کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1283427 | 1497903 | 2016 | 9 صفحه PDF | دانلود رایگان |
• The NiCoO2 flowers were grown in the NiCoO2 flakes coated Ni foam.
• The NiCoO2/Ni foam was directly used as the working electrode without any binders.
• The specific capacitance of NiCoO2/Ni foam can reach 756 F/g at 0.75 A/g.
• The NiCoO2/Ni foam//rGO hybrid supercapacitor show high energy density.
Many NiCoO2 flowers with an average diameter of about 4 μm were grown on the NiCoO2 flakes coated Ni foam (denoted as NiCoO2/Ni foam) through a simple hydrothermal method and confirmed by scanning and transmission electron microscopies, X-ray diffraction and X-ray photoelectron spectrum measurements. The NiCoO2/Ni foam with high specific area and porosity was directly used as the working electrode without any binders. The measured specific capacitance of NiCoO2 grown on Ni foam is 756 F/g at 0.75 A/g using a three-electrode setup in 1 M KOH. Considering the high capacity of NiCoO2 and the good stability of rGO, the NiCoO2/Ni foam//rGO hybrid supercapacitor combining NiCoO2/Ni foam and rGO shows very good properties, such as high specific capacitance (82 F/g at 2 A/g based on the total mass of active materials), high energy density (25.7 Wh/kg at 1500 W/kg based on the total mass of active materials), good stability (about 90% capacitance retention after 2000-cycle at 100 mV/s), and low charge ion transfer resistance.
Journal: Journal of Power Sources - Volume 329, 15 October 2016, Pages 238–246