Performance of mesoporous carbons derived from poly(vinyl alcohol) in electrochemical capacitors
Performance of mesoporous carbons derived from poly(vinyl alcohol) in electrochemical capacitors
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DOI：
10.1016/j.jpowsour.2007.09.042
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发表时间：
2008-01
影响因子：
9.2
通讯作者：
J. A. Fernández;T. Morishita;M. Toyoda;M. Inagaki;F. Stoeckli;T. Centeno
中科院分区：
文献类型：
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作者：
J. A. Fernández;T. Morishita;M. Toyoda;M. Inagaki;F. Stoeckli;T. Centeno
目前的工作表明，通过碳化聚（乙烯醇）与柠檬酸镁的混合物得到的介孔材料是非常有前途的候选人在超级电容器电极。它们的高性能主要来自于通过总表面积范围的双层机制，并且在低电流密度（1 mA cm−2）下，在2 M H2SO4水溶液电解质中获得高达180 F g−1的值，在乙腈中的1 M（C2H5）4 NBF4中获得约100 F g−1的值。此外，在大多数情况下，比电容在100 mA cm−2时仅降低15%，而许多其他类型的碳则显示出更高的降低。
The present work shows that mesoporous materials obtained by the carbonization of mixtures of poly(vinyl alcohol) with magnesium citrate are very promising candidates for electrodes in supercapacitors. Their high performance arises essentially from a double-layer mechanism through the extent of the total surface area and one obtains at low current density (1 mA cm−2) values as high as 180 F g−1 in aqueous 2 M H2SO4 electrolyte and around 100 F g−1 in 1 M (C2H5)4 NBF4 in acetonitrile. Moreover, in most cases the specific capacitance is reduced only by 15% at 100 mA cm−2, as opposed to many other types of carbons which display much higher reductions.