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Ammonolysis Synthesis of Nickel Molybdenum Nitride Nanostructure for High-performance Asymmetric Supercapacitor

Abstract

Binary metal nitride nanorods of nickel-molybdenum nitride (Ni3Mo3N) are synthesized by a one-pot hydrothermal method followed by calcination at 400 °C and ammonolysis at 800 °C. The material is characterized by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Ni3Mo3N nanorods are tested as an electrode material for supercapacitor and 264 C g-1 specific capacity is exhibited at 0.5 A g-1 current density with the specific capacity of 108 C g-1 at high current density (5 A g-1) revealing 41% of rate capability. The Ni3Mo3N electrode retained 81.4 % of the specific capacity after 1000 cycles at 5 A g-1 current density in the three-electrode system. The full cell device with Ni3Mo3N nanorods as a cathode, activated carbon (AC) as an anode, and porous cellulose paper as a separator in 6 M KOH electrolyte, the Ni3Mo3N//AC asymmetric cell is assembled and exhibited the high specific capacity of 157 C g-1 at 1 A g-1 current density. Moreover, the asymmetric cell displayed excellent cycling stability of 95.7 % at a high current density (5 A g-1) after 3000 cycles and showed a maximum energy density of 34.89 Wh kg-1 at 800 W kg-1 power density. The overall electrochemical performance of Ni3Mo3N nanorods in a supercapacitor is remarkable and suggesting an ideal candidate for future electrochemical devices.

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Supplementary files

Article information


Submitted
04 Apr 2020
Accepted
28 Apr 2020
First published
28 Apr 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Ammonolysis Synthesis of Nickel Molybdenum Nitride Nanostructure for High-performance Asymmetric Supercapacitor

R. Kumar, T. Bhuvana and A. Sharma, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ01693D

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