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Controllable growth of graphene dendrite and application to electrochemical capacitors

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Abstract

Synthesis of graphene dendrites with controlled morphologies (flower-like and tree-like) were achieved by changing applied potential in electrochemical reaction. The growth of graphene dendrites proceeded with two different oriented attachment modes. When applied potential ≤60 V, graphene nanosheets preferentially extended into branches, resulting in the formation of flower-like dendrites. While applied potential ≥60 V, more graphene nanosheets were produced on electrode and grew along the stem directions, leading to the formation of tree-like dendrites. Moreover, the effects of different morphology of graphene dendrite on its electrochemical performances were investigated. The results showed that tree-like dendrite electrode had a larger specific capacitance (138 F/g at 100 mv/s) than that of flower-like dendrite electrode. Generally, graphene dendrites with controlled morphologies might have promising applications as electrode materials for supercapacitors.

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Acknowledgments

The authors thank the National High Technology Research and Development Program of China (No. 2012AA030303) and Basic Research Key Program of Shanghai (No. 12JC1408600).

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Authors and Affiliations

  1. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Material Science and Engineering, Tongji University, Caoan Road, Shanghai, 200092, People’s Republic of China

    Yanyun Liu, Junjun Zhang, Yu Shang, Yong Liu & Dong Zhang

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  1. Yanyun Liu
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  2. Junjun Zhang
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  3. Yu Shang
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  4. Yong Liu
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Correspondence to Dong Zhang.

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Liu, Y., Zhang, J., Shang, Y. et al. Controllable growth of graphene dendrite and application to electrochemical capacitors. J Mater Sci: Mater Electron 26, 4337–4343 (2015). https://doi.org/10.1007/s10854-015-2989-0

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