物理学报2011，Vol.60Issue(12)：575-582,8.
聚合物纳米复合电解质（PEO）_8-ZnO-LiClO_4微结构及电导率研究
Investigations of microstructure and ionic conductivity for （PEO）_8-ZnO-LiClO_4 polymer nanocomposite electrolytes
摘要
Abstract
The effects of nanosized ZnO on the microstructure,the free volume and the ionic conductivity of poly ethylene oxide （PEO） nanocomposite electrolytes （PEO）8-ZnO-LiClO4 are systematically studied by scanning electron microscopy,X-ray diffraction,Fourier transform infrared spectroscopy and positron annihilation lifetime spectroscopy （PALS）,respectively.The experimental results show that the presence of the nanosized ZnO brings about a reduction in the crystallinity of the PEO phase and a very marked increase in ionic conductivity.PALS discrete analysis shows that the free volume size,the free volume concentration and the relative free volume fraction significantly increase with the increase of nano-ZnO.Specially,it is the first time to observe the occurrence of peaks of the free volume distribution split after nano-ZnO has been filled,which indicates that the ZnO added into （PEO）8-LiClO4 has an important effect on the microstructure for nanocomposites due to the interaction between the nano-ZnO and matrix.A direct correlation between the free volume fraction and the ionic conductivity is observed,and the ionic conductivity mechanism is discussed.关键词
正电子湮没寿命谱/聚合物纳米复合电解质/离子电导率/自由体积Key words
positron annihilation lifetime spectroscopy/nanocomposite polymer electrolytes/ionic conductivity/free volume分类
化学化工引用本文复制引用
王君君,龚静,宫振丽,闫晓丽,高舒,王波..聚合物纳米复合电解质（PEO）_8-ZnO-LiClO_4微结构及电导率研究[J].物理学报,2011,60(12):575-582,8.基金项目
国家自然科学基金（批准号：10875089）资助的课题 （）
