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Flexible all-fiber electrospun supercapacitor

Liu, Xinhua; Naylor Marlow, Max; Cooper, Samuel J.; Song, Bowen; Chen, Xiaolong; Brandon, Nigel P.; Wu, Billy

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Authors

Xinhua Liu

Max Naylor Marlow

Samuel J. Cooper

Bowen Song

XIAOLONG CHEN XIAOLONG.CHEN@NOTTINGHAM.AC.UK
Assistant Professor in Sustainable Engineering

Nigel P. Brandon

Billy Wu



Abstract

We present an all-fiber flexible supercapacitor with composite nanofiber electrodes made via electrospinning and an electrospun separator. With the addition of manganese acetylacetonate (MnACAC) to polyacrylonitrile (PAN) as a precursor for the electrospinning process and subsequent heat treatment, the performance of pure PAN supercapacitors was improved from 90 F g−1 to 200 F g−1 (2.5 mV s−1) with possible mass loadings of MnACAC demonstrated as high as 40 wt%. X-ray diffraction measurements showed that after thermal treatment, the MnACAC was converted to MnO, meanwile, the thermal decomposition of MnACAC increased the graphitic degree of the carbonised PAN. Scanning electron microscopy and image processing showed that static electrospinning of pure PAN and PAN-Mn resulted in fiber diameters of 460 nm and 480 nm respectively after carbonisation. Further analysis showed that the fiber orientation exhibited a slight bias which was amplified with the addition of MnACAC. Use of focused ion beam scanning electron microscopy tomography also showed that MnO particles were evenly distributed through the fiber at low MnACAC concentrations, while at a 40 wt% loading the MnO particles were also visible on the surface. Comparison of the electrospun separators showed improved performance relative to a commercial Celgard separator (200 F g−1 vs 141 F g−1).

Citation

Liu, X., Naylor Marlow, M., Cooper, S. J., Song, B., Chen, X., Brandon, N. P., & Wu, B. (2018). Flexible all-fiber electrospun supercapacitor. Journal of Power Sources, 384, 264-269. https://doi.org/10.1016/j.jpowsour.2018.02.081

Journal Article Type Article
Acceptance Date Feb 25, 2018
Online Publication Date Mar 23, 2018
Publication Date Apr 30, 2018
Deposit Date Aug 3, 2023
Publicly Available Date Aug 3, 2023
Journal Journal of Power Sources
Print ISSN 0378-7753
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 384
Pages 264-269
DOI https://doi.org/10.1016/j.jpowsour.2018.02.081
Public URL https://nottingham-repository.worktribe.com/output/23785745
Publisher URL https://www.sciencedirect.com/science/article/pii/S0378775318302003

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