Ternary Au/ZnO/rGO nanocomposites electrodes for high performance electrochemical storage devices

被引:33
作者
Chaudhary, Manchal [1 ]
Doong, Ruey-an [1 ,2 ]
Kumar, Nagesh [3 ,4 ]
Tseng, Tseung Yuen [3 ,4 ]
机构
[1] Natl Chiao Tung Univ, Inst Environm Engn, Hsinchu 30010, Taiwan
[2] Natl Tsing Hua Univ, Dept Biomed Engn & Environm Sci, Hsinchu 30013, Taiwan
[3] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 30010, Taiwan
[4] Natl Chiao Tung Univ, Inst Elect, Hsinchu 30010, Taiwan
关键词
Au nanoparticles; Zinc oxide; Reduced graphene oxide; Supercapacitor; Energy density; ORDERED POROUS CARBONS; FACILE PREPARATION; GRAPHENE; SUPERCAPACITOR; OXIDE; COMPOSITE; HYBRID; NANORODS; NANOPARTICLES; SCAFFOLD;
D O I
10.1016/j.apsusc.2017.05.088
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The combination of metal and metal oxide nanoparticles with reduced graphene oxides (rGO) is an active electrode material for electrochemical storage devices. Herein, we have, for the first time, reported the fabrication of ternary Au/ZnO/rGO nanocomposites by using a rapid and environmentally friendly microwave-assisted hydrothermal method for high performance supercapacitor applications. The ZnO/rGO provides excellent electrical conductivity and good macro/mesopore structures, which can facilitate the rapid electrons and ions transport. The Au nanoparticles with particle sizes of 7-12 nm are homogeneously distributed onto the ZnO/rGO surface to enhance the electrochemical performance by retaining the capacitance at high current density. The Au/ZnO/rGO nanocomposites, prepared with the optimized rGO amount of 100 mg exhibit a high specific capacitance of 875 and 424 F g(-1) at current densities of 1 and 20 A g-1, respectively, in 2 M KOH. In addition, the energy and power densities of ternary Au/ZnO/rGO can be up to 17.6-36.5 Wh kg(-1) and 0.27-5.42 kW kg(-1), respectively. Results obtained in this study clearly demonstrate the excellence of ternary Au/ZnO/rGO nanocomposites as the active electrode materials for electrochemical pseudocapacitor performance and can open an avenue to fabricate metal/metal oxide/rGO nanocomposites for electrochemical storage devices with both high energy and power densities. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:118 / 128
页数:11
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