Preparation of 3D Reduced Graphene Oxide/MnO2 Nanocomposites through a Vacuum-Impregnation Method and Their Electrochemical Capacitive Behavior
Preparation of 3D Reduced Graphene Oxide/MnO2 Nanocomposites through a Vacuum-Impregnation Method and Their Electrochemical Capacitive Behavior
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真空浸渍法制备3D还原氧化石墨烯/MnO2纳米复合材料及其电化学电容行为
DOI：
10.1002/celc.201600836
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发表时间：
2017
期刊：
影响因子：
4
通讯作者：
Zhao Shixu
中科院分区：
文献类型：
--
作者：
Zhong Jie;Yi Fenyun;Gao Aimei;Shu Dong;Huang Yulan;Li Zhibo;Zhu Weilie;He Chun;Meng Tao;Zhao Shixu
本文采用微波-水热法制备了三维多孔还原氧化石墨烯（rGO），并通过真空浸渍法将MnO 2原位引入到rGO的孔中，制备了3D-rGO/MnO 2纳米复合材料。 SEM图像显示了3D-rGO/MnO 2的蜂窝结构，并且MnO 2紧密地锚定在3D-rGO的表面上并进入孔中。3D-rGO/MnO 2纳米复合电极表现出优异的电化学电容行为，这是由于高电导率的多孔3D-rGO和高理论电容的MnO 2之间的协同效应。3D-rGO/MnO 2 - 5样品的最佳MnO 2含量为（53.1%），具有最高的比电容（278.5 F g− 1 at 1 A g−1）和良好的倍率性能。 该样品还具有显著的循环稳定性（10000次循环后93.5%的电容保持率）。3D-rGO/MnO 2纳米复合材料可被视为超级电容器电极材料的潜在候选者。
In this work, three‐dimensional (3D) porous reduced graphene oxide (rGO) is prepared by means of a microwave‐hydrothermal method, and then MnO2is introduced in situ and anchored into the pores of the 3D‐rGO through a novel vacuum‐impregnation method to obtain the 3D‐rGO/MnO2nanocomposite. SEM images show the honeycomb structure of the 3D‐rGO/MnO2, and MnO2is tightly anchored on the surface and into the pores of 3D‐rGO. 3D‐rGO/MnO2nanocomposite electrodes display excellent electrochemical capacitive behavior, owing to the synergetic effect between the porous 3D‐rGO with high conductivity and MnO2with high theoretical capacitance.The 3D‐rGO/MnO2‐5 sample, with an optimum MnO2content of (53.1%), gives the highest specific capacitance (278.5 F g−1at 1 A g−1) and good rate capability. This sample also has remarkable cycling stability (93.5% capacitance retention after 10000 cycles). The 3D‐rGO/MnO2nanocomposite could be considered as a potential candidate for supercapacitor electrode materials.