A comparative study on electrochemical co-deposition and capacitance of composite films of conducting polymers and carbon nanotubes
A comparative study on electrochemical co-deposition and capacitance of composite films of conducting polymers and carbon nanotubes
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DOI：
10.1016/j.electacta.2007.07.004
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发表时间：
2007-12-01
影响因子：
6.6
通讯作者：
Chen, George Z.
中科院分区：
文献类型：
--
作者：
Peng, Chuang;Jin, Jun;Chen, George Z.
采用电化学共沉积法，以酸处理后的碳纳米管（CNTs）和相应的单体为原料，分别与聚苯胺（PANI）、聚吡咯（PPY）和聚[3，4-乙撑二氧噻吩]（PEDOT）制备了CNTs/PANI/PPY/PEDOT复合膜。在PPY和PEDOT的情况下，CNT在电沉积期间充当电荷载体，并且还充当三维微米和纳米多孔结构的骨架和聚合物内的有效电荷平衡掺杂剂。所有的复合材料表现出改善的机械完整性，更高的电子和离子导电性（即使当聚合物被还原），并表现出更大的电极比电容比单独的聚合物。在相同条件下，PPY-CNT和PEDOT-CNT薄膜的电容值均得到了显著提高。然而，新鲜的PANI-CNT膜在电化学上与PANI相似，但PPY-CNT和PEDOT-CNT与单独的相应聚合物明显不同。在连续电位循环测试中，与纯聚合物和其他复合膜相比，PANI-CNT复合膜的电容保持性能更好，并分析了可能的原因。(c)2007爱思唯尔有限公司版权所有。
Composite films of carbon nanotubes (CNTs) with polyaniline (PANI), polypyrrole (PPY) or poly [3,4-ethylenedioxythiophene] (PEDOT) were prepared via electrochemical co-deposition from solutions containing acid treated CNTs and the corresponding monomer. In the cases of PPY and PEDOT, CNTs served as the charge carriers during electro-deposition, and also acted as both the backbone of a three-dimensional micro- and nano-porous structure and the effective charge-balancing dopant within the polymer. All the composites showed improved mechanical integrity, higher electronic and ionic conductivity (even when the polymer was reduced), and exhibited larger electrode specific capacitance than the polymer alone. Under similar conditions, the capacitance was enhanced significantly in as-prepared PPY-CNT and PEDOT-CNT films. However, the fresh PANI-CNT film was electrochemically similar to PANI, but PPY-CNT and PEDOT-CNT differed noticeably from the respective polymers alone. In continuous potential cycling tests, unlike the pure polymer and other composite films, PANI-CNT performed much better in retaining the capacitance of the as-prepared film, and the possible cause is analysed. (c) 2007 Elsevier Ltd. All rights reserved.