Kalpana D, Lee Y S
J Nanosci Nanotechnol. 2016 Mar;16(3):2950-5. doi: 10.1166/jnn.2016.12464.
Activated carbon was synthesized from peanut shells by treating with H3PO4 with an intention to enhance the surface area and to find its electrochemical performance in EDLC as electrode material. The powdered peanut shells were pyrolyzed at three different temperatures namely 300 degrees C, 600 degrees C and 800 degrees C respectively. The structural and surface properties of the pyrolyzed carbon materials were studied using N2 adsorption/desorption, Raman, TEM and SEM analysis. There has been remarkable increase in the surface area of the carbon pyrolyzed at 600 degrees C due to the effect of pore generations. The surface area of the 600 degrees C pyrolyzed sample was found to be 1629 m2/g. The electrochemical properties of all the samples were evaluated by cyclic voltammetry, impedance spectroscopy, and galvanostatic charge-discharge tests. The system showed excellent cycleability and a maximum specific capacitance of 291 Fg(-1) was obtained in a 0.1 M H2SO4 electrolyte solution. The effects of the various properties of the activated carbon on the EDLC performance are discussed.
通过用磷酸处理花生壳来合成活性炭，目的是增加其表面积并研究其作为电极材料在双电层电容器中的电化学性能。将花生壳粉末分别在300℃、600℃和800℃这三个不同温度下进行热解。使用氮气吸附/脱附、拉曼光谱、透射电子显微镜和扫描电子显微镜分析来研究热解碳材料的结构和表面性质。由于孔隙生成的作用，在600℃下热解的碳的表面积有显著增加。发现600℃热解样品的表面积为1629 m2/g。通过循环伏安法、阻抗谱和恒电流充放电测试对所有样品的电化学性能进行了评估。该系统显示出优异的循环稳定性，并且在0.1 M硫酸电解质溶液中获得了291 Fg(-1)的最大比电容。讨论了活性炭的各种性质对双电层电容器性能的影响。
