期刊
ELECTROCHIMICA ACTA
卷 295, 期 -, 页码 14-21出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.10.134
关键词
Graphene nanosheets; Vanadium pentoxide nanobelts; Hydrothermal supercapacitors
资金
- National Natural Science Foundation of China [61574091]
- Natural Science Foundation of Shanghai [17ZR1414100]
- Research Center of DC Science & Technology Co. Ltd.
Supercapacitors based on two-dimensional (2D) ultrathin nanomaterials of reduced graphene oxide (rGO) and vanadium pentoxide (V2O5) are rapidly growing, but constructing three-dimensional (3D) skeleton networks structure with both high energy density and superior cycle stability remains challenging. In this work, supercapacitor based on 3D skeleton networks of rGO nanosheets/V2O5 nanobelts hybrids has been successfully constructed via a simple one-pot hydrothermal method. The resultant rGO/ V2O5 hybrid aerogel electrodes show a high specific capacitance of 310.1 F g(-1) (1 A g(-1)) and 195.2 F g(-1) (10 A g(-1)). Moreover, the assembled symmetric supercapacitors based on as-fabricated hybrid electrodes deliver a high gravimetric capacitance of 225.6 F g(-1) (0.5 A g(-1)), a high energy density of 31.3Wh kg(-1) (249.7 Wkg(-1)) and excellent long-term cycle stability (remain 90.2% after 5000 cycles). Above all, the as-designed 3D skeleton networks, with rGO nanosheets and V2O5 nanobelts hybrids intimately stacked, can give a guidance for designing other high-performance graphene-based electrodes and hold a great potential for high-performance electrical energy storages. (C) 2018 Elsevier Ltd. All rights reserved.
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