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Preparation of porous carbon electrodes from semen cassiae for high-performance electric double-layer capacitors

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Abstract

A series of sponge-like hierarchical porous carbons are prepared using semen cassiae as the precursor and potassium oxalate monohydrate as the activation agent. These sponge-like carbon materials have high surface areas, wide distributions of pore size, and the appropriate forms of nitrogen/oxygen derivatives. All these advantages in structures and surface states contribute to the outstanding performances of such materials as electrodes for high performance electric double-layer capacitors, which include high specific capacitance, high cycling stability, and high energy density. For example, the optimal sample exhibits a high specific capacitance of 401 F g−1, excellent cycling stability (94.5% retention after 10 000 cycles), high energy density (12.01 W h kg−1) and a high power density (10 200 W kg−1) in 1 M H2SO4 solution.

Graphical abstract: Preparation of porous carbon electrodes from semen cassiae for high-performance electric double-layer capacitors

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Publication details

The article was received on 12 Dec 2017, accepted on 19 Mar 2018 and first published on 05 Apr 2018


Article type: Paper
DOI: 10.1039/C7NJ04922F
Citation: New J. Chem., 2018, Advance Article
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    Preparation of porous carbon electrodes from semen cassiae for high-performance electric double-layer capacitors

    J. Wei, S. Wan, P. Zhang, H. Ding, X. Chen, H. Xiong, S. Gao and X. Wei, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ04922F

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