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Issue 13, 2020
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A novel electrode for supercapacitors: efficient PVP-assisted synthesis of Ni3S2 nanostructures grown on Ni foam for energy storage

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Abstract

In this academic research, we report the polyvinylpyrrolidone (PVP) assisted synthesis of a Ni3S2 electrode material containing a plentiful number of active sites on Ni foam by a novel hydrothermal approach. Interestingly, the Ni3S2 electrode is a highly efficient electroactive material, as evidenced by the physical and electrochemical characterization. Based on the physical characterization, the constructed Ni3S2 nano architecture exhibited plentiful electroactive sites, quick charge/discharge transportation and better maximum conductivity, which gave rise to enhanced electrochemical activity for large-scale supercapacitors (SCs). Besides, the electrochemical characterization of the as-developed Ni3S2 electrode obviously displayed a faradaic battery-based redox profile, which is distinct from the profiles of carbon-type materials. The battery-based PVP-assisted Ni3S2 electrode achieved impressive electrochemical activity, namely exceptional SC activity with a superior specific capacity of ∼316.8 mA h g−1 at 2 A g−1 current density, high rate capability with ∼91.4% of capacity retained at 20 A g−1, and superb cycling performance with ∼96.7% of capacity retained at 6 A g−1 after 4000 cycles. Thus, considering the best findings above, the as-developed PVP-assisted Ni3S2 is a highly efficient candidate for SCs and could effectively serve in various advanced energy storage applications.

Graphical abstract: A novel electrode for supercapacitors: efficient PVP-assisted synthesis of Ni3S2 nanostructures grown on Ni foam for energy storage

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Supplementary files

Article information


Submitted
17 Jan 2020
Accepted
10 Feb 2020
First published
10 Feb 2020

Dalton Trans., 2020,49, 4050-4059
Article type
Paper

A novel electrode for supercapacitors: efficient PVP-assisted synthesis of Ni3S2 nanostructures grown on Ni foam for energy storage

Y. Anil Kumar, K. Dasha Kumar and H. Kim, Dalton Trans., 2020, 49, 4050
DOI: 10.1039/D0DT00191K

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