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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Analysis of Ordered Mesoporous Carbons with Discriminating Pore Structure by Removing the Template with KOH or HF
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Electrochemical Analysis of Ordered Mesoporous Carbons with Discriminating Pore Structure by Removing the Template with KOH or HF

机译：通过用KOH或HF去除模板来区分孔结构的有序介孔碳的电化学分析

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摘要

Ordered mesoporous carbon (OMC) were prepared via template approach using phenolic resol as thecarbon source, triblock copolymer as the organic precursor and tetraethyl orthosilicate (TEOS) as thetemplate. The OMC with different pore structures were obtained by removing the silicon template withHF and KOH. Their physical structures and electrochemical properties were investigated by nitrogenadsorption-desorption, transmission electron microscope and electrochemical measurements. Theresults showed that the OMC prepared by removing the template with HF (OMC-HF) possessed higher2 specific surface area (1844 m /g) and larger pore diameter (2.5nm) than OMC by removing thetemplate with KOH (OMC-KOH). The OMC-HF exhibited better electrochemical performances thanOMC-KOH when used as the electrode materials in electrochemical double-layer capacitors (EDLCs).The OMC-HF showed higher specific capacitance (154 F/g) than OMC-KOH (76F/g) at current densityup to 20A/g in 6 M KOH electrolyte, owing to its high specific surface area and optimized porestructure. The excellent capacitance performance made it as favorable electrode materials in EDLCsfor fast charge/discharge at high current density.
机译：通过模板法，以酚醛酚醛树脂为碳源，三嵌段共聚物为有机前驱体，原硅酸四乙酯（TEOS）为模板，制备了有序介孔碳（OMC）。通过用HF和KOH去除硅模板获得具有不同孔结构的OMC。通过氮吸附-解吸，透射电子显微镜和电化学测量研究了它们的物理结构和电化学性能。结果表明，与用KOH（OMC-KOH）去除模板相比，用HF去除模板（OMC-HF）制备的OMC具有更高的比表面积（1844m 2 / g）和更大的孔径（2.5nm）。当用作电化学双层电容器（EDLC）的电极材料时，OMC-HF的电化学性能优于OMC-KOH.OMC-HF的比电容（154 F / g）比OMC-KOH（76F / g）高由于其较高的比表面积和优化的孔结构，在6 M KOH电解质中的电流密度高达20A / g。优异的电容性能使其成为EDLC中良好的电极材料，可在高电流密度下快速充电/放电。

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