Co-deposition of conducting polymers in a room temperature ionic liquid
Co-deposition of conducting polymers in a room temperature ionic liquid
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DOI：
10.1039/b905156b
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发表时间：
2009-06
影响因子：
--
通讯作者：
Graeme A. Snook;A. Best
中科院分区：
文献类型：
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作者：
Graeme A. Snook;A. Best
本工作的重点是两种不同的导电聚合物在室温离子液体中的共沉积。研究了聚吡咯（PPy）和聚（3，4-乙撑二氧噻吩）（PEDOT）在1-丁基-甲基吡咯烷双（三氟甲磺酰基）酰亚胺（C4 mpyr TFSI）中的复合。在过去，已证明从离子液体沉积均聚物是困难的，所得层表现出充电和放电反应的不良动力学。使用离子液体中的混合单体溶液作为沉积介质，将两种聚合物组合为一层，产生上级聚合物层。聚（吡咯）的期望性能是高比电容和良好的机械性能，而聚（噻吩）衍生物的期望性能是高电导率、良好的机械性能和高孔隙率。使用循环伏安法、电容测量、电化学阻抗谱（EIS）和扫描电子显微镜（SEM）成像对共沉积的聚合物层进行表征。发现共沉积膜表现出改善的形态和更高的离子传输，同时保持与均聚物PPy相似的比电容。
This work focuses on the co-deposition of two different conducting polymers in a room temperature ionic liquid. The combination of poly(pyrrole) (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) is investigated in 1-butyl-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (C4mpyr TFSI). In the past, the deposition of the homopolymers from ionic liquids has proven difficult with the resultant layers exhibiting poor kinetics of both the charge and discharge reactions. Combining the two polymers as one layer, using a mixed monomer solution in an ionic liquid as the deposition media, creates a superior polymer layer. Desirable properties of the poly(pyrrole) are high specific capacitance and good mechanical properties while the desirable properties of the poly(thiophene) derivative are high electrical conductivity, good mechanical properties and high porosity. Characterisation of the co-deposited polymer layers is carried out using cyclic voltammetry, capacitance measurements, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) imaging. The co-deposited film is found to exhibit an improved morphology and higher ionic transport, while maintaining a similar specific capacitance to the homo-polymer PPy.