Application of attapulgite/maltose system on mesoporous carbon material preparation for electrochemical capacitors
Application of attapulgite/maltose system on mesoporous carbon material preparation for electrochemical capacitors
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DOI：
10.1007/s10800-014-0688-9
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
Xia Zhao;Heming Luo;K. Du;Feng-Bo Zhang;Ya-Bing Li
中科院分区：
文献类型：
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作者：
Xia Zhao;Heming Luo;K. Du;Feng-Bo Zhang;Ya-Bing Li
以麦芽糖为碳源，以高岭土为硬模板剂，采用常压浸渍法在室温下制备了介孔炭材料。采用N2吸附-脱附、X射线衍射和透射电子显微镜对材料的结构和形貌进行了表征。结果表明，所制备的碳材料具有链状层状结构，其表面充满了大量的纳米级孔洞。材料还显示出部分纤维束，比表面积和总孔体积分别为628.6 m2 g-1和1.31 cm 3g-1。通过恒流充放电、循环伏安、交流阻抗等测试方法对材料的电化学性能进行了评价。恒流充放电测试表明，该材料具有良好的储能性能。当电流密度为600 mA g-1时，比电容值达到171 F g-1。该材料在高扫描速率（200 mV s-1）下也表现出典型循环伏安曲线的准矩形特征，表明它们具有优异的倍率容量。交流阻抗测试结果表明，该材料为典型的多孔电极材料，其结合电阻为0.82 Ω。材料的比电容在1,000次恒流充/放电循环后达到79%，表明它们具有上级循环稳定性。
Mesoporous carbon materials were prepared through atmospheric pressure impregnation at room temperature using attapulgite as hard template and maltose as carbon source. N2absorption–desorption, X-ray diffraction, and transmission electron microscopy were used to determine the construction and morphology of the materials. The results showed that the prepared carbon materials possessed chain-layered structures whose surfaces were filled with ample nanoscale apertures. The materials also exhibited partial fasciculus with specific surface area and total pore volume of 628.6 m2g−1and 1.31 cm3g−1, respectively. Constant current charge/discharge, cyclic voltammetry, and AC impedance tests were performed to evaluate the electrochemical performance of the materials. The constant current charge/discharge tests showed that the materials have excellent energy storage capacity. When the current density was 600 mA g−1, the specific capacitance value reached 171 F g−1. The materials showed quasi-rectangular features of typical cyclic voltammetry curve even at high scan rate (200 mV s−1), indicating that they possess excellent rate capacity. The AC impedance tests showed that the materials were typical porous electrode materials with combination resistance of 0.82 Ω. The specific capacitance of the materials reached 79 % after 1,000 constant current charge/discharge cycles, indicating that they have superior cyclic stability.