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首页> 外文期刊>Journal of Materials Engineering and Performance >Tobacco Stem-Based Activated Carbons for High Performance Supercapacitors
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Tobacco Stem-Based Activated Carbons for High Performance Supercapacitors

机译：高性能超级电容器用烟草干基活性炭

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摘要

Tobacco stem-based activated carbons (TS-ACs) were prepared by simple KOH activation and their application as electrodes in the electrical double layer capacitor (EDLC) performed successfully. The BET surface area, pore volume, and pore size distribution of the TS-ACs were evaluated based on N_2 adsorption isotherms at 77 K. The surface area of the obtained activated carbons varies over a wide range (1472.8-3326.7 m~2/g) and the mesoporosity was enhanced significantly as the ratio of KOH to tobacco stem (TS) increased. The electrochemical behaviors of series TS-ACs were characterized by means of galvanostatic charging/discharging, cyclic voltammetry, and impedance spectroscopy. The correlation between electrochemical properties and pore structure was investigated. A high specific capacitance value as 190 F/g at 1 mA/cm~2 was obtained in 1 M LiPF_6-EC/DMC/DEC electrolyte solution. Furthermore, good performance is also achieved even at high current densities. A development of new use for TS into a valuable energy storage material is explored.
机译：通过简单的KOH活化制备了基于烟梗的活性炭（TS-AC），并成功地将其用作双电层电容器（EDLC）中的电极。基于77 K的N_2吸附等温线评价TS-ACs的BET表面积，孔体积和孔径分布。获得的活性炭表面积在较大范围（1472.8-3326.7 m〜2 / g）之间变化。 ），并且随着KOH与烟梗（TS）比例的增加，中孔性显着增强。 TS-AC系列的电化学行为通过恒电流充电/放电，循环伏安法和阻抗谱进行表征。研究了电化学性质与孔结构之间的关系。在1 M LiPF_6-EC / DMC / DEC电解质溶液中，在1 mA / cm〜2时获得了190 F / g的高比电容值。此外，即使在高电流密度下也可以获得良好的性能。探索将TS的新用途开发成有价值的储能材料。

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