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Effect of Organic Solvents on the Electrochemical Performance of Sodium‐Ion Hybrid Capacitors
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-12-19 , DOI: 10.1002/celc.201801517 Myung‐Soo Park 1 , Ganesh Kumar Veerasubramani 1 , Ranjith Thangavel 2 , Yun‐Sung Lee 2 , Dong‐Won Kim 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-12-19 , DOI: 10.1002/celc.201801517 Myung‐Soo Park 1 , Ganesh Kumar Veerasubramani 1 , Ranjith Thangavel 2 , Yun‐Sung Lee 2 , Dong‐Won Kim 1
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A comparative study on the ionic conductivity of carbonate‐ and ether‐based electrolytes was performed, which showed that the ionic conductivity was strongly affected by the dielectric constant of the organic solvent. The relationship between the physicochemical properties of a liquid electrolyte and the cycling performance of sodium‐ion hybrid capacitors (SICs) was assessed by comparing the electrochemical characteristics of SICs assembled with a negative activated carbon electrode and a positive Na3V2(PO4)3 electrode. Cyclic voltammetry, leakage current measurements, and electrochemical impedance spectroscopy results demonstrated that the good cycling performance of SICs with carbonate‐based electrolytes can be ascribed to their superior electrochemical stability, large amounts of free ions, and favorable electrochemical reaction kinetics. An SIC employing an electrolyte consisting of 1.0 M NaClO4 in ethylene carbonate/propylene carbonate exhibited a good rate capability and delivered a high initial discharge capacity of 98.7 mAh g−1 with a capacity retention of 90.8 % after 1000 cycles at a constant current density of 500 mA g−1.
中文翻译：
有机溶剂对钠离子混合电容器电化学性能的影响
对碳酸盐和醚基电解质的离子电导率进行了比较研究，结果表明，离子电导率受有机溶剂的介电常数的强烈影响。通过比较组装有负极活性炭电极和正极Na 3 V 2（PO 4）的SIC的电化学特性，评估了液体电解质的物理化学性质与钠离子混合电容器（SIC）的循环性能之间的关系。3电极。循环伏安法，泄漏电流测量和电化学阻抗谱结果表明，具有碳酸酯类电解质的SIC具有良好的循环性能，可归因于其优异的电化学稳定性，大量的游离离子和良好的电化学反应动力学。使用由碳酸亚乙酯/碳酸亚丙酯中的1.0 M NaClO 4组成的电解质的SIC具有良好的倍率能力，在恒定电流密度下经过1000次循环后，初始放电容量为98.7 mAh g -1，容量保持率为90.8％。 500 mA g -1。
更新日期：2018-12-19
中文翻译：
有机溶剂对钠离子混合电容器电化学性能的影响
对碳酸盐和醚基电解质的离子电导率进行了比较研究，结果表明，离子电导率受有机溶剂的介电常数的强烈影响。通过比较组装有负极活性炭电极和正极Na 3 V 2（PO 4）的SIC的电化学特性，评估了液体电解质的物理化学性质与钠离子混合电容器（SIC）的循环性能之间的关系。3电极。循环伏安法，泄漏电流测量和电化学阻抗谱结果表明，具有碳酸酯类电解质的SIC具有良好的循环性能，可归因于其优异的电化学稳定性，大量的游离离子和良好的电化学反应动力学。使用由碳酸亚乙酯/碳酸亚丙酯中的1.0 M NaClO 4组成的电解质的SIC具有良好的倍率能力，在恒定电流密度下经过1000次循环后，初始放电容量为98.7 mAh g -1，容量保持率为90.8％。 500 mA g -1。
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