|Title:||Fabrication of g-C <inf>3</inf> N <inf>4</inf> Nanomesh-Anchored Amorphous NiCoP <inf>2</inf> O <inf>7</inf> : Tuned Cycling Life and the Dynamic Behavior of a Hybrid Capacitor||Authors:||Karuppiah, Pandi
Chen, Shen Ming
|Issue Date:||28-Dec-2018||Journal Volume:||3||Journal Issue:||12||Source:||ACS Omega||Abstract:||
© 2018 American Chemical Society. Developing a novel electrode material with better electrochemical behavior and extended cyclability is a major issue in the field of hybrid capacitors. In this work, we propose a novel strategy for the facile synthesis of nickel-cobalt pyrophosphate nanoparticles anchored on graphitic carbon nitride (NiCoP 2 O 7 /g-C 3 N 4 ) via the simple solvothermal method. Field emission scanning electron microscopy and transmission electron microscopy analysis revealed the uniform anchoring of NiCoP 2 O 7 nanocomposite on g-C 3 N 4 nanosheets. Benefitting from the effect of amorphous nature and a conductive matrix of the NiCoP 2 O 7 /g-C 3 N 4 (NP3) composite, the material achieves a specific capacitance of 342 F g -1 at a scan rate of 5 mV s -1 . Impressively, the electrode shows long-term cycling stability with 100% capacitance retention over 5000 cycles. Employing activated carbon as an anode and as-prepared NP3 as a cathode, the assembled asymmetric hybrid cell exhibits high-energy density and exceptional cyclability (specific capacitance retention over 10 000 cycles). The outstanding electrochemical and cyclic stability is attributed to the shortest electron-ion pathway with effective interfacial interaction. The low electronic resistance of the NiCoP 2 O 7 /g-C 3 N 4 nanocomposite is revealed by varying the bias voltage variation in the electrochemical impedance spectroscopy. Our results promise better utilization of the bimetallic pyrophosphate-anchored g-C 3 N 4 matrix as a potential electrode for high-performance energy storage devices.
|Appears in Collections:||政治學系|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.