期刊
RSC ADVANCES
卷 6, 期 113, 页码 112307-112316出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra20871a
关键词
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资金
- National Natural Science Foundation of China [21572030, 21272033, 21402023]
- Technology Innovative Research Team of Sichuan Province of China [2015TD0005]
CoNi2S4@NiSe nano arrays with hierarchical structure are in situ prepared on compressed nickel foam for a high performance flexible supercapacitor by a three-step solution-based method which involves a one-step solvothermal process and a two-step hydrothermal process. During the preparation process, the nickel foam serves not only as a support but also as the nickel source for NiSe nanorods, which is beneficial for improving the electronic conductivity and reducing the contact resistant of the active materials/current collector. The CoNi2S4@NiSe nano arrays with ample active sites and porous structure contribute to increasing the electrochemical performance. The flexible supercapacitor based on CoNi2S4@NiSe nano arrays was prepared, which exhibits a high areal capacitance of 312.95 mF cm(-2) at a scan rate of 5 mV s(-1) and good cycling stability with 97.59% capacitance retention after 1000 cycles. Meanwhile, it also exhibits excellent electrochemical stability which can maintain great capacitive performance even in the bending state. Therefore, the CoNi2S4@NiSe nano arrays with hierarchical structure on the compressed nickel foam could be a promising electrode material for high performance flexible supercapacitors.
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