期刊
RSC ADVANCES
卷 7, 期 79, 页码 50358-50366出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra09119b
关键词
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资金
- Beijing Municipal Science and Technology Project [Z161100001116080]
- National Key Scientific Instrument and Equipment Development Projects [2014YQ090709]
- NSFC [21673273, 21103030]
- Major Project of the Ministry of Science and Technology [2016YFA0200904]
Iron oxide nanoparticles intercalated in Ni(OH)(2) nanosheets were prepared in a spontaneous way for the cathode materials of asymmetric supercapacitors. The soluble precursor of Ni(OH)(2), Ni(NH3)(6)(OH)(2), was used for growth on alpha-Fe2O3 nanoparticles. The loading percentages of Ni(OH)(2) in the Ni(OH)(2)-alpha-Fe2O3 nanocomposites had a great influence on the morphology and size of Ni(OH)(2). The composites were characterized by TEM, SEM, ICP-OES, XRD and XPS. The specific capacitance of Ni(OH)(2) in the composite can reach 1107 F g(-1) at a scan rate of 20 mV s(-1), and the specific capacitance of the Ni(OH)(2)-alpha-Fe2O3 composite can be up to 376 F g(-1) at a scan rate of 5 mV s(-1). More importantly, the fabricated Ni(OH)(2)-alpha-Fe2O3//AC (activated carbon) asymmetric supercapacitor exhibited energy density and power density of 31.6 W h Kg(-1) and 474 W Kg(-1), respectively. The cycling performance of the asymmetric supercapacitor was also excellent, and the capacitance retention reached 89.6% after 5000 charge-discharge cycles. Red, blue and yellow LED lights can be lit up with two series of asymmetric supercapacitors, revealing their potential application in energy storage.
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