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Development of a 3D graphene aerogel and 3D porous graphene/MnO2@polyaniline hybrid film for all-solid-state flexible asymmetric supercapacitors†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1039/c7se00433h Kalyan Ghosh 1, 2, 3 , Chee Yoon Yue 1, 2, 3 , Md Moniruzzaman Sk 2, 3, 4 , Rajeeb Kumar Jena 1, 2, 3 , Shuguang Bi 1, 2, 3
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1039/c7se00433h Kalyan Ghosh 1, 2, 3 , Chee Yoon Yue 1, 2, 3 , Md Moniruzzaman Sk 2, 3, 4 , Rajeeb Kumar Jena 1, 2, 3 , Shuguang Bi 1, 2, 3
Affiliation
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There is an increasing demand for safe, environmentally benign energy storage devices in portable electronic appliances, wearable gadgets, flexible displays, and other personal multimedia devices. In this study, we have fabricated an all-solid-state flexible asymmetric supercapacitor using a novel 3D porous reduced graphene oxide/manganese dioxide@polyaniline (RGO/MnO2@PANI) hybrid film as the positive electrode and a self-assembled 3D pillared graphene aerogel as the negative electrode material with a polyvinyl alcohol/potassium hydroxide (PVA/KOH) gel electrolyte. The flexible composite film was synthesized by vacuum filtration of GO and a MnO2@PANI mixture followed by chemical reduction of the resulting film in a hydrothermal autoclave. The 3D graphene aerogel was synthesized by a hydrothermal route using a solution of the nonionic triblock copolymer Pluronic F-68 as a soft template and vitamin C as a reducing agent. Herein, the Pluronic copolymer played dual roles: first, it enabled the effective dispersion of graphene oxide in water, and second, it assisted the formation of a stable 3D pillared hydrogel assembly. The RGO/MnO2@PANI-based symmetric supercapacitor shows a high energy density of 18.33 W h kg−1 at a power density of 0.388 kW kg−1. An asymmetric supercapacitor (graphene aerogel//RGO/MnO2@PANI), which was fabricated by optimizing the individual electrode materials, exhibited a very high energy density of 38.12 W h kg−1 at a power density of 1.191 kW kg−1 utilizing a large potential window of 1.5 V. Moreover, 3 cells connected in series successfully lit up a red LED for 45 s and displayed similar performance under bending conditions.
中文翻译：
开发用于全固态柔性不对称超级电容器的3D石墨烯气凝胶和3D多孔石墨烯/ MnO 2 @聚苯胺杂化膜†
在便携式电子设备，可穿戴设备，柔性显示器和其他个人多媒体设备中，对安全，环保的能量存储设备的需求不断增长。在这项研究中，我们使用新型3D多孔还原氧化石墨烯/二氧化锰@聚苯胺（RGO / MnO 2 @PANI）杂化膜作为正极并自组装的3D柱状结构制造了全固态柔性不对称超级电容器石墨烯气凝胶作为负极材料，并带有聚乙烯醇/氢氧化钾（PVA / KOH）凝胶电解质。通过GO和MnO 2的真空过滤合成了柔性复合膜@PANI混合物，然后在水热高压釜中化学还原所得膜。通过使用非离子三嵌段共聚物Pluronic F-68作为软模板和维生素C作为还原剂的溶液通过水热法合成3D石墨烯气凝胶。在此，Pluronic共聚物起着双重作用：首先，它可以使氧化石墨烯有效地分散在水中，其次，它有助于形成稳定的3D柱状水凝胶组件。基于RGO / MnO 2 @PANI的对称超级电容器在功率密度为0.388 kW kg -1时显示出18.33 W h kg -1的高能量密度。不对称超级电容器（石墨烯气凝胶// RGO / MnO 2通过优化单个电极材料而制造的@PANI）在1.191 kW kg -1的功率密度下利用1.5 V的大电势窗口显示出38.12 W h kg -1的非常高的能量密度。此外，还有3个电池串联连接成功点亮了红色LED 45秒钟，并且在弯曲条件下表现出相似的性能。
更新日期：2017-11-20
中文翻译：
开发用于全固态柔性不对称超级电容器的3D石墨烯气凝胶和3D多孔石墨烯/ MnO 2 @聚苯胺杂化膜†
在便携式电子设备，可穿戴设备，柔性显示器和其他个人多媒体设备中，对安全，环保的能量存储设备的需求不断增长。在这项研究中，我们使用新型3D多孔还原氧化石墨烯/二氧化锰@聚苯胺（RGO / MnO 2 @PANI）杂化膜作为正极并自组装的3D柱状结构制造了全固态柔性不对称超级电容器石墨烯气凝胶作为负极材料，并带有聚乙烯醇/氢氧化钾（PVA / KOH）凝胶电解质。通过GO和MnO 2的真空过滤合成了柔性复合膜@PANI混合物，然后在水热高压釜中化学还原所得膜。通过使用非离子三嵌段共聚物Pluronic F-68作为软模板和维生素C作为还原剂的溶液通过水热法合成3D石墨烯气凝胶。在此，Pluronic共聚物起着双重作用：首先，它可以使氧化石墨烯有效地分散在水中，其次，它有助于形成稳定的3D柱状水凝胶组件。基于RGO / MnO 2 @PANI的对称超级电容器在功率密度为0.388 kW kg -1时显示出18.33 W h kg -1的高能量密度。不对称超级电容器（石墨烯气凝胶// RGO / MnO 2通过优化单个电极材料而制造的@PANI）在1.191 kW kg -1的功率密度下利用1.5 V的大电势窗口显示出38.12 W h kg -1的非常高的能量密度。此外，还有3个电池串联连接成功点亮了红色LED 45秒钟，并且在弯曲条件下表现出相似的性能。
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