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High Performance Symmetric Supercapacitor Based on Sunflower Marrow Carbon Electrode Material

机译:基于葵花碳电极材料的高性能对称超级电容器

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In this study, sunflower marrow is used as raw material to prepare porous carbon via a simple carbonization method activated by ZnCl2 and FeCl3 mixture. The as-prepared porous sunflower marrow carbons (PSMCs) show large number of mesoporous and masoporous, maximum specific surface area of 1628.5 m2 g-1 and large pore volume of 2.34 cm3 g-1. As an electrode material for supercapacitor, the PSMCs possess high specific capacitance of 252.5 F g-1 at 0.5 A g-1. A symmetric supercapacitor used PSMCs as electrodes exhibits energies density of 12.4 Wh kg-1 at a power density -1 -1 of 817 W kg operated in the voltage range of 0-2.0 V in 0.5 mol L Na2SO4 aqueous electrolyte. Also, the carbon material shows excellent cycleability retains about 97% initial capacitance after 5000 cycles.
机译:在这项研究中,以向日葵骨髓为原料,通过ZnCl2和FeCl3混合物活化的简单碳化方法制备多孔碳。制备的多孔向日葵骨髓碳(PSMC)显示出大量的中孔和中孔,最大比表面积为1628.5 m2 g-1,大孔体积为2.34 cm3 g-1。作为超级电容器的电极材料,PSMC在0.5 A g-1时具有252.5 F g-1的高比电容。使用PSMC作为电极的对称超级电容器在0.5 mol L Na2SO4水溶液中在0-2.0 V的电压范围内工作时,在817 W kg的功率密度-1 -1下显示出12.4 Wh kg-1的能量密度。同样,碳材料显示出优异的循环能力,在5000次循环后仍保留约97%的初始电容。

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