Lithium-7 NMR and ionic conductivity studies of gel electrolytes based on poly(methylmethacrylate)
Lithium-7 NMR and ionic conductivity studies of gel electrolytes based on poly(methylmethacrylate)
复制标题
基于聚甲基丙烯酸甲酯的凝胶电解质的锂 7 NMR 和离子电导率研究
DOI：
10.1016/0013-4686(95)00153-6
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Salomon
中科院分区：
文献类型：
--
作者：
P. Stallworth;S. Greenbaum;F. Croce;S. Slane;M. Salomon
用差示扫描量热法、电导率法和7li、19F和75as核磁共振波谱法研究了由聚甲基丙烯酸甲酯、碳酸乙烯酯、碳酸丙酯和各种锂盐[LiClO4、LiAsF6或LiN(CF3SO2)2]合成的凝胶电解质。虽然凝胶的离子电导率接近于室温以上液体电解质的电导率，但核磁共振结果表明，凝胶和液体中阳离子和阴离子的直接环境有显著差异。因此，可以排除凝胶中存在纯液体电解质的微观区域。
Gel electrolytes synthesized from poly(methylmethacrylate), ethylene carbonate, propylene carbonate and various lithium salts [LiClO4, LiAsF6, or LiN(CF3SO2)2] have been investigated by differential scanning calorimetry, electrical conductivity, and7Li,19F and75As NMR spectroscopy. Although the ionic conductivities of the gels approach those of liquid electrolytes above room temperature, the NMR results indicate that the immediate environments of both the cations and anions differ significantly in the gel and in the liquid. Thus the presence of microscopic regions of pure liquid electrolyte in the gel can be ruled out.