【摘要】 以土豆为碳源,乙二胺为氮源,氢氧化钾为活化剂制备具有微孔结构高比表面积氮掺杂活性炭。通过N₂物理吸附、扫描电镜、透射电镜、拉曼光谱和元素分析研究活性炭比表面积、孔结构、形貌及元素组成,并测试其电化学性能。结果表明,当碱碳质量比为5∶1时（NC600-800-5）,活性炭材料比表面积最高2 440 m²·g^-1、孔容最大1.07 cm³·g^-1、孔径最大0.82 nm和1.80 nm。电流密度1 A·g^-1时比电容可达370 F·g^-1,经3 000次循环充放电后,比电容保持率为95.2%。更多还原

【Abstract】 Nitrogen-doped activated carbons with microporous structure and high surface areas were prepared using potato as carbon source,ethylenediamine as nitrogen source and KOH as activated agent.Specific surface areas,pore structures,morphologies and compositions of the carbons were characterized by N₂ adsorption-desorption,SEM,TEM and Raman Spectroscopy. Electrochemical properties of the materials were characterized by cyclic voltammetry and galvanostatic charge-discharge. The results indicate that when mass ratio of KOH to carbon is 5∶ 1（ NC600-800-5）,specific surface area of activated carbon material can be as high as 2 440 m²·g^-1,total pore volume can reach 1. 07 cm³·g^-1 and pore sizes can be 0. 82 nm and 1. 80 nm. Specific capacitance can be as high as 370 F·g^-1 at current density of1. 0 A·g^-1 in 6 mol·L^-1 KOH electrolyte. After 3 000 cycles,capacitance could still maintain 95. 2%.更多还原