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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Enhanced electrochemical capacitance of polyimidazole coated covellite CuS dispersed CNT composite materials for application in supercapacitors
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Enhanced electrochemical capacitance of polyimidazole coated covellite CuS dispersed CNT composite materials for application in supercapacitors

机译：用于超级电容器的聚咪唑包覆的Covellite CuS分散的CNT复合材料的电化学电容增强

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摘要

Great attention has been paid to the design and synthesis of distinct core/shell heterostructures for high-performance supercapacitors. We have prepared unique heterostructures consisting of polyimidazole-coated copper sulphide over a carbon nanotube network (CuS@CNT) on nickel foam, which was accomplished through a facile and cost-effective solvothermal method combined with a dip coating process. Hexagonal covellite CuS nanoparticles were dispersed on CNTs using a solvothermal method where dimethylformamide and distilled water were used as solvents. The synthesized CuS and CuS@CNT supercapacitor electrode materials were thoroughly characterized. The polymer supported electrode (PIM/CuS@CNT) shows a high areal capacitance of 1.51 F cm(-2) at a current density of 1.2 A g(-1), which is higher than the CuS@CNT electrode and many other previously reported CuS electrode materials. After 1000 cycles at a high current density of 1.2 A g(-1), the retention rate is 92%, indicating good long-term cycling stability. These results indicate that the PIM/CuS@CNT electrode is promising for high-performance supercapacitor applications.
机译：高性能超级电容器的独特核/壳异质结构的设计和合成已引起极大关注。我们已经在泡沫镍上的碳纳米管网络（CuS @ CNT）上制备了由聚咪唑涂层的硫化铜组成的独特异质结构，这是通过一种简便且经济高效的溶剂热方法与浸涂工艺相结合而实现的。使用溶剂热法将六角形的Covellite CuS纳米颗粒分散在CNT上，其中使用二甲基甲酰胺和蒸馏水作为溶剂。对合成的CuS和CuS @ CNT超级电容器电极材料进行了全面表征。聚合物支撑电极（PIM / CuS @ CNT）在1.2 A g（-1）的电流密度下显示出1.51 F cm（-2）的高面电容，该电容高于CuS @ CNT电极和其他许多以前的电极报告了CuS电极材料。在1.2 A g（-1）的高电流密度下进行1000次循环后，保留率为92％，表明良好的长期循环稳定性。这些结果表明，PIM / CuS @ CNT电极有望用于高性能超级电容器应用。

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