期刊
SOLID STATE IONICS
卷 166, 期 3-4, 页码 407-415出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2003.11.009
关键词
lithium; polymer electrolyte; PEO; LIBETI; NMR; diffusion coefficients
An extensive NMR investigation of filler-free and SiO2 nanoparticle-containing P(EO)(20)LiBETI polymer electrolytes prepared through a solvent-free procedure is reported. Li-7 and F-19 NMR spectra, spin-lattice relaxation times and self-diffusion coefficients were measured in the temperature range extending from 25 to 100degreesC. There was essentially no difference in the D-Li for filler-free and nanosized SiO2-containing P(EO)(20)LiBETI at T greater than or equal to 80degreesC. The D-F showed differences at T less than or equal to 90degreesC, with the SiO2-containing P(EO)(20)LiBETI having the greater D-f. Discrepancies between calculated and measured ionic conductivity are attributed to variable length scale diffusion within heterogeneous media, rather than ion pairing effects, (C) 2003 Elsevier B.V All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据