MOFs基氮自掺杂多孔炭的可控制备及其电化学性能

为开发高性能超级电容器电极材料，以溶剂热法合成无色金属有机框架化合物（MOFs）材料［Zn2（C8H4O4）2（C6H12N2）］·4 DMF·0.5 H2O（简称ZDP）作为炭前驱体，采用一步碳化法制备无定型结构氮自掺杂多孔炭 （ZDPC-750），并使用X射线衍射分析、拉曼光谱分析、扫描电子显微镜、透射电子显微镜、氮气吸附、X 射线光电子能谱对ZDPC-750试样进行表征；选用浓度为6 mol/ L的KOH溶液为电解液，通过恒电流充放电（GCD）、循环伏安（CV）、电化学阻抗谱（ EIS ）等方法测定ZDPC-750电极试样的电化学性能。结果表明: ZDPC-750呈包含微孔、介孔和大孔的分级结构，比表面积（BET法）高达1 228 m2/g，平均孔径为3.53 nm；当电流密度为1.0 A/g时，ZDPC-750电极的比电容高达175 F/g；当电流密度从1.0 A/g 增加到10.0 A/g 时，电容保持率为80.4%；即使在1 A/g下GCD循环5 000次，电容保持率仍然高达94.74%。

Controllable preparation and electrochemical performance of MOFs-based nitrogen self-doped porous carbon

In order to develop high-performance supercapacitor electrode materials， the colorless metal organic framework compounds（MOFs） material［Zn2（C8H4O4）2（C6H12N2）］·4DMF·0.5H2O （referred to as ZDP） was synthesized by the solvothermal method as carbon precursor， and the one-step carbonization method was adopted to prepare the amorphous nitrogen self-doped porous carbon ZDPC-750. Then the ZDPC-750 samples were characterized by X-ray diffraction analysis， Raman spectroscopy， scanning electron microscopy， transmission electron microscopy， nitrogen adsorption， and X-ray photoelectron spectroscopy. And the electrochemical properties of ZDPC-750 electrode samples were determined by galvanostatic charge-discharge（GCD）， cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS） methods with the concentration of 6 mol/L KOH solution as electrolyte. The results showed that the ZDPC-750 had a hierarchical structure including micropores， mesopores and macropores， and its BET specific surface area was up to 1 228 m2/g， and the average pore size was 3.53 nm. Moreover， when the current density was 1.0 A/g， the specific capacitance of the ZDPC-750 electrode sample was up to 175 F/g. When the current density increased from 1.0 A/g to 10.0 A/g， its capacitance retention rate was 80.4%. Even if GCD was cycled 5 000 times at 1 A/g，its capacitance retention rate was still as high as 94.74%.