期刊
NEW JOURNAL OF CHEMISTRY
卷 39, 期 12, 页码 9363-9371出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01872b
关键词
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资金
- Scientific Research Foundation for Returned Scholars, Ministry of Education of China
- International Technology Collaboration of Chengdu Science and Technology Division
- State Key Lab of Catalysis [N-14-1]
- Education Department of Sichuan Province [13ZA0193]
A Ni(OH)(2)/Vulcan XC-72 (XC-72) composite has been synthesized by a microwave assisted method; it demonstrated a high specific capacitance of 1560 F g(-1) at 1 A g(-1) with carbon nanotubes as conductive agents. Ni(OH)(2)/XC-72, activated carbon (AC) and non-woven fabric were, respectively, used as a positive electrode, a negative electrode and a separator to assemble an asymmetric supercapacitor. This AC//Ni(OH)(2)/XC-72 supercapacitor achieves a remarkable capacitance of 92.2 F g(-1) at a current density of 0.5 A g(-1), a maximum energy density of 36 W h kg(-1) and a power density of 490 W kg(-1) based on an active material in a 6 M KOH aqueous electrolyte with a negative/positive electrode mass ratio of 1.75 within a voltage window of 1.6 V. Furthermore, the capacitance of the unit supercapacitor remains 85% after 1000 charging-discharging cycles. These results indicate that the AC//Ni(OH)(2)/XC-72 supercapacitor is promising to be applied in a practical device for energy storage.
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