Journal
DALTON TRANSACTIONS
Volume 45, Issue 48, Pages 19458-19465Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt03863h
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Funding
- Natural Science Foundation of China [U1407103, 21671205]
- Collaborative Innovation Centre of Henan Textile and Clothing Industry, Henan Province [15HASTIT003]
- Zhengzhou University [1421316035]
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Large-scale uniform Ni-Co-Se bimetallic ternary nanowires have been successfully synthesized through a successive cation exchange. First, NiSe nanowires in situ grown on nickel foam (NF) were prepared by a facile solvothermal route. Next, a series of ternary materials possessing different proportions of Ni and Co were fabricated by a Co-exchange method using the Ni@NiSe material as a template, which effectively achieved morphological inheritance from the parent material. To explore the electrochemical performance, all synthetic materials were assembled into asymmetric supercapacitor devices. Among asymmetric supercapacitor devices, the Ni@Ni0.8Co0.2Se//active carbon (AC) device exhibited a high specific capacitance of 86 F g(-1) at a current density of 1 A g(-1) and excellent cycling stability with virtually no decrease in capacitance after 2000 continuous charge-discharge cycles. This device still delivered an energy density of 17 Wh kg(-1) even at a high power density of 1526.8 W kg(-1). These superior electrochemical properties of Ni@Ni0.8Co0.2Se as an electrode material for supercapacitor devices confirmed the synergistic effect between Co and Ni ions, suggesting their potential application in the field of energy storage.
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