Fabrication of porous carbon spheres for high-performance electrochemical capacitors

Jie Wang, Laifa Shen, Bing Ding, Ping Nie, Haifu Deng, Hui Dou, Xiaogang Zhang

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

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 Na 2MoO4, 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.

Original languageEnglish
Pages (from-to)7538-7544
Number of pages7
JournalRSC Advances
Volume4
Issue number15
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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