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Electrochemical Behaviour of Lithium, Sodium and Potassium Ion Electrolytes in a Na0.33V2O5 Symmetric Pseudocapacitor with High Performance and High Cyclic Stability
ChemElectroChem ( IF 3.5 ) Pub Date : 2017-11-02 , DOI: 10.1002/celc.201700923
Ramu Manikandan 1 , C. Justin Raj 1 , Murugesan Rajesh 1 , Byung Chul Kim 1, 2 , Ju Yong Sim 1 , Kook Hyun Yu 1
Affiliation  

A high‐performance symmetric supercapacitor was fabricated using a Na0.33V2O5 nanocomposite synthesized by means of a simple co‐precipitation technique. The structural and morphological investigation showed that the synthesized Na0.33V2O5 nanocomposite exhibited a monoclinic structure with a nanorod‐like morphology. The electrochemical properties of the Na0.33V2O5 symmetric supercapacitor were studied utilizing three different aqueous electrolytes, such as 1 M of LiCl, NaCl and KCl, respectively. Interestingly, the fabricated Na0.33V2O5 symmetric supercapacitors exhibited excellent electrochemical capacitance behaviour in all the electrolytes with a maximum specific capacitance value of 168 F g−1 in 1 M LiCl, 146 F g−1 in 1 M NaCl and 132 F g−1 in 1 M KCl electrolytes at 0.5 A g−1 discharge current density. In addition, Na0.33V2O5 symmetric supercapacitors demonstrated an excellent cyclic stability in 1 M NaCl electrolyte with high capacitance retention of approximately 81 % after 50 000 charge/discharge cycles.

中文翻译:

高性能,高循环稳定性Na0.33V2O5对称伪电容器中锂,钠和钾离子电解质的电化学行为

使用Na 0.33 V 2 O 5纳米复合材料通过简单的共沉淀技术合成了高性能的对称超级电容器。结构和形态研究表明,合成的Na 0.33 V 2 O 5纳米复合材料表现出具有纳米棒状形态的单斜晶结构。利用三种不同的水性电解质(分别为1 M的LiCl NaCl和KCl)研究了Na 0.33 V 2 O 5对称超级电容器的电化学性能。有趣的是,制成的Na 0.33 V 2O 5对称超级电容器在所有电解质中均表现出优异的电化学电容性能,在1 M LiCl中的最大比电容值为168 F g -1,在1 M NaCl中的最大比电容值为146 F g -1,在1 M KCl电解质中的最大比电容值为132 F g -1在0.5 A g -1时的放电电流密度。此外,Na 0.33 V 2 O 5对称超级电容器在1 M NaCl电解质中表现出出色的循环稳定性,在5万次充/放电循环后,其高电容保持率约为81%。
更新日期:2017-11-02
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