氮掺杂中孔炭的制备及其电化学性能研究

发布时间：2018-06-30 06:37

  本文选题：氮掺杂中孔炭 + 制备　； 参考：《炭素技术》2017年03期

【摘要】：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。
[Abstract]:Nitrogen-doped mesoporous carbon was prepared from phenolic resin as raw material, silica as template and urea as nitrogen source. The pore structure and composition of the product were analyzed by transmission electron microscopy, physical adsorption, IR and elemental analysis, and the cyclic voltammetry, AC impedance and constant current charge-discharge properties were tested by three-electrode system. The results show that the nitrogen-doped mesoporous carbon has a high specific surface area and specific pore volume, with a specific surface area of 9381,212 mm2 / g, a specific pore volume of 2.19 ~ 2.68 cm-1 / g and an average pore size of 8.8 ~ 9.3 nm / g. The lower carbonization temperature is propitious to the nitrogen content of the carbonized sample at 700 鈩，

本文编号：2085343