TANG Li, ZHAN Liang, YANG Guang-zhi, YANG Jun-he, WANG Yan-li, QIAO Wen-min, . Preparation of mesoporous carbon microsphere/activated carbon composite for electric double-layer capacitors. New Carbon Mater., 2011, 26(3): 237-240. doi: 10.1016/S1872-5805(11)60079-6
Citation:
TANG Li, ZHAN Liang, YANG Guang-zhi, YANG Jun-he, WANG Yan-li, QIAO Wen-min, . Preparation of mesoporous carbon microsphere/activated carbon composite for electric double-layer capacitors. New Carbon Mater., 2011, 26(3): 237-240. doi: 10.1016/S1872-5805(11)60079-6
TANG Li, ZHAN Liang, YANG Guang-zhi, YANG Jun-he, WANG Yan-li, QIAO Wen-min, . Preparation of mesoporous carbon microsphere/activated carbon composite for electric double-layer capacitors. New Carbon Mater., 2011, 26(3): 237-240. doi: 10.1016/S1872-5805(11)60079-6
Citation:
TANG Li, ZHAN Liang, YANG Guang-zhi, YANG Jun-he, WANG Yan-li, QIAO Wen-min, . Preparation of mesoporous carbon microsphere/activated carbon composite for electric double-layer capacitors. New Carbon Mater., 2011, 26(3): 237-240. doi: 10.1016/S1872-5805(11)60079-6
1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China|
2.
School of Material Science and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China
Funds:
National Science Foundation of China (50730003, 50672025, 20806024 and 51002051), Fundamental Research Funds for the Central Universities (WA1014016) and Research Fund of China 863 program (2008AA062302).
Mesoporous carbon microspheres (MCMs) with specific surface area and diameter of 1850m2/g and 1μm, respectively, were synthesized using the solvothermal method. When mass fraction 20% of these were added to a high surface area-activated carbon (HSAC: 3200m2/g) its interfacial resistance and ion diffusion resistance decreased significantly. The specific capacitance of the composite electrode is 230F/g in 6mol/L KOH electrolyte, whereas those of pure HSAC and MCMs are only 190 and 148F/g, respectively, at a high current density of 12A/g. The improvement in electrochemical performance of the HSAC electrode at high current densities is attributed to the small particle diameter, mesoporous structure and high specific surface area of the added MCMs.
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