水热法合成掺杂氮多孔碳及其超级电容特性

摘要

分别以乙二胺、乙酰胺为氮源采用水热法合成掺氮多孔碳材料，利用 X 射线衍射、傅里叶红外光谱、扫描电子显微镜、比表面测试等对样品的结构、组成、形貌、比表面积进行了分析和表征，通过循环伏安、恒流充放电对样品的电化学性能进行了测试，探讨了不同氮源对多孔碳材料组成、表面形貌、孔径、比表面积以及电化学性能的影响。通过乙酰胺引入氮源的多孔碳材料表面微观形貌呈蜂窝状的多孔结构，孔的内部相连，比表面积为233．1 m2／g，孔径约5．1 nm。其孔结构丰富，孔尺寸分布单一。作为超级电容器的电极材料，经恒流充放电测试，比容量为188．7 F／g。%Nitrogen-doped porous carbon materials are synthesized by hydrothermal method,u-sing ethylenediamine,acetamide as the nitrogen source respectively.The structure,components, morphology and specific surface area of the as-produced samples are characterized by X-ray dif-fraction,Fourier transform infrared spectroscopy,scanning electron microscopy,nitrogen ad-sorption-desorption analysis and electrical conductivity measurements.The electrochemical per-formance of the samples is analyzed by the cyclic voltammetry and the charge-discharge tests. The effects of different nitrogen sources on the surface morphology,pore size,specific surface ar-ea and electrochemical performance of nitrogen-doped porous carbon materials are discussed.The surface morphology of the porous carbon material using acetamide as the nitrogen source is a structure with internally connected honeycomb holes.Specific surface area of this sample is 233.1 m2/g and its pore size is about 5.1 nm.As a super capacitor electrode material,this sample shows a specific capacity of 188.7 F/g by the constant current charge-discharge tests.