Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 8, Pages 4861-4868Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5088192
Keywords
Co9S8/RGO/Ni3S2 composites; supercapacitor; Ni foam; hydrothermal method; chemical redox
Funding
- Key Laboratory Project [B502, 08DZ2230500]
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Co9S8, Ni3S2, and reduced graphene oxide (RGO) were combined to construct a graphene composite with two mixed metal sulfide components. Co9S8/RGO/Ni3S2 composite films were hydrothermal-assisted synthesized on nickel foam (NF) by using a modified active metal substrate route in which nickel foam acted as both a substrate and Ni source for composite films. It is found that the Co9S8/RGO/Ni3S2/NF electrode exhibits superior capacitive performance with high capability (13.53 F cm(-2) at 20 mA cm(-2), i.e., 2611.9 F g(-1) at 3.9 A g(-1)), excellent rate capability, and enhanced electrochemical stability, with 91.7% retention after 1000 continuous charge-discharge cycles even at a high current density of 80 mA cm(-2).
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