A structural influence on the electrical double-layer characteristics of Al4C3-derived carbon
A structural influence on the electrical double-layer characteristics of Al4C3-derived carbon
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DOI：
10.1007/s10008-008-0659-3
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发表时间：
2010-04
影响因子：
2.5
通讯作者：
Marko Lätt;M. Käärik;L. Permann;H. Kuura;M. Arulepp;J. Leis
中科院分区：
文献类型：
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作者：
Marko Lätt;M. Käärik;L. Permann;H. Kuura;M. Arulepp;J. Leis
利用碳化铝与氯气在不同温度（400 ~ 900℃）下反应制备了几种碳材料。氯化温度与孔隙度呈负相关，石墨化程度随氯化温度的升高而升高。在1.0 m et3menbf4电解质的三电极测试电池中进行的电化学测量表明，孔隙率参数和石墨化程度的变化与比电容值具有良好的相关性。电容取决于碳的结构，在氯化作用范围内，负电荷和正电荷电极材料的电容量分别为109 ~ 60 F g−1和114 ~ 64 F g−1。在700°C下生产的材料中观察到异常低的电容，这是由多壁碳纳米桶和高度有序的弯曲石墨片解释的，它们具有低比表面和相对较低的比表面相关电容。
Several carbon materials were produced by reacting aluminum carbide with chlorine gas at different temperatures (400–900 °C). Chlorination temperature and porosity values showed the inversely related trends whereby the graphitization degree rises with the chlorination temperature. Electrochemical measurements performed in three-electrode test cells with 1.0-M Et3MeNBF4electrolyte revealed that the changes in porosity parameters and the degree of graphitization are in good correlation with specific capacitance values. Capacitance depends on the structure of carbon and varies in studied chlorination range from 109 to 60 F g−1and from 114 to 64 F g−1for the negatively and positively charged electrode materials, respectively. An exceptionally low capacitance was observed for the material produced at 700 °C that was explained by the multiwall carbon nanobarrels and the highly ordered curved graphitic flakes, which have low specific surface and possess the relatively low specific surface-related capacitance.