STUDIES OF THE INTERFACE BETWEEN V6O13 AND POLY(ETHYLENE OXIDE) BASED ELECTROLYTES
STUDIES OF THE INTERFACE BETWEEN V6O13 AND POLY(ETHYLENE OXIDE) BASED ELECTROLYTES
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DOI：
10.1016/0013-4686(88)80240-8
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发表时间：
1988-11-01
影响因子：
6.6
通讯作者：
KROK, F
中科院分区：
文献类型：
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作者：
BRUCE, PG;KROK, F
在V6O13/聚环氧乙烷-LiX界面上进行了阻抗测量，其中X=CF3SO3或ClO4。结果表明，存在两个半圆，其中一个与电容有关，其范围从8×10−8到3×10−7F cm−2。该电容的大小随时间减小，而与之相关的电阻增加，但时间常数τ(τ=Rc几乎不变。这种电阻的温度依赖关系和体液的温度依赖关系表现出类似的不连续性。得到了高相对分子质量(固体)电解质和低相对分子质量(液体)电解质的相似阻抗曲线。电化学测试表明，V6O13电极表面存在一层锂离子导电层。阻抗图中出现的第二个半圆被认为是由电极上的电荷转移引起的。总界面电阻一般是体相电解液的数倍。
acimpedance measurements have been carried out on the V6O13/poly(ethylene oxide)—LiX interface, where X = CF3SO3or ClO4. The reveal the existence of two semicircles one of which is associated with capacitances which range from, 8 × 10−8to 3 × 10−7F cm−2. The magnitude of this capacitance decreases with time whereas the associated resistance increases, however the time constant τ (τ =RC) is virtually invariant. The temperature dependence of this resistance and that of the bulk electrolyte exhibit a similar discontinuity. Similaracimpedance plots are obtained for both high molecular weight (solid) electrolytes and low molecular weight (liquid) electrolytes. The electrochemical measurements suggest that a lithium ion conducting layer is present on the surface of the V6O13electrode. The second semicircle present in the impedance plots is assumed to arise from charge transfer at the electrode. The total interfacial resistance is generally many times that of the bulk electrolyte.