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Issue 20, 2020
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Facile synthesis of Mn-doped NiCo2O4 nanoparticles with enhanced electrochemical performance for a battery-type supercapacitor electrode

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Abstract

We report the synthesis of manganese-doped nickel cobalt oxide (Mn-doped NiCo2O4) nanoparticles (NPs) by an efficient hydrothermal and subsequent calcination route. The material exhibits a homogeneous distribution of the Mn dopant and a battery-type behavior when tested as a supercapacitor electrode material. Mn-doped NiCo2O4 NPs show an excellent specific capacity of 417 C g−1 at a scan rate of 10 mV s−1 and 204.3 C g−1 at a current density of 1 A g−1 in a standard three-electrode configuration, ca. 152–466% higher than that of pristine NiCo2O4 or MnCo2O4. In addition, Mn-doped NiCo2O4 NPs showed an excellent capacitance retention of 99% after 1000 charge–discharge cycles at a current density of 2 A g−1. The symmetric solid-state supercapacitor device assembled using this material delivered an energy density of 0.87 μW h cm−2 at a power density of 25 μW h cm−2 and 0.39 μW h cm−2 at a high power density of 500 μW h cm−2. The cost-effective synthesis and high electrochemical performance suggest that Mn-doped NiCo2O4 is a promising material for supercapacitors.

Graphical abstract: Facile synthesis of Mn-doped NiCo2O4 nanoparticles with enhanced electrochemical performance for a battery-type supercapacitor electrode

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Supplementary files

Article information


Submitted
28 Mar 2020
Accepted
28 Apr 2020
First published
29 Apr 2020

Dalton Trans., 2020,49, 6718-6729
Article type
Paper

Facile synthesis of Mn-doped NiCo2O4 nanoparticles with enhanced electrochemical performance for a battery-type supercapacitor electrode

T. V. Nguyen, L. T. Son, V. V. Thuy, V. D. Thao, M. Hatsukano, K. Higashimine, S. Maenosono, S. Chun and T. V. Thu, Dalton Trans., 2020, 49, 6718
DOI: 10.1039/D0DT01177K

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