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Preparation of graphene sponge with mechanical stability for compressible supercapacitor electrode

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Abstract

The graphene porous structure has attracted attention as an electrode material of an energy storage device because it has a high specific capacitance due to its excellent electrical properties and high surface area. This research suggests easy-to-fabricate graphene porous structure based on polymer sponge and graphene oxide (GO). The graphene sponge was made by hydrothermal synthesis of a polymer sponge and an aqueous dispersion of GO. The graphene sponge produced by inexpensive and simple method shows good electrochemical performance. Morphology and structural properties of graphene sponge were investigated by field effect scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Raman spectroscopy. The electrochemical performance was measured in 1 M KOH aqueous solution and showed good specific capacitance (214.06 F g−1) and ideal electric double-layer capacitor characteristics. This graphene sponge is flexible and can be applied to wearable devices and various next-generation energy storage devices.

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Acknowledgements

This subject is supported by Korea Ministry of Environment as “Global Top Project (2016002130005)” and Development of diagnostic system for mild cognitive impairment due to Alzheimer’s disease (2017-11-0951).

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Authors and Affiliations

  1. School of Mechanical Engineering, Yonsei University, Seoul, 120-749, South Korea

    Youngho Seo, Su Chan Lee, Jeong Seob Kang & Seong Chan Jun

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  1. Youngho Seo
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  2. Su Chan Lee
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  3. Jeong Seob Kang
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  4. Seong Chan Jun
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Correspondence to Seong Chan Jun.

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Seo, Y., Lee, S.C., Kang, J.S. et al. Preparation of graphene sponge with mechanical stability for compressible supercapacitor electrode. JMST Adv. 1, 81–87 (2019). https://doi.org/10.1007/s42791-019-0006-0

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  • DOI: https://doi.org/10.1007/s42791-019-0006-0

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