Lithium chemical diffusion coefficients in poly(ethylene oxide)-molybdenum sulfide nanocomposites

被引：17
|
作者：
Gonzalez, G
SantaAna, MA
Benavente, E
机构：
[1] Departamento de Quimica, Facultad de Ciencias, Universidad de Chile, Santiago
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1997年 / 58卷 / 09期
关键词：
chalcogenides; multilayers; polymers; diffusion; electrochemical properties;
D O I：
10.1016/S0022-3697(97)00009-7
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The intercalation of poly(ethylene oxide) (PEO) in molybdenum sulfide (MoS2) forms the nanocomposites LixMoS2(PEO)(0.5) and LixMoS2(PEO)(1.0). The lithium ion diffusivity in PEO-containing phases, which depends on both PEO and lithium content, is always higher than in pure MoS2. The maximal observed diffusivity values, but also the strongest dependence on lithium concentration, are observed for LixMoS2(PEO)(0.5), possibly due to their relatively greater freedom for rearrangement. Lithium diffusion activation thermodynamic parameters indicate a mechanism which appears to be mainly governed by PEO conformational changes caused by the trend of the polymer to coordinate lithium ions. (C) 1997 Elsevier Science Ltd. All rights reserved.
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收藏
页码：1457 / 1460
页数：4
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