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Issue 5, 2017
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A high-performance supercapacitor based on activated carbon fibers with an optimized pore structure and oxygen-containing functional groups

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Abstract

Low-cost activated carbon fibers (ACFs) were prepared from polyacrylonitrile-based precursor fibers abandoned by local factories via carbonization and CO2 activation. Oxygen-containing functional groups were introduced on the ACF surface via nitric acid and thermal treatment. ACFs with optimized pore structures and oxygen-containing functional groups display a remarkable capacitance of 214 F g−1 at a current density of 0.5 mA cm−2 and present an excellent cycling performance with a capacity retention of almost 100% over 3000 cycles. Moreover, the rate capability gains a significant improvement due to the existence of functional groups. The superb electrochemical performance of these materials provides a template of how to better engineer the ACFs' pore architecture and surface modifications to design enhanced electrode materials for high-performance supercapacitors.

Graphical abstract: A high-performance supercapacitor based on activated carbon fibers with an optimized pore structure and oxygen-containing functional groups

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Publication details

The article was received on 01 Sep 2016, accepted on 23 Nov 2016 and first published on 14 Dec 2016


Article type: Research Article
DOI: 10.1039/C6QM00196C
Citation: Mater. Chem. Front., 2017,1, 958-966
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    A high-performance supercapacitor based on activated carbon fibers with an optimized pore structure and oxygen-containing functional groups

    K. Zhu, Y. Wang, J. A. Tang, S. Guo, Z. Gao, Y. Wei, G. Chen and Y. Gao, Mater. Chem. Front., 2017, 1, 958
    DOI: 10.1039/C6QM00196C

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