Effect of temperature on characteristics of V(III)/V(II) redox couple in non-aqueous deep eutectic solvent

被引：0

作者：

Xu Q. ^{[1
]}

Qin L. ^{[2
]}

Su H. ^{[1
]}

Xu L. ^{[1
]}

Li H. ^{[1
]}

机构：

[1] Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, Jiangsu

[2] School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu

来源：

Xu, Qian (xuqian@ujs.edu.cn) | 2016年 / Materials China卷 / 67期

基金：

中国国家自然科学基金;

关键词：

Deep eutectic solvent; Electrochemistry; Electrolytes; Temperature effect; Vanadium ion;

D O I：

10.11949/j.issn.0438-1157.20161025

中图分类号：

学科分类号：

摘要：

Compared with conventional aqueous electrolyte, deep eutectic solvent (DES) has been studied as the electrolyte of flow battery for its unique advantages. However, its physical and electrochemical properties are more sensitive to the temperature and related researches can hardly be found in open literature. The aim of the work is to study the physical and electrochemical properties of vanadium ions in DES through varying the operating temperatures. The curves of cyclic voltammetry indicate that vanadium ions show a quasi-reversible reaction. As the temperature increased from ambient temperature to 55℃, the difference between oxidation and reduction peaks decreases from 0.271V to 0.249 V at the scan rate of 100 mV·s-1. At the same time, both the anodic and the cathodic peak current densities of the V(II)/V(III) have the similarly incremental trend. The conductivity also has an obvious increment from 2.2 mS·cm-1 at ambient temperature to 11.16 mS·cm-1 at 55℃, but the viscosity of DES vanadium ions have a huge drop. The results prove that the operating temperature plays a vital effect on the characteristics of DES and it deserves a further study. © All Right Reserved.

引用

页码：5298 / 5304

页数：6

共 22 条

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