Journal of Sol-Gel Science and Technology

, Volume 63, Issue 1, pp 146–152 | Cite as

Three-dimensional flower-like nickel oxide supported on graphene sheets as electrode material for supercapacitors

Original Paper
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Abstract

Dispersed three-dimensional (3D) flower-like nickel oxide on graphene sheets was synthesized by incorporating a facile hydrothermal process with a thermal treatment process. The possible growth mechanism of 3D flower-like NiO is discussed. When used as electrode materials for supercapacitors, the resultant composite exhibits a specific capacitance of 346F/g (1.5A/g), a good rate performance and cycle stability in 2 M KOH. NiO in the composite could provide a specific capacitance as high as 778.7F/g, compared to that of bare NiO of only 220F/g. The functional features of unique 3D flower-like NiO morphology, high conductivity of graphene sheets and its protective effect to the structure of NiO result in an improved electrochemical performance.

Keywords

Graphene sheets NiO Supercapacitor Hydrothermal 
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Notes

Acknowledgments

This work was partly supported by National Natural Science Foundation of China (Grant No. 50802028), Hunan Provincial Natural Science Foundation of China (Grant No.10JJ2036), Research Foundation of Education Bureau of Hunan Province, China (Grant No. 09A036) and Innovation Platform Open Fund Projects in Higher Educational Institutions of Hunan Province (09K096).

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.College of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyangChina
  2. 2.College of Chemistry and Chemical EngineeringHunan UniversityChangshaChina

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