Journal
JOURNAL OF POWER SOURCES
Volume 245, Issue -, Pages 866-874Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.07.014
Keywords
Hematite; Graphitic carbon nitrides; Hollow microsphere; Ionic liquid; Supercapacitor
Funding
- National Nature Science Foundation of China [21007021, 21076099, 21177050, 21206060]
- China Postdoctoral Science Foundation [2012M510125]
- Jiangsu Province [1102118C]
- Doctoral Innovation Fund of Jiangsu [CXZZ12_0668]
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A route to fabricate the graphite-like C3N4 hybridized alpha-Fe2O3 (g-C3N4/alpha-Fe2O3) hollow microspheres is designed. This route develops an ionic liquid system containing iron ions for manufacturing the g-C3N4/alpha-Fe2O3 hollow microspheres by a novel and eco-friendly solvothermal method at low temperature condition. The effect of ionic liquids on the morphology of the g-C3N4/alpha-Fe2O3 hybrid composites has been investigated in detail. It is found that ionic liquid 1-butyl-3-methylimidazolium tetrachlorideferrate(III) [Bmim]FeCl4 is supposed to have the triple roles of reactant, dispersing media and template at the same time, and is vital for the structure of the g-C3N4/alpha-Fe2O3 hollow microspheres. In addition, the capacitance of the g-C3N4/alpha-Fe2O3 hollow microspheres as electrode materials for supercapacitors is tested by cyclic voltammetry and chronopotentiometry measurements. The g-C3N4/alpha-Fe2O3 hollow microspheres exhibit large specific capacitance, excellent cycling performance and high Coulombic efficiency. The designed g-C3N4/alpha-Fe2O3 hollow microspheres show potential applications in supercapacitors. (C) 2013 Elsevier B.V. All rights reserved.
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