Design and synthesis of nitrogen-doped hexagonal NiCoO nanoplates derived from Ni-Co-MOF for high-performance electrochemical energy storage |
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| Institution: | 1. Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, China;2. School of Chemistry and Chemical Engineering, Guangling College, Yangzhou University, Yangzhou 225009, China;3. School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China;1. College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China;2. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China;3. Jinhua Huanke Environmental Technology Co. LTD, Jinhua, 321004, China |
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| Abstract: | In order to further improve the potential application of nickel-cobalt oxide (NiCoO) in supercapacitors, we use controlled calcination of different Ni-Co-MOF (NiCo(HBTC)(4,4′-bipy)]) composites to obtain five kinds of nickel doped NiCoO (N-NiCoO) with different Ni/Co molar ratio. These N-NiCoO materials with unique hexagonal nanoplates structure, high specific surface area and high porosity indicate high and stable electrochemical activity. In particular, N-NiCoO-2 with a Ni/Co molar ratio of 2:1 exhibits the highest 945.79 F/g specific capacitance at 1 A/g and a high cycle stability of only 6.7% attenuation after 5000 cycles. Apart from the certain percentage of NiCoO with higher conductivity, nitrogen doping provides more reactive sites and the specific porous hexagonal nanoplates structure of the product itself accelerate electron transfer and promote electrolyte diffusion can more effectively enhance the electrochemical performance. Therefore, N-NiCoO synthesized via a simple method exhibit exciting potential and can be used as an electrode material for supercapacitors with good performance. |
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| Keywords: | Ni-Co-MOF N-NiCoO Solvothermal Supercapacitors Electrochemical performance |
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