Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 215, Issue -, Pages 121-126Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.05.026
Keywords
CuCo2S4 nanoparticles; Microwave method; Mesoporous; Asymmetric supercapacitor
Categories
Funding
- National Natural Science Foundation of China [21065010, 21365019]
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A simple, cost-effective, and ultrafast microwave method for preparing ternary Cu-Co sulfides (CuCo2S4) is reported for the first time. The electrochemical tests demonstrate the highest specific capacitance of 580 F g(-1) at 1 A g(-1), and an good cycling stability demonstrated by a 80% capacitance retention after 2000 cycles at a current of 5 A g(-1). An asymmetric supercapacitor based on CuCo2S4 as the positive electrode and activated carbon (AC) as negative electrode is successfully assembled, the CuCo2S4//AC-ASC demonstrates good cycle performance (similar to 99.5% capacitance after 6000 cycles) and high energy density (15 W h kg(-1) at a power density of 400 W kg(-1)) in the wide voltage region of 0-1.6 V. Meanwhile, two asymmetric supercapacitors links in series cannot only light a red light-emitting diode, but also drive a rotating motor.
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