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Rapid Production of Mn3O4/rGO as an Efficient Electrode Material for Supercapacitor by Flame Plasma

by Yang Zhou 1, Lei Guo 2,*, Wei Shi 2, Xuefeng Zou 1, Bin Xiang 1,3,* and Shaohua Xing 4,*
1
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
2
School of Material and Chemical Engineering, Tongren University, Tongren 554300, China
3
National-municipal Joint Engineering Laboratory for Chemical Process Intensification and Reaction, Chongqing 400044, China
4
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 26623, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(6), 881; https://doi.org/10.3390/ma11060881
Received: 7 May 2018 / Revised: 22 May 2018 / Accepted: 22 May 2018 / Published: 24 May 2018
Benefiting from good ion accessibility and high electrical conductivity, graphene-based material as electrodes show promising electrochemical performance in energy storage systems. In this study, a novel strategy is devised to prepare binder-free Mn3O4-reduced graphene oxide (Mn3O4/rGO) electrodes. Well-dispersed and homogeneous Mn3O4 nanosheets are grown on graphene layers through a facile chemical co-precipitation process and subsequent flame procedure. This obtained Mn3O4/rGO nanostructures exhibit excellent gravimetric specific capacitance of 342.5 F g−1 at current density of 1 A g−1 and remarkable cycling stability of 85.47% capacitance retention under 10,000 extreme charge/discharge cycles at large current density. Furthermore, an asymmetric supercapacitor assembled using Mn3O4/rGO and activated graphene (AG) delivers a high energy density of 27.41 Wh kg−1 and a maximum power density of 8 kW kg−1. The material synthesis strategy presented in this study is facile, rapid and simple, which would give an insight into potential strategies for large-scale applications of metal oxide/graphene and hold tremendous promise for power storage applications. View Full-Text
Keywords: Mn3O4; reduced graphene oxide; supercapacitors; flame plasma Mn3O4; reduced graphene oxide; supercapacitors; flame plasma
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Zhou, Y.; Guo, L.; Shi, W.; Zou, X.; Xiang, B.; Xing, S. Rapid Production of Mn3O4/rGO as an Efficient Electrode Material for Supercapacitor by Flame Plasma. Materials 2018, 11, 881.

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