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Vacuum-Assisted Low-Temperature Synthesis of Reduced Graphene Oxide Thin-Film Electrodes for High-Performance Transparent and Flexible All-Solid-State Supercapacitors
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-12 00:00:00 , DOI: 10.1021/acsami.8b01938 Tolga Aytug 1 , Matthew S. Rager 1 , Wesley Higgins 1 , Forrest G. Brown 1 , Gabriel M. Veith 1 , Christopher M. Rouleau 2 , Hui Wang 1 , Zachary D. Hood 2 , Shannon M. Mahurin 1 , Richard T. Mayes 1 , Pooran C. Joshi 1 , Teja Kuruganti 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-12 00:00:00 , DOI: 10.1021/acsami.8b01938 Tolga Aytug 1 , Matthew S. Rager 1 , Wesley Higgins 1 , Forrest G. Brown 1 , Gabriel M. Veith 1 , Christopher M. Rouleau 2 , Hui Wang 1 , Zachary D. Hood 2 , Shannon M. Mahurin 1 , Richard T. Mayes 1 , Pooran C. Joshi 1 , Teja Kuruganti 1
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Simple and easily integrated design of flexible and transparent electrode materials affixed to polymer-based substrates hold great promise to have a revolutionary impact on the functionality and performance of energy storage devices for many future consumer electronics. Among these applications are touch sensors, roll-up displays, photovoltaic cells, health monitors, wireless sensors, and wearable communication devices. Here, we report an environmentally friendly, simple, and versatile approach to produce optically transparent and mechanically flexible all-solid-state supercapacitor devices. These supercapacitors were constructed on tin-doped indium oxide coated polyethylene terephthalate substrates by intercalation of a polymer-based gel electrolyte between two reduced graphene oxide (rGO) thin-film electrodes. The rGO electrodes were fabricated simply by drop-casting of graphene oxide (GO) films, followed by a novel low-temperature (≤250 °C) vacuum-assisted annealing approach for the in situ reduction of GO to rGO. A trade-off between the optical transparency and electrochemical performance is determined by the concentration of the GO in the initial dispersion, whereby the highest capacitance (∼650 μF cm–2) occurs at a relatively lower optical transmittance (24%). Notably, the all-solid-state supercapacitors demonstrated excellent mechanical flexibility with a capacity retention rate above 90% under various bending angles and cycles. These attributes underscore the potential of the present approach to provide a path toward the realization of thin-film-based supercapacitors as flexible and transparent energy storage devices for a variety of practical applications.
中文翻译：
真空辅助低温合成还原型氧化石墨烯薄膜电极，用于高性能透明，柔性全固态超级电容器
固定在聚合物基片上的柔性和透明电极材料的简单，易于集成的设计具有巨大的前景，有望对许多未来的消费电子产品的储能设备的功能和性能产生革命性的影响。这些应用包括触摸传感器，卷帘式显示器，光伏电池，健康监测器，无线传感器和可穿戴通信设备。在这里，我们报告了一种环保，简单且通用的方法来生产光学透明和机械灵活的全固态超级电容器设备。这些超级电容器是通过在两个还原的氧化石墨烯（rGO）薄膜电极之间插入基于聚合物的凝胶电解质，在掺锡氧化铟涂覆的聚对苯二甲酸乙二醇酯基板上构建的。通过氧化石墨烯（GO）膜的滴铸法，然后通过新颖的低温（≤250°C）真空辅助退火方法将GO原位还原为rGO，可以简单地制备rGO电极。光学透明度和电化学性能之间的权衡取决于初始分散液中GO的浓度，从而获得最高的电容（约650μFcm–2）以相对较低的光学透射率（24％）发生。值得注意的是，全固态超级电容器表现出出色的机械柔韧性，在各种弯曲角度和循环下，容量保持率均超过90％。这些属性强调了本方法的潜力，该方法为实现基于薄膜的超级电容器作为各种实际应用中的柔性和透明储能装置提供了一条途径。
更新日期：2018-03-12
中文翻译：
真空辅助低温合成还原型氧化石墨烯薄膜电极，用于高性能透明，柔性全固态超级电容器
固定在聚合物基片上的柔性和透明电极材料的简单，易于集成的设计具有巨大的前景，有望对许多未来的消费电子产品的储能设备的功能和性能产生革命性的影响。这些应用包括触摸传感器，卷帘式显示器，光伏电池，健康监测器，无线传感器和可穿戴通信设备。在这里，我们报告了一种环保，简单且通用的方法来生产光学透明和机械灵活的全固态超级电容器设备。这些超级电容器是通过在两个还原的氧化石墨烯（rGO）薄膜电极之间插入基于聚合物的凝胶电解质，在掺锡氧化铟涂覆的聚对苯二甲酸乙二醇酯基板上构建的。通过氧化石墨烯（GO）膜的滴铸法，然后通过新颖的低温（≤250°C）真空辅助退火方法将GO原位还原为rGO，可以简单地制备rGO电极。光学透明度和电化学性能之间的权衡取决于初始分散液中GO的浓度，从而获得最高的电容（约650μFcm–2）以相对较低的光学透射率（24％）发生。值得注意的是，全固态超级电容器表现出出色的机械柔韧性，在各种弯曲角度和循环下，容量保持率均超过90％。这些属性强调了本方法的潜力，该方法为实现基于薄膜的超级电容器作为各种实际应用中的柔性和透明储能装置提供了一条途径。
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