Self-Assembled N/S Codoped Flexible Graphene Paper for High Performance Energy Storage and Oxygen Reduction Reaction
Self-Assembled N/S Codoped Flexible Graphene Paper for High Performance Energy Storage and Oxygen Reduction Reaction
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DOI：
10.1021/acsami.5b10545
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发表时间：
2016-01-27
影响因子：
9.5
通讯作者：
Dou, Shi Xue
中科院分区：
文献类型：
--
作者：
Akhter, Taslima;Islam, Md. Monirul;Dou, Shi Xue
氮和硫共掺杂的石墨烯的新型柔性三维（3D）结构已经通过液晶氧化石墨烯掺杂剂组合物的热处理，随后通过软自组装方法成功合成。高温工艺将逐层组装体转变成具有不同石墨烯原子构型的高表面积宏观和纳米多孔自支撑材料。互连的3D网络表现出305 F g（-1）的优异充电电容性能。（100 mV s（-1）），前所未有的188 F cm（-3）体积电容（在1A g（-1）下），和28.44Wh kg（-1）的出色能量密度以及10000次循环的循环寿命作为用于水性电解质的自支撑电极，对称超级电容器装置。此外，所得氮/硫掺杂的石墨烯结构在用作氧还原反应的无金属催化剂时显示出良好的电催化性能、长的耐久性和高选择性。这项研究展示了一种有效的方法，用于开发一系列用于现代能源存储和能源应用的杂原子掺杂石墨烯框架的多功能和灵活的3D架构。
A novel flexible three-dimensional (3D) architecture of nitrogen and sulfur codoped graphene has been successfully synthesized via thermal treatment of a liquid crystalline graphene oxide -doping agent composition, followed by a soft self -assembly approach. The high temperature process turns the layer -by -layer assembly into a high surface area macro- and nanoporous free-standing material with different atomic configurations of graphene. The interconnected 3D network exhibits excellent charge capacitive performance of 305 F g(-1) (at 100 mV s(-1)), an unprecedented volumetric capacitance of 188 F cm(-3) (at 1 A g(-1)), and outstanding energy density of 28.44 Wh kg(-1) as well as cycle life of 10 000 cycles as a free-standing electrode for an aqueous electrolyte, symmetric supercapacitor device. Moreover, the resulting nitrogen/sulfur doped graphene architecture shows good electrocatalytic performance, long durability, and high selectivity when they are used as metal -free catalyst for the oxygen reduction reaction. This study demonstrates an efficient approach for the development of multifunctional as well as flexible 3D architectures for a series of heteroatom-doped graphene frameworks for modern energy storage as well as energy source applications.