Polypyrrole-Modified NH 4 NiPO4·H2O Nanoplate Arrays on Ni Foam for Efficient Electrode in Electrochemical Capacitors.
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Release time:2021-02-28 Impact Factor:7.632 DOI number:10.1021/acssuschemeng.6b01347 Journal:ACS SUSTAINABLE CHEMISTRY & ENGINEERING Key Words:NICKEL-FOAM; NANOWIRE ARRAYS; ASYMMETRICAL SUPERCAPACITOR; NANOSHEET ARRAYS; PERFORMANCE; PHOSPHORIZATION; CONSTRUCTION; FABRICATION; NANOFLAKES; MICRORODS Abstract:The growth of active materials on Ni foam was proved to be an effective strategy to enhance redox reactions for electrochemical capacitors. But for NH4NiPO4 center dot H2O materials, a uniform nanostructure on Ni foam has not been achieved. Here, the NH4NiPO4 center dot H2O nanoplate arrays on Ni foam are fabricated by a facile solvothermal method. To further promote the transitions of current carries and benefit the electrochemical reactions, the surfaces of NH4NiPO4 center dot H2O nanoplate arrays were modified by a thin layer of polypyrrole through an in situ chemical polymerization method. The polypyrrole-modified NH4NiPO4 center dot H2O nanoplate arrays on Ni foam showed much enhanced specific capacitance in comparison with the bare NH4NiPO4 center dot H2O nanoplate arrays. When employing polypyrrole-modified NH4NiPO4 center dot H2O/Ni foam as a positive electrode and activated carbon as a negative electrode to assemble the asymmetric supercapacitor cells, favorable capacitance and cycling ability were achieved. Such a fabrication provides a feasible method to construct efficient electrodes for sustainable electrochemical energy storage. Indexed by:Journal paper Volume:4 Page Number:5578-5584 Translation or Not:no Date of Publication:2016-10-10 Included Journals:SCI -
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