| 中等比表面积高容量活性炭电极材料制备和表征 |
| |
| 引用本文： | 郑祥伟,胡中华,刘亚菲,高强,温祖标.中等比表面积高容量活性炭电极材料制备和表征[J].复旦学报(自然科学版),2009,48(1). |
| |
| 作者姓名： | 郑祥伟 胡中华 刘亚菲 高强 温祖标 |
| |
| 作者单位： | 同济大学化学系,上海,200092
|
| |
| 摘 要： | 以天然高分子椰壳为原料,采用ZnCl2,预活化和CO2/水蒸气活化的二次活化法制备活性炭.用氮气吸附和傅里叶红外表征活性炭材料的比表面积,孔结构以及表面化学性质.结果显示,所制备的活性炭比表面积和孔径可调,中孔率为16.3%～36.9%.经首步活化的中间炭具有丰富的微孔和表面官能团,并随着第二步活化时间的增加逐渐分解,同时伴随着炭烧失率增加,导致比表面积、孔容和孔径的增大.以制备的活性炭作为电极材料,6 mol·L-1 KOH电解液构成模拟电容器.采用恒流充放电、循环伏安、交流阻抗等方法研究了其电化学性能.结果显示,含氧官能团增加了活性炭表面的润湿性,并对比电容的增加有较大的贡献;而炭材料的比表面积增加对比电容有负面影响.中等比表面积968 m2·g-1样品的比电容达到278 F·g-1,面积比电容高达29μF·cm-2.
|
| 关 键 词： | 活性炭 二次活化 表面官能团 电极材料 电化学电容器 |
Preparation and Characterization of Activated Carbon Electrode Materials with High Capacitance and Medium Specific Surface Area |
| |
| ZHENG Xiang-wei,HU Zhong-hua,LIU Ya-fei,GAO Qiang,WEN Zu-biao.Preparation and Characterization of Activated Carbon Electrode Materials with High Capacitance and Medium Specific Surface Area[J].Journal of Fudan University(Natural Science),2009,48(1). |
| |
| Authors: | ZHENG Xiang-wei HU Zhong-hua LIU Ya-fei GAO Qiang WEN Zu-biao |
| |
| Institution: | Department of Chemistry;Tongji University;Shanghai 200092;China |
| |
| Abstract: | Natural polymer coconut shells were used as raw materials to prepare activated carbon with an improved two-step ZnCl2 and CO2/steam activation method.The specific surface area,porosity and surface property of the prepared samples were studied by the nitrogen adsorption and FT-IR spectroscopy.The results showed that the surface area and pore size of activated carbons could be tailored.The resultant carbons possessed the mesoporosity from 16.3% to 36.9%.The primary products of first step activation had abunda... |
| |
| Keywords: | activated carbon two-step activation surface functional group electrode material electrochemical capacitor |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
