Symmetric Supercapacitors Based on Multilayers of Conducting Polymers
Symmetric Supercapacitors Based on Multilayers of Conducting Polymers
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DOI：
10.1021/jp201108c
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发表时间：
2011-04-28
影响因子：
3.7
通讯作者：
Aleman, Carlos
中科院分区：
文献类型：
--
作者：
Aradilla, David;Estrany, Francesc;Aleman, Carlos
分析了基于不同导电聚合物交替层的多层体系的电化学性质、结构性质、充电电容和氧化还原循环稳定性。为了进行比较，还对单独的导电聚合物进行了平行研究。在所有情况下，多层体系的电容性能都好于单个导电聚合物，这归因于连续层之间界面的协同效应和多层材料较高的孔隙率。此外，经过数百次连续的氧化还原过程后，多层体系中的孔隙率保持相对较高，而在个别材料中孔隙率中等甚至为零，这一差异对于理解这些材料观察到的特定电容的非常不同的电化学退化至关重要。多层系统已经被用来制造I型配置的超级电容器(两个相同电极的对称组装)，已被发现具有非常高的比电容。
The electrochemical and structural properties, charge capacitance, and stability upon oxidation-reduction cycling of multilayered systems based on alternated layers of different conducting polymers have been analyzed. Parallel studies have been carried out on individual conducting polymers for comparison. In all cases, the capacitive properties of multilayered systems were better than those of individual conducting polymers, which have been attributed to both the synergistic effects at the interfaces between consecutive layers and the higher porosity of the multilayered materials. Moreover, after hundreds of consecutive oxidation-reduction processes, the porosity in multilayered systems remained relatively high, whereas it was moderate or even null in the individual materials, this difference being crucial to understanding the very different electrochemical degradation of the specific capacitance observed for these materials. Multilayered systems have been used to fabricate a supercapacitor in the type I configuration (symmetric assembly of two identical electrodes), which has been found to present a very high specific capacitance.