【摘要】 以柠檬酸镁/沥青混合物为前驱体,通过模板炭化法制备介孔炭材料。通过调节柠檬酸镁与沥青的比例制备出不同孔径结构的炭材料,并以其作为电极材料,以1.7 mol/L 1-乙基-3-甲基咪唑双三氟甲磺酰亚胺盐/碳酸丙烯酯(Emim-TFSI/PC)电解液组装双电层电容器。通过循环伏安、恒流充放电、交流阻抗测试其在不同电压下的电化学性能。实验表明,柠檬酸镁/沥青比例为6:4时,制备出的介孔炭材料的电化学性能表现优异,扫描电压区间为0～3.5 V时,仍表现为良好的双电层电容性能,充放电电压为3.2 V时,质量比电容达100 F/g。更多还原

【Abstract】 The mesoporous carbon material was prepared by a template carbonization method using magnesium citrate/asphalt mixture as precursor.The carbon materials with different pore size structure were prepared by adjusting the ratio of magnesium citrate to asphalt.The electric double layer capacitor was assembled by using 1.7 mol/L 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/propylene carbonate(Emim-TFSI/PC) electrolyte and prepared electrode material.The electrochemical performance of the electric double layer capacitor was tested by galvanostatic charge/discharge,cyclic voltammetry and AC impedance comprehensive analysis under different voltages.It’ s shown that when the ratio of magnesium citrate to asphalt is 6:4,the prepared mesoporous carbon material has excellent electrochemical performance.When the scanning voltage range is 0-3.5 V,it still shows good electric double layer capacitance performance,and the mass specific capacitance is 100 F/g at 3.2 V.更多还原