期刊
ENERGY
卷 106, 期 -, 页码 103-111出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.02.141
关键词
Ordered mesoporous carbon; Supercapacitor; RuO2-Fe2O3; Metal oxides; Nanoparticle; Electrochemistry
资金
- National Natural Science Funds for Distinguished Young Scholars [51025211]
- National Nature Science Foundation of China [50872071, 50972079]
- Shandong Natural Science Fund for Distinguished Young Scholars [JQ200915]
- Nature Science Foundation of Shandong Province [Y2007F03, Y2008F26]
- Foundation of Outstanding Young Scientists in Shandong Province [2006BS04030]
- Tai Shan Scholar Program of Shandong Province
- Gong Guan Foundation of Shandong Province [2008GG10003019]
- Doctor Foundation of Shandong Jianzhu University [XNBS 1434]
The electrode materials RuO2 or RuO2-Fe2O3 nanoparticle embedded OMC (ordered mesoporous carbon) are prepared by the method of impregnation and heating in situ. The mesoporous structure optimized the electron and proton conducting pathways, leading to the enhanced capacitive performances of the composite materials. The average nanoparticle size of RuO2 and RuO2-Fe2O3 is 2.54 and 1.96 nm, respectively. The fine RuO2-Fe2O3 nanoparticles are dispersed evenly in the pore channel wall of the two-dimensional mesoporous carbon without blocking the mesoporous channel, and they have a higher specific surface area, a larger pore volume, a proper pore size and a small charge transfer impedance value. The special electrochemical capacitance of RuO2-Fe2O3/OMC tested in acid electrolyte (H2SO4) is measured to be as high as 1668 F g(-1), which is higher than that of RuO2/OMC. Meanwhile, the super capacitor properties of the RuO2-Fe2O3/OMC composites show a good cycling performance of 93% capacitance retention (3000 cycles), a better reversibility, a higher energy density (134 Wh kg(-1)) and power density (4000 W kg(-1)). The composite electrode of RuO2-Fe2O3/OMC, which combines a double layer capacitance with pseudo-capacitance, is proved to be suitable for ideal high performance electrode material of a hybrid supercapacitor application.(C) 2016 Elsevier Ltd. All rights reserved.
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