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Electro-polymerisation of 3,4-ethylenedioxythiophene on reticulated vitreous carbon in imidazolium-based chloroaluminate ionic liquid as energy storage material
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2018-02-27 , DOI: 10.1016/j.elecom.2018.02.018
T. Schoetz , C. Ponce de Leon , A. Bund , M. Ueda

This work shows the electro-polymerisation of thin film poly(3,4-ethylenedioxythiophene) on three-dimensional reticulated vitreous carbon substrates by cyclic voltammetry and pulsed polymerisation methods from a Lewis neutral chloroaluminate ionic liquid containing 3,4-ethylenedioxythiophene monomer. The polymer composite is attractive as an energy storage electrode for sustainable and high-performance technologies due to its unique properties of battery and capacitor in one system, i.e., the redox reaction occurring simultaneously with the anion doping/de-doping of the conductive polymer with AlCl4 ionic species contained in the ionic liquid. The structure of the polymer films, their doping/de-doping mechanism and the stability in the ionic liquid were characterised by scanning electron microscopy and cyclic voltammetry and compared with films electro-polymerised on planar vitreous carbon. The typical granular and nano/micro-porous polymer structure observed on planar vitreous carbon was successfully replicated on the macro-porous reticulated vitreous carbon surface. The polymer films show approximately 45% higher capacity than films on planar substrates and similar efficient redox behaviour, proving that the material has hybrid battery-capacitor properties enhanced by the higher area per unit volume of reticulated vitreous carbon.



中文翻译:

3,4-乙撑二氧噻吩在网状玻璃状碳上在作为能量存储材料的咪唑基氯铝酸盐离子液体中的电聚合

这项工作显示了通过循环伏安法和脉冲聚合方法,从含有3,4-乙撑二氧噻吩单体的Lewis中性氯铝酸盐离子液体中,在三维网状玻璃碳基质上进行薄膜聚(3,4-乙撑二氧噻吩)的电聚合。聚合物复合材料由于其在一个系统中具有电池和电容器的独特性能,因此可作为可持续和高性能技术的储能电极,氧化还原反应与导电聚合物的阴离子掺杂/去掺杂同时发生。氯化铝4 -离子液体中包含的离子物质。通过扫描电子显微镜和循环伏安法表征了聚合物薄膜的结构,掺杂/去掺杂机理以及在离子液体中的稳定性,并与在平面玻璃碳上电聚合的薄膜进行了比较。在平面玻璃碳上观察到的典型的颗粒状和纳米/微孔聚合物结构已成功复制到大孔网状玻璃碳表面上。聚合物薄膜的显示容量比平面基板上的薄膜高约45%,并且具有类似的有效氧化还原性能,证明该材料具有混合的电池-电容器特性,因为单位体积的网状玻璃状碳具有更高的面积。

更新日期:2018-02-27
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