摘要
通过XRD ,DSC ,FT IR和SEM等方法对PEO LiClO4 ZSM5复合电解质进行了研究 ,结果表明ZSM 5可以有效地降低PEO LiClO4 ZSM5复合电解质中PEO的结晶度和玻璃化温度 ,从而提高其低温区域的离子电导率 .温度高于PEO的结晶熔融温度后 ,复合电解质离子电导率的提高则是由于在ZSM 5表面形成了有利于Li离子迁移的导电通道所引起的 .较高的离子电导率和较宽的电化学稳定窗口表明PEO LiClO4 ZSM5复合电解质在全固态锂离子二次电池领域具有良好的应用前景 .
Interactions between PEO chains and ZSM-5 fillers in PEO-LiClO 4-ZSM5 composite electrolytes were studied by XRD, DSC, FT-IR, and SEM techniques. The experimental result shows that ZSM-5 can inhibit the recrystallinity of PEO and reduce its glass transition point at the same time, then enhancing the ionic conductivity of the composite electrolyte. When temperature is higher than the melting point of PEO, the enhancement of ionic conductivity can be attributed to the formation of special conducting pathway on the surface of ZSM-5 that is favorable to the transference of Li cations. Excellent electrochemical performances such as high ionic conductivity, and broad electrochemical stability window suggest that PEO-LiClO 4-ZSM5 composite electrolyte can be used as electrolyte materials for all solid-state rechargeable lithium polymer batteries.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2004年第18期1755-1759,共5页
Acta Chimica Sinica
基金
上海市重点科技攻关 (No.0 2dz1 1 0 0 2 )资助项目
