Freestanding MnO2 nanoflakes/porous carbon nanofibers for high-performance flexible supercapacitor electrodes
2019/11/27 21:19:32
Zhou, D., H. M. Lin, F. Zhang, H. Niu, L. R. Cui, Q. Wang and F. Y. Qu
We report the facile synthesis of freestanding MnO2 nanoflakes/porous carbon nanofibers (MnO2/PCNFs) for high performance flexible supercapacitor electrodes. PCNFs are firstly synthesized via a electrospinning method using phenol-formaldehyde resin as the carbon precursor with tetraethyl orthosilicate and triblock copolymer Pluronic P123 as porous and soft templates, respectively. MnO2 nanoflakes are then in-situ deposited on PCNFs based on the self-limiting reaction between KMnO4 and carbon. The obtained MnO2/PCNF hybrid shows a porous structure with ultra-high specific surface area of 1814m(2) g (1), providing numerous electroactive sites to accommodate more charges. As a result, the MnO2/PCNF hybrid electrode exhibits extremely high specific capacitance (520 F g (1) at 0.5 A g (1)) and superior cycling stability (92.3% retention after 4000 cycles) in a 6M KOH aqueous solution. Such excellent electrochemical behavior may render this hybrid a promising candidate for flexible, freestanding and high-performance supercapacitor electrodes. (C) 2015 Elsevier Ltd. All rights reserved.
- Journal: Electrochimica Acta
- Volume: 161
- Issue:
- Pages: 427-435
- ISSN: 0013-4686
- DOI: 10.1016/j.electacta.2015.02.085
- Year: 2015
- Number:
- Type:
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