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Preparation of hierarchical porous polyacrylonitrile-based fiber sponges and electrochemical performance study

  • Energy materials
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Abstract

Electrospinning is a simple and effective technique for preparing carbon nanofibers. However, carbon nanofiber materials have some drawbacks, such as low specific surface area, small pore size, and low porosity, which can affect the electrochemical performance of supercapacitors. This article proposes a preparation method for a multi-level porous structure for thick electrodes. Sponge-like nanofibers are formed through electrospinning by adding a certain amount of PMMA to the polyacrylonitrile mixed spinning solution after doping with heteroatoms. After reverse hanging pre-oxidation and carbonization, a hierarchical porous, highly conductive, and flexible carbon nanofiber sponge is obtained. After testing, at a current density of 0.25 A g−1, its specific capacitance reached 207 F g−1. As the power density increased from 250 W kg−1 to 3997.89 W kg−1, the energy density changed from 28.73 W h kg−1 to 8.44 W h kg−1, demonstrating that the porous active carbon nanofiber sponge electrode has a significant energy storage advantage.

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Acknowledgements

This project was funded by the National Natural Science Foundation of China (Grant No. 11702169) and Class III Peak Discipline of Shanghai—Materials Science and Engineering (High-Energy Beam Intelligent Processing and Green Manufacturing) (Project No.19YF1417900).

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Authors and Affiliations

  1. School of Textiles and Fashion, Shanghai University of Engineering Science, Songjiang District, Shanghai, 201620, People’s Republic of China

    Yuchen Jiang, Md All Amin Newton, Binjie Xin, Wenjie Yu & Zan Lu

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  1. Yuchen Jiang
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  2. Md All Amin Newton
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  3. Binjie Xin
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  4. Wenjie Yu
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Correspondence to Binjie Xin.

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Jiang, Y., Newton, M.A.A., Xin, B. et al. Preparation of hierarchical porous polyacrylonitrile-based fiber sponges and electrochemical performance study. J Mater Sci 58, 17326–17339 (2023). https://doi.org/10.1007/s10853-023-09124-9

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  • DOI: https://doi.org/10.1007/s10853-023-09124-9

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