Ravi Seenu, Gopi Chandu V V M, Kim Hee Je
School of Electrical Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 46241, South Korea.
Dalton Trans. 2016 Aug 2;45(31):12362-71. doi: 10.1039/c6dt01664b.
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.
高性能超级电容器独特的核/壳异质结构的设计与合成已受到广泛关注。我们制备了独特的异质结构，即在泡沫镍上的碳纳米管网络（CuS@CNT）上包覆聚酰亚胺的硫化铜，这是通过一种简便且经济高效的溶剂热法结合浸涂工艺实现的。使用溶剂热法，以二甲基甲酰胺和蒸馏水为溶剂，将六方纤锌矿型CuS纳米颗粒分散在碳纳米管上。对合成的CuS和CuS@CNT超级电容器电极材料进行了全面表征。聚合物负载电极（PIM/CuS@CNT）在电流密度为1.2 A g(-1)时显示出1.51 F cm(-2)的高面积电容，高于CuS@CNT电极以及许多先前报道的CuS电极材料。在1.2 A g(-1)的高电流密度下循环1000次后，保留率为92%，表明具有良好的长期循环稳定性。这些结果表明PIM/CuS@CNT电极在高性能超级电容器应用方面具有前景。
