MOF基多孔炭的制备及其在超级电容器中的应用

金属有机框架材料(MOFs)由于其具有较高的比表面积,可调节的孔隙结构,以及结构、功能多样性,使其作为前驱体在电化学等方面具有广阔的应用前景.采用水热法合成了金属有机框架材料Zn₃(bpdc)₃(bpy)]·2DMF·4H₂O](ZBB),并以此为前驱体,通过炭化-活化法制备了多孔炭ZBBC-T-A,研究了不同炭化温度,不同的炭碱比对多孔炭微观结构及电化学性能的影响.结果表明:多孔炭ZBBC-800-1∶3是以微、介孔为主,且最大比表面积达2 294.6 m² ·g^-1;以6 mol·L^-1 KOH为电解液,在电流密度为1 A·g^-1时,其比电容为304.8 F·g^-1;电流密度从1 A·g^-1增加到10 A·g^-1时,电容损失率为21.26%;在1 A·g^-1的电流密度下,经过5 000次循环后,电容保持率为95.85%.其能量密度为8.06 Wh·kg^-1.

Preparation of MOF based porous carbon and its application in supercapacitor

Metal-organic framework materials (MOFs) have broad application prospects as precursors in electrochemical fields due to their high specific surface area, pore structure, and structural and functional diversity. In this paper, the metal-organic framework material Zn₃(bpdc)₃(bpy)]·2DMF·4H₂O](ZBB) was synthesized by hydrothermal method, the porous carbon ZBBC-T-A was prepared by carbonization and activation method. The effects of different carbonization temperatures and different carbon base ratios on the microstructure and electrochemical properties of porous carbon were studied. The results showed that the porous carbon ZBBC-800-1∶3 is mainly microporous and mesoporous, and the maximum specific surface area is 2 294.6 m² ·g^-1. Using 6 mol·L^-1 KOH as electrolyte, the specific capacitance is 304.8 F·g^-1 the current density 1 A·g^-1. When the current density increases from1 A·g^-1 to 10 A·g^-1,the capacitance loss rate is 21.26%. At the current density of 1 A·g^-1, the capacitance retention is 95.85% after 5 000 cycles calculated energy density is 8.06 Wh·kg^-1.