-tion are all beneficial for creating more continuous amorphous phases of PEO, which is very important for the transporting of Li+ ions. An adequate amount of ZSM5 can enhance the room temperature ionic conductivity of PEO-LiClO4 based polymer electrolyte for more than two mag-nitudes.

关 键 词：composite polymer electrolyte  poly (ethylene oxide)  ZSM-5  POLARIZED optical microscopy  spherulites. 

分 类 号：N[自然科学总论]