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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Charge-Transfer Reaction Rate of Li~+/Li Couple in Poly(ethylene glycol) Dimethyl Ether Based Electrolytes
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Charge-Transfer Reaction Rate of Li~+/Li Couple in Poly(ethylene glycol) Dimethyl Ether Based Electrolytes

机译：Li〜+ / Li对在聚乙二醇二甲醚基电解质中的电荷转移反应速率

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摘要

The exchange current densities of the Li~+/Li couple reaction in polyether based electrolytes, 0.5 M LiCF_3SO_3/poly(ethylene glycol) dimethyl ether whose molecular weight is 500 (PEGDME500), were investigated for the studies about charge-transfer reaction rate at the electrode/electrolyte interfaces. It was found that the exchange current densities in the PEGDME500 based electrolytes decreased with increasing amounts of PEGDME1000 (molecular weight: 1000). Raman spectroscopic studies indicated that the activity of lithium ions, which is a factor for the exchange current densities, was found to be the almost constant even with the addition of PEGDME1000 in to the electrolytes. The Gibbs activation energies for the interfacial reaction were also the almost constant. Meanwhile, inversely proportional relationships between the exchange current densities and viscosities of the electrolytes were observed. Our studies elucidated that viscosity of the electrolytes was the only important factor for the charge-transfer reaction rate at polyether based electrolyte/electrode interfaces.
机译：研究了在聚醚基电解质，分子量为500的0.5 M LiCF_3SO_3 /聚乙二醇二甲醚（PEGDME500）中Li〜+ / Li偶合反应的交换电流密度，以研究电极/电解质界面。发现基于PEGDME500的电解质中的交换电流密度随着PEGDME1000（分子量：1000）的增加而降低。拉曼光谱研究表明，即使将PEGDME1000添加到电解质中，作为交换电流密度的一个因素，锂离子的活性也几乎是恒定的。界面反应的吉布斯活化能也几乎是恒定的。同时，观察到交换电流密度与电解质粘度之间的反比关系。我们的研究表明，电解质的粘度是在聚醚基电解质/电极界面处电荷转移反应速率的唯一重要因素。

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