Journal of Power Sources ( IF 8.1 ) Pub Date : 2020-02-05 , DOI: 10.1016/j.jpowsour.2020.227793 Yayun Zheng , Yunrui Tian , Shatila Sarwar , Jujie Luo , Xinyu Zhang
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This work reports the fabrication of carbon nanotube (CNT) decorated NiSe2 nanosheets (NiSe2@CNT) by a rapid microwave process in 2 min. Interestingly, NiSe2@CNT has a lamellar and tubular interwoven morphology. The specific capacitance of the prepared electrodes with different microwave conditions for supercapacitors were studied. Meanwhile, we compared the electrochemical performances of NiSe2@CNT with the presence of different amount of CNT. The optimal NiSe2@CNT electrode can demonstrate a high specific capacitance of 980.5 F g−1 at a current density of 1 A g−1 and good cycling stability of 82% retention after 9000 cycles at 5 A g−1. In addition, an asymmetric supercapacitor was assembled by NiSe2@CNT as positive electrode and activated carbon (AC) as negative electrode, which successfully light four white light emitting diodes (LEDs) for 6 min with an energy density of 25.61 Wh kg−1 at a power density of 810 W kg−1.
中文翻译:
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碳纳米管装饰NiSe 2纳米片,用于高性能超级电容器
这项工作报告了通过快速微波处理在2分钟内制造碳纳米管(CNT)装饰的NiSe 2纳米片(NiSe 2 @CNT)。有趣的是,NiSe 2 @CNT具有层状和管状的交织形态。研究了在不同微波条件下制备的超级电容器电极的比电容。同时,我们比较了不同数量的CNT存在下NiSe 2 @CNT的电化学性能。最佳的NiSe 2 @CNT电极 在1 A g -1的电流密度下可显示980.5 F g -1的高比电容,在5 A g -1的9000次循环后保持82%的良好循环稳定性。另外,以NiSe 2 @CNT为正极并以活性炭(AC)为负极组装了不对称超级电容器,其以25.61 Wh kg -1的能量密度成功地点亮了四个白色发光二极管(LED)6分钟。在810 W kg -1的功率密度下。