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以酚醛树脂为原料,二氧化硅为模板,尿素为氮源,通过简单的混合、炭化、脱模板制备了掺氮中孔炭。采用透射电镜、物理吸附技术、红外及元素分析对产品的孔结构及组成进行了分析;利用三电极体系,测试了材料的循环伏安、交流阻抗、恒流充放电性能。结果表明,所得氮掺杂中孔炭具有较高的比表面积及比孔容,比表面积为938~1 212 m~2/g,比孔容为2.19~2.68cm~3/g,平均孔径为8.8~9.3 nm。较低的炭化温度利于固氮,700℃下炭化的样品氮含量为2.38%。在电解质为6 mol/L的KOH溶液的三电极体系、电流密度为50 mA/g下,700℃炭化得到的中孔炭比电容值达200 F/g。
Using phenolic resin as raw material, silica as template and urea as nitrogen source, a nitrogen-doped mesoporous carbon was prepared by simple mixing, carbonization and stripper. The pore structure and composition of the product were analyzed by TEM, physical adsorption, IR and elemental analysis. The cyclic voltammetry, AC impedance and constant current charge-discharge performance of the material were tested by the three-electrode system. The results show that the obtained nitrogen-doped mesoporous carbon has higher specific surface area and specific pore volume, specific surface area of 938 ~ 1 212 m ~ 2 / g, specific pore volume of 2.19 ~ 2.68cm ~ 3 / g and average pore diameter of 8.8 ~ 9.3 nm. The lower carbonization temperature favors nitrogen fixation, and the nitrogen content of the sample carbonized at 700 ℃ is 2.38%. In the three-electrode system with 6 mol / L KOH electrolyte, the specific capacitance of mesoporous carbon obtained by carbonization at 700 ℃ was 200 F / g at a current density of 50 mA / g.