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Citation: XU Huan, HU Zhongai, HU Yingying, LU Ailian, LI Li, YANG Yuying, LI Zhimin. Solvothermal Synthesis and Performances of NiO/Reduced Graphene Oxide for Supercapacitor Electrode Material with Long Cycle Stability[J]. Chinese Journal of Applied Chemistry, ;2014, 31(3): 328-335. doi: 10.3724/SP.J.1095.2014.30181 shu

Solvothermal Synthesis and Performances of NiO/Reduced Graphene Oxide for Supercapacitor Electrode Material with Long Cycle Stability

XU Huan ^a ,
HU Zhongai ^b,, ,
HU Yingying ^b ,
LU Ailian ^b ,
LI Li ^b ,
YANG Yuying ^b ,
LI Zhimin ^b

1.
a College of Arts and Sciences, Ningxia Institute of Science and Technology, Shizuishan 753000;
2.
b Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China

Corresponding author: HU Zhongai,
Received Date: 15 April 2013
Available Online: 15 April 2013
Fund Project: 国家自然科学基金基金(20963009,21163017) (20963009,21163017)高等学校博士学科点专项科研基金(20126203110001)资助项目 (20126203110001)

The NiO nanoflowers and NiO/reduced graphene oxide(rGO) composite were synthesized by a facile solvothermal process following thermal treatments.In the NiO/rGO composite,rGO was used as the substrate to fix NiO while the NiO acted as the spacer to prevent the aggregation of rGO.The composition,morphology and microstructure of the as-obtained samples were systematically characterized by thermogravimetric(TG) analysis,field emission scanning electron microscopy(FE-SEM) and X-ray diffraction(XRD).When NiO/rGO composite(the mass ratio of NiO to rGO is up to 82.7:17.3) was used as a single electrode,it exhibited excellent electrochemical performance.At 1 A/g,the initial specific capacitance was 514.9 F/g.When the material was fully activated,the specific capacitance was high(up to 600 F/g).Meanwhile,at the current density of 10 A/g,there is 83.5% retention in the capacitance relative to 1 A/g.In addition,the electrode material exhibits excellent recyclic stability,the capacitance decay rate is only 7.4% after 6000 cycles.Thus,the as-prepared composite has the practical value in supercapacitors.
- NiO,
- reduced graphene oxide,
- solvothermal method,
- composite electrode material
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