https://doi.org/10.1140/epjp/s13360-023-04598-7
Regular Article
A promising approach: supercapattery and electrocatalytic hydrogen evolution utilizing magnesium manganese sulfide on MOF-encapsulated graphene
1
Department of Physics, Riphah International University, Campus Lahore, Lahore, Pakistan
2
Chemistry Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
3
School of Materials Science and Engineering, Yeungnam University, 280 Daehak-Ro, 38541, Gyeongsan, Gyeongbuk, Republic of Korea
b
waqas.iqbal@riphah.edu.pk
j
zahid.smr@yu.ac.kr
Received:
31
July
2023
Accepted:
16
October
2023
Published online:
24
October
2023
The quest for a revolutionary electrode material, one with exceptional electrochemical activity and remarkable stability, remains fervent as it promises to elevate the energy density of supercapacitors. A hydrothermal synthesis was used to successfully fabricate an improved electrode constituted of magnesium manganese sulfide nanosheets supported on MOF-Encapsulated Graphene Microspheres (MMP@MOF-EGM). The MMP@MOF-EGM electrode, which benefits from the distinctive characteristics and 3D electrode designs, had a high specific capacity of 2365 C/g at 2.0 A/g and outstanding cycling stability at 20 A/g. In addition, an asymmetric supercapacitor was developed by using an MMP@MOF-EGM and MOF-EGM. The energy density attained an amazing 68.3 Wh/kg at 1230 W/kg power. Additionally, the cycling stability of the MMP@MOF-EGM-2//MOF-EGM system demonstrated its mettle by sustaining an impressive 91% capacity through astonishing 25,000 cycles. The electrocatalyst MMP@MOF-EGM exhibited a significantly smaller Tafel slope of 53 mV/dec, indicating favorable reaction kinetics for the process. Additionally, the overpotential required for the catalyst to achieve a current density of 10 mA/cm2 was measured to be 143 mV, highlighting its efficient performance in facilitating the hydrogen evolution reaction. This innovative nanostructure design might pave the way for the development of high-performance supercapacitors.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjp/s13360-023-04598-7.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
