Carbon nanotubes decorated NiSe2 nanosheets for high-performance supercapacitors

• Published in: Journal of power sources Vol. 452; p. 227793
• Main Authors: Zheng, Yayun, Tian, Yunrui, Sarwar, Shatila, Luo, Jujie, Zhang, Xinyu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.03.2020
• Subjects: Carbon nanotubes; Microwave; NiSe2; Supercapacitor; Carbon nanotubes; Microwave; Supercapacitor; NiSe2
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2020.227793

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. [Display omitted] •CNT decorated NiSe2 nanosheets were fabricated by microwave method in 2 min.•The NiSe2@CNT electrode exhibited a excellent long-term cycling stability.•The NiSe2@CNT//AC asymmetric supercapacitor can light up to four LEDs and last for 6 min.