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Three-dimensional graphene nanosheets supported by NiO/Si-MCP as electrode materials for high-performance supercapacitors

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Abstract

A three-dimensional (3D) graphene/NiO/Si-microchannel (MCP) composite electrode is synthesized by the conventional microelectronic machining process and electrochemical exfoliation technology for electrochemical capacitors. SEM, AFM, and Raman scattering are used to investigate the morphology and structure, and electrochemical characterization reveals that the 3D graphene/NiO/Si-MCP has a high specific capacitance of 833 Fg−1 at a current density of 5 Ag−1 in 6 mol L−1 KOH. Moreover, good cycling performance with 92% capacitance retention after 1000 cycles is observed indicating the novel electrode has large potential in high-performance supercapacitors.

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Acknowledgements

This work was jointly supported by the National Natural Science Foundation of China (Grant Nos. 61204127, 81172204, and 81271628), Natural Science Foundation of Heilongjiang Province (Grant Nos. F201332 and F201438), New Century Excellent Talents in Heilongjiang Provincial University (Grant No. 1253-NECT025), Science and Technology Project of Qiqihar (Grant GYGG-201409), postdoctoral scientific research developmental fund of Heilongjiang Province (Grant No. LBH-Q15142 and LBH-Q14157), higher school science and technology achievements industrialization pre-research and development foundation of Heilongjiang Province (Grant No. 1254CGZH04), and City University of Hong Kong Applied Research (Grant (ARG) No. 9667122).

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Correspondence to Bairui Tao or Fengjuan Miao.

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Tao, B., Shao, H., Yu, J. et al. Three-dimensional graphene nanosheets supported by NiO/Si-MCP as electrode materials for high-performance supercapacitors. Ionics 23, 2185–2191 (2017). https://doi.org/10.1007/s11581-017-2050-9

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