期刊
NEW JOURNAL OF CHEMISTRY
卷 42, 期 18, 页码 14956-14964出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nj01908h
关键词
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资金
- National Natural Science Foundation of China [20963009, 21163017, 21563027]
- Natural Science Foundation of Gansu Province, China [17JR5RA080]
- Specialized Research Fund for the Doctoral Program of Higher Education [20126203110001]
The naphthoquinone and RuO2 hybrid graphene hydrogel (NQ-RuO2/SGH) composite, which can be a suitable positive electrode material of an asymmetric supercapacitor, is prepared via a two-step process. The RuO2/graphene hydrogel composite (RuO2/SGH) is first synthesized through a simple hydrothermal method by using oxidized graphite (GO) and RuCl3 as raw materials, and then, 1,4-naphthoquinone (NQ) molecules are adsorbed on the exposed graphene hydrogel surface of the RuO2/SGH composite via a - stacking interaction. The electrochemical tests show that the NQ-RuO2/SGH composite delivers a high specific capacitance (450.8 F g(-1)) even at a low RuO2 loading mass (14.6%), meanwhile, an asymmetric supercapacitor (ASC) is constructed by using NQ-RuO2/SGH as the positive electrode and a nitrogen-doped porous carbon material (MNC) as the negative electrode. The electrochemical measurements prove that the energy density of the ASC can reach up to 16.3 W h kg(-1) in a 1 M H2SO4 electrolyte.
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