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Article

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

1
Battery Research Center of Green Energy, Ming Chi University of Technology, 84 Gungjuan Rd., Taishan District, New Taipei City 24301, Taiwan
2
Tabbin Institute for Metallurgical Studies (TIMS), Tabbin, Helwan 109, Cairo 11421, Egypt
3
Department of Chemical Engineering, Ming Chi University of Technology, 84 Gungjuan Rd., Taishan District, New Taipei City 24301, Taiwan
4
Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua 1st Rd., Guishan District, Taoyuan 33302, Taiwan
*
Author to whom correspondence should be addressed.
These authors contributed to this work equally.
Academic Editor: Tsung-Shine Ko
Nanomaterials 2021, 11(7), 1867; https://doi.org/10.3390/nano11071867
Received: 29 June 2021 / Revised: 13 July 2021 / Accepted: 19 July 2021 / Published: 20 July 2021
(This article belongs to the Special Issue Synthesis, Characteristics, and Applications of Nanocomposites)
Supercapacitors (SCs) have been regarded as alternative electrochemical energy storage devices; however, optimizing the electrode materials to further enhance their specific energy and retain their rate capability is highly essential. Herein, the influence of nitrogen content and structural characteristics (i.e., porous and non-porous) of the NiS/nitrogen-doped carbon nanocomposites on their electrochemical performances in an alkaline electrolyte is explored. Due to their distinctive surface and the structural features of the porous carbon (A-PVP-NC), the as-synthesized NiS/A-PVP-NC nanocomposites not only reveal a high wettability with 6 M KOH electrolyte and less polarization but also exhibit remarkable rate capability (101 C/g at 1 A/g and 74 C/g at 10 A/g). Although non-porous carbon (PI-NC) possesses more nitrogen content than the A-PVP-NC, the specific capacity output from the latter at 10 A/g is 3.7 times higher than that of the NiS/PI-NC. Consequently, our findings suggest that the surface nature and porous architectures that exist in carbon materials would be significant factors affecting the electrochemical behavior of electrode materials compared to nitrogen content. View Full-Text
Keywords: transition metal sulfides; polymer-derived nitrogen-doped carbon; microwave-assisted synthesis; supercapacitors; alkaline electrolyte transition metal sulfides; polymer-derived nitrogen-doped carbon; microwave-assisted synthesis; supercapacitors; alkaline electrolyte
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MDPI and ACS Style

Abdelaal, M.M.; Hung, T.-C.; Mohamed, S.G.; Yang, C.-C.; Huang, H.-P.; Hung, T.-F. A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium. Nanomaterials 2021, 11, 1867. https://doi.org/10.3390/nano11071867

AMA Style

Abdelaal MM, Hung T-C, Mohamed SG, Yang C-C, Huang H-P, Hung T-F. A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium. Nanomaterials. 2021; 11(7):1867. https://doi.org/10.3390/nano11071867

Chicago/Turabian Style

Abdelaal, Mohamed M., Tzu-Cheng Hung, Saad G. Mohamed, Chun-Chen Yang, Huei-Ping Huang, and Tai-Feng Hung. 2021. "A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium" Nanomaterials 11, no. 7: 1867. https://doi.org/10.3390/nano11071867

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