活化方式对有序介孔炭孔结构及电化学性能的影响

发布时间：2018-04-30 21:37

本文选题：介孔炭 + 活化方式　；参考：《新型炭材料》2017年02期

【摘要】：采用软模板法合成有序介孔炭(OMC),并通过不同的活化方式对OMC进行活化处理,以制备出具有较高比表面积的微/介孔炭材料。利用小角X射线衍射、氮气吸附、扫描及透射电镜对活化前后介孔炭的孔结构进行表征;循环伏安、恒流充放电、交流阻抗等方法测试其电化学性能。探讨不同活化方式对介孔炭孔结构和电化学性能的影响。结果表明:高温活化在保持介孔炭的有序性及其二维六角结构的基础上,在其孔隙结构中形成了大量微孔结构,有效地提高了介孔炭的孔体积及比表面积,比表面积由674 m~2/g提高到2 404 m~2/g,孔体积由0.98 cm~3/g提高到2.24 cm~3/g,并进一步提高了介孔炭的电化学性能,在500 mA/g电流密度下,其比电容可达175 F/g。活化方式对活化后的介孔炭的孔结构及电化学性能有很大的影响。
[Abstract]:The ordered mesoporous carbon (OMC) was synthesized by soft template method, and the OMC was activated by different activation methods to prepare micro / mesoporous carbon materials with high specific surface area. The pore structure of mesoporous carbon before and after activation was characterized by small angle X-ray diffraction, nitrogen adsorption, scanning electron microscopy, cyclic voltammetry, constant current charge-discharge and AC impedance. The effects of different activation modes on the pore structure and electrochemical properties of mesoporous carbon were investigated. The results show that on the basis of maintaining the order of mesoporous carbon and its two-dimensional hexagonal structure, the high temperature activation results in the formation of a large number of micropore structures in its pore structure, which effectively improves the pore volume and specific surface area of mesoporous carbon. The specific surface area was increased from 674 mm2 / g to 2 404 mm2 / g, and the pore volume was increased from 0.98 cm~3/g to 2.24 cm / g, and the electrochemical performance of mesoporous carbon was further improved. The specific capacitance of mesoporous carbon was up to 175F / g at 500 mA/g current density. The activation mode has great influence on the pore structure and electrochemical properties of activated mesoporous carbon.
【作者单位】：大连理工大学化工学院精细化工国家重点实验室炭素材料研究室;中国科学院大连化学物理研究所;
【基金】：国家自然科学基金(21176036,21276035,21107108,21376037) 国家高技术研究发展计划(863计划,2012AA03A611)~~
【分类号】：TQ127.11

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