期刊
MATERIALS
卷 11, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/ma11060881
关键词
Mn3O4; reduced graphene oxide; supercapacitors; flame plasma
类别
资金
- Chongqing Innovation Fund for Graduate Students [CYB16035]
- National Natural Science Foundation of China [21576034, 21706195]
- Guizhou Province Science Fund for Excellent Young Scholars [QKHTC2017-5604]
- Guizhou Provincial Department of Education Foundation [QJHKYZ2016-105]
- Science and Technology Program of Guizhou Province [QKHJC2016-1149]
- Innovative Research Team of Chongqing [CXTDG201602014]
- State Education Ministry
- Fundamental Research Funds for the Central Universities [106112017CDJQJ138802, 2017CDJSK04XK11, 106112016CDJXZ228803]
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.
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