多面体
超级电容器
材料科学
电容
组合数学
电极
数学
化学
物理化学
作者
M. Sangeetha Vidhya,R. Yuvakkumar,G. Ravi,Balasubramaniam Saravanakumar,Dhayalan Velauthapillai
出处
期刊:Nanoscale advances
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:3 (14): 4207-4215
被引量:26
摘要
The polyhedron-structured NiSe2@MoSe2 (NMS) were magnificently produced through hydrothermal method, which makes the active electrode very effective in accessing the redox active sites in the charge/discharge process in supercapacitor applications. Systematic studies of the structural and morphological features of the unique polyhedron NMS were performed. Laser Raman spectra reported the vibrational and rotational modes of NMS. NMS exhibited a maximum 1000 F g-1 (138.8 mA h g-1) specific capacitance at 1 A g-1 and attained a capacity retention of 77.67% for 5000 stable cycles at 10 A g-1 using 1 M KOH as an electrolyte. The well assembled asymmetric supercapacitor NMS hydrolyzed for 18 h//AC demonstrated an outstanding electrochemical performance with an improved 305 F g-1 specific capacitance attained at 1 A g-1 with a good cycle life of 87.35% and a capacity retention of over 5000 cycles. Herein, the combined contribution of both the Ni and Mo ions offers a richer redox chemistry, which is beneficial to a higher electrochemical activity. The experimental results indicate that the NMS electrode could be used as a high-performance electrode.
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