| 同步合成模板法制备热解炭及其电化学电容性能研究 |
| Study of Preparation and Electrochemical Capacitance Performance of Pyrolytic Carbon through Synchronously Synthetical Template Method |
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| 摘要: 研究制备新型炭材料是提高电化学电容器性能的有效途径。本文以二氧化硅干凝胶为模板,以合成间苯二酚-甲醛(RF)干凝胶为炭前驱体,采用同步合成模板法制得了比表面积达1100m2·g-1,孔径分布集中,平均孔径为4.5nm的炭材料。循环伏安研究表明,与比表面积为1720m2·g-1的活性炭相比,本研究制得的炭材料具有更优异的电化学电容性能,2mV·s-1时比容量达195F·g-1。 |
| 关键词: 同步合成模板法 混合二氧化硅-酚醛干凝胶 热解炭 电化学电容器 |
| 基金项目: |
| Abstract: A new synchronously synthetical template method (SSTM) was brought forward to prepare carbon materials possessing controllable pore structure by mixing two sol-gel reactions, TEOS and resorcinol-formaldehyde in this paper. To testify the function of silica template to the formation of the pore structure of SSTM carbon, RF carbon by the pyrolysis of resorcinol-formaldehyde xerogel was also produced. N2 sorption at 77K investigation showed that specific surface and average pore size of SSTM carbon were 1100m2·g-1 and 4.5nm respectively, and its pore size distribution was very concentrative. The special structure of SSTM carbon was attributed to the simultaneous for-mation of template material (silica aquagel) and carbon precursor(resorcinol-formaldehyde aquagel). Voltage sweep cyclic voltametry was applied to investigate the electrochemical capacitance performance of SSTM carbon and T82 active carbon(1720m2·g-1) parallel. SSTM carbon exhibited more excellent electrochemical capacitance perfor-mance, 195F·g-1 at 2mV·s-1, than that of T82 carbon, 150F·g-1 at the same scan rate, although the specific surface of T82 carbon was much larger than that of SSTM carbon. Furthermore, the former exhibited better high current charge/discharge performance than the latter. Different characteristics of pore structures of the two carbons resulted in the difference of their electrochemical capacitance performance. |
| Keywords: synchronously synthetical template method mixing xerogel of silica and resorcinol-formaldehyde pyrolytic carbon electrochemical capacitor |
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| 侯朝辉,李新海,刘恩辉,何则强,邓凌峰.同步合成模板法制备热解炭及其电化学电容性能研究[J].无机化学学报,2003,19(9):929-933. |
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