Abstract:

Ordered mesoporous carbon was made from preasphaltene derived from coal liquefaction, with SBA-15 used as template.The microstructure and capacitance properties of the as-made ordered mesoporous carbon (OMC) were investigated with XRD, TEM, N₂ adsorption and electrochemical workstation.The results showed that the OMC had partially graphitized and well-ordered hexagonal structure that was a reverse replication of the template.The specific surface area of the OMC was 542 m²·g^-1 with a pore volume of 0.479 cm³·g^-1 and a narrow pore size distribution centering at 3.5 nm.The properties of the capacitor electrodes assembled from the OMC were tested in a three-electrodes system, showing that the OMC was a promising capacitor electrode material, of which the specific capacitance of single electrode at 1 mA was up to 310 F·g^-1.

Key words:

预沥青烯, 模板法, 中孔炭, 电化学性能

摘要：

以预沥青烯为碳源、SBA-15为模板，采用模板法合成了结构有序的中孔炭材料。用XRD、TEM、N₂吸附和电化学工作站等对中孔炭的微观结构及电化学性能进行了研究。结果表明，以预沥青烯为碳源合成的炭材料具有高度有序的二维六方孔道和一定的石墨化程度，它反转复制了模板SBA-15的结构。中孔炭的比表面积为542 m²·g^-1，孔容为0.479 cm³·g^-1，孔径呈单峰分布，集中在3.5 nm左右。这种预沥青烯基中孔炭作为电化学电容器电极材料，显示出良好的性能，在1 mA的电流强度下其单电极质量比电容高达310 F·g^-1。

关键词:

预沥青烯, 模板法, 中孔炭, 电化学性能