Ordered mesoporous carbon/SnO2 composites as the electrode material for supercapacitors
A series of composites as electrode materials for supercapacitors were prepared via incipient wetness impregnation method utilizing ordered mesoporous carbon (OMC) and tin (IV) oxide (SnO2) with different ratio. The structure and electrochemical properties of the OMC/SnO2 composites were characterized by XRD, TEM and cyclic voltammetry (CV). Pore characteristics were measured by nitrogen adsorption and desorption isotherms. The results show that the structure and electrochemical properties of the composites depend mainly on the loading amount of SnO2 in the ordered mesoporous carbon. The optimum amount of SnCl4 added is found to be 40 % (1.54 g ethanol-based SnCl4·5H2O added to 1 g OMC) of the saturated solution. The specific capacitance of the composite of optimum amount of SnCl4 (200 F g−1) is nearly three times of that of the pristine SnO2 (72 F g−1) at the scan rate of 5 mV s−1, and its specific capacitance is almost equal to that of the ordered mesoporous carbon (126 F g−1) at the scan rate of 200 mV s−1. Meanwhile, it has better specific volumetric energy density than OMC due to its higher density. Besides, in the potential range of 0–0.9 V the composite electrode material exhibits a stable cycle life after 500 cycles.
Key wordssupercapacitors composite tin oxide electrochemical properties
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- B E Conway. Electrochemical Supercapacitors, Scientific Fundamentals and Technological Applications [M].New York: Kluwer Academic/Plenum Publishers, 1997Google Scholar
- L X Li, H H Song, X H Chen. Pore Characteristics and Electrochemical Performance of Ordered Mesoporous Carbons for Electric Double-layer Capacitors [J]. Electrochimica Acta, 2006, 51: 5 715–5 720Google Scholar
- R R Jiang, T Huang, J H Zhuang. A Novel Method to Prepare Nanostructured Manganese Dioxide and Its Electrochemical Properties as a Supercapacitor Electrode [J]. Electrochimica Acta, 2009, 54: 3 047–3 052Google Scholar
- Y Zhang, Y H Gui, X B Wu, et al. Preparation of Nanostructures NiO and Their Electrochemical Capacitive Behaviors [J]. International Journal of Hydrogen Energy, 2009, 34: 2 467–2 470Google Scholar
- C O Park, S A Akbar.Ceramics for Chemical Sensors [J]. Journal of Materials Science, 2003, 38: 4 611–4 612Google Scholar
- C Nasr, S Hotchandani, P V Kamat. Role of Iodide in Photoelectrochemical Solar Cells Electron Transfer Between Iodide Ions and Ruthenium Polypyridyl Complex Anchored on Nanocrystalline SiO2 and SnO2 Films [J]. Journal of Physical Chemistry B, 1998, 102: 10 047–10 048Google Scholar
- J Zhu, B Y Tay, J Ma. Synthesis of Mesoporous Tin Oxide on Neutral Surfactant Templates [J]. Journal of Materials Letters, 2006, 60: 1 003–1 010Google Scholar
- D Y Zhao, Q S Huo, J L Feng, et al. Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures [J]. Journal of the Electrochemical Society, 1998, 120: 6 024–6 036Google Scholar
- M Kruk, M Jaroniec, R Ryoo, et al. Synthesis and Characterization of Hexagonally Ordered Carbon Nanopipes [J].Journal of the Electrochemical Society,2003,15(14): 2 815–2 823Google Scholar
- A H Lu, W C Li, W Schmidt, et al. Easy Synthesis of an Ordered Mesoporous Carbon with a Hexagonally Packed Tubular Structure [J]. Carbon, 2004, 42: 2 939–2 948Google Scholar