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Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly ( N , N -methylenebisacrylamide) hydrogel modified with Nafion 117 ®
Materials for Renewable and Sustainable Energy ( IF 3.6 ) Pub Date : 2018-10-22 , DOI: 10.1007/s40243-018-0137-5
Mariusz Radtke , Anna Ignaszak

Abstract

In this study, we optimized the dispersion of hydrophobic carbons within ionically conductive hydrogels composed of a poly (acrylamide)-pAAm/poly (N,N-methylenebisacrylamide)-pMBAA modified with Nafion 117®. The carbon-embedded hydrogel films were prepared by in situ UV polymerization of aqueous suspension containing KCl, acrylamide and N,N-methylenebisacrylamide monomers, the multi-walled-carbon nanotubes, graphene, single-walled carbon nanohorns, and their composites with polypyrrole. These electrodes were translucent, stretchable, ionically and electronically conductive at low carbon content. In addition, they were very flexible, reaching a stretch up to 1475.57% of their initial length. Mechanical characteristics and conductivity were measured at their maximum hydration, corresponding to water uptake of 47.20% after 5 days of curing in humidity chamber. Hydrogels with dispersed carbon demonstrated both ionic and electronic conductivity in hydrated state and electronic conductivity alone when the electrode was dry. Nafion 117® acted as a surfactant and played a significant role in the improvement of carbon distribution within the hydrogel due to the hydrophobic–hydrophilic interaction between hydrogel, Nafion and the carbon. This was further correlated with changes in zeta potential at the carbon–hydrogel interface upon addition of Nafion, measured using a rotating disk electrode voltammetry.

Graphical abstract



中文翻译:

基于碳的可拉伸集流器,该集流器嵌入在用Nafion 117®改性的聚(丙烯酰胺)/聚(N,N-亚甲基双丙烯酰胺)水凝胶中

摘要

在这项研究中,我们进行了优化的聚(丙烯酰胺)构成的离子导电水凝胶-pAAm /聚(内疏水性碳的分散ÑÑ用的Nafion 117改性甲基双丙烯酰胺)-pMBAA ®。含碳的水凝胶薄膜是通过含有KCl,丙烯酰胺和NN的水悬浮液的原位UV聚合制备的-亚甲基双丙烯酰胺单体,多壁碳纳米管,石墨烯,单壁碳纳米角及其与聚吡咯的复合物。这些电极在低碳含量下是半透明的,可拉伸的,离子导电的和电子导电的。此外,它们非常灵活,可以拉伸到其初始长度的1475.57%。在最大水合作用下测量机械特性和电导率,相当于在湿度箱中固化5天后吸水量为47.20%。当电极干燥时,具有分散碳的水凝胶既显示出水合态的离子导电性,也显示出电子导电性。的Nafion 117 ®充当表面活性剂,由于水凝胶,Nafion和碳之间的疏水-亲水相互作用,在改善水凝胶中碳的分布方面起着重要作用。这进一步与添加Nafion后碳-水凝胶界面处的Zeta电位变化相关,该变化使用旋转盘电极伏安法测量。

图形概要

更新日期:2018-10-22
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