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Issue 15, 2014
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Fabrication of porous carbon spheres for high-performance electrochemical capacitors

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Abstract

Porous carbon spheres (PCS) with meso/microporous structure are designed and fabricated through a facile hydrothermal method by employing glucose as a carbon precursor and sodium molybdate (Na2MoO4) as a porogen, structure-direct agent and catalyst. With the assistance of Na2MoO4, the porous structure of the carbon sphere is significantly enhanced. In addition, the meso/microporous structure can be modulated by adjusting the proportion of the reactants. In optimal conditions, the PCS exhibit a high specific surface area (SSA, 757.3 m2 g−1) and pore volume (0.24 cm3 g−1). When evaluated as an electrode for electrochemical capacitors, the PCS exhibits a high specific capacitance of 260 F g−1 with remarkable high-rate performance and long-term cycling stability. The excellent electrochemical performances are exclusively attributed to the micro/mesoporous structure, which maximize the ion accumulation on the electrode surface and facilitate fast ion transportation. The well-defined porous nanostructure plus easy strategy make current study provide new opportunities for hydrothermal carbonization of biomass as electrode materials for energy storage.

Graphical abstract: Fabrication of porous carbon spheres for high-performance electrochemical capacitors

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Publication details

The article was received on 12 Aug 2013, accepted on 23 Dec 2013 and first published on 09 Jan 2014


Article type: Paper
DOI: 10.1039/C3RA44305A
Citation: RSC Adv., 2014,4, 7538-7544
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    Fabrication of porous carbon spheres for high-performance electrochemical capacitors

    J. Wang, L. Shen, B. Ding, P. Nie, H. Deng, H. Dou and X. Zhang, RSC Adv., 2014, 4, 7538
    DOI: 10.1039/C3RA44305A

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