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Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials

Two-dimensional (2D) materials have opened new avenues for the fabrication of ultrathin, transparent, and flexible functional devices. However, the conventional inorganic graphene analogues are either semiconductors or insulators with low electronic conductivity, hindering their use as supercapacito...

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Detalles Bibliográficos
Autores principales: elAttar, Mahmoud M., Allam, Nageh K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8982093/
https://www.ncbi.nlm.nih.gov/pubmed/35424643
http://dx.doi.org/10.1039/d2ra00457g
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author elAttar, Mahmoud M.
Allam, Nageh K.
author_facet elAttar, Mahmoud M.
Allam, Nageh K.
author_sort elAttar, Mahmoud M.
collection PubMed
description Two-dimensional (2D) materials have opened new avenues for the fabrication of ultrathin, transparent, and flexible functional devices. However, the conventional inorganic graphene analogues are either semiconductors or insulators with low electronic conductivity, hindering their use as supercapacitor electrode materials, which require high conductivity and large surface area. Recently, 2D charge density wave (CDW) materials, such as 2D chalcogenides, have attracted extensive attention as high performance functional nanomaterials in sensors, energy conversion, and spintronic devices. Herein, TaS(2) is investigated as a potential CDW material for supercapacitors. The quantum capacitance (C(Q)) of the different TaS(2) polymorphs (1T, 2H, and 3R) was estimated using density functional theory calculations for different numbers of TaS(2) layers and alkali-metal ion (Li, Na and K) intercalants. The results demonstrate the potential of 2H- and 3R-polymorphs as efficient negative electrode materials for supercapacitor devices. The intercalation of K and Na ions in 1T-TaS(2) led to an increase in the C(Q) with the intercalation of Li ions resulting in a decrease in the C(Q). In contrast, Li ions were found to be the best intercalant for the 2H-TaS(2) phase (highest C(Q)), while K ion intercalation was the best for the 3R-TaS(2) phase. Moreover, increasing the number of layers of the1T-TaS(2) resulted in the highest C(Q). In contrast, C(Q) increases upon decreasing the number of layers of 2H-TaS(2). Both 1T-MoS(2) and 2H-TaS(2) can be combined to construct a highly performing supercapacitor device as the positive and negative electrodes, respectively.
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spelling pubmed-89820932022-04-13 Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials elAttar, Mahmoud M. Allam, Nageh K. RSC Adv Chemistry Two-dimensional (2D) materials have opened new avenues for the fabrication of ultrathin, transparent, and flexible functional devices. However, the conventional inorganic graphene analogues are either semiconductors or insulators with low electronic conductivity, hindering their use as supercapacitor electrode materials, which require high conductivity and large surface area. Recently, 2D charge density wave (CDW) materials, such as 2D chalcogenides, have attracted extensive attention as high performance functional nanomaterials in sensors, energy conversion, and spintronic devices. Herein, TaS(2) is investigated as a potential CDW material for supercapacitors. The quantum capacitance (C(Q)) of the different TaS(2) polymorphs (1T, 2H, and 3R) was estimated using density functional theory calculations for different numbers of TaS(2) layers and alkali-metal ion (Li, Na and K) intercalants. The results demonstrate the potential of 2H- and 3R-polymorphs as efficient negative electrode materials for supercapacitor devices. The intercalation of K and Na ions in 1T-TaS(2) led to an increase in the C(Q) with the intercalation of Li ions resulting in a decrease in the C(Q). In contrast, Li ions were found to be the best intercalant for the 2H-TaS(2) phase (highest C(Q)), while K ion intercalation was the best for the 3R-TaS(2) phase. Moreover, increasing the number of layers of the1T-TaS(2) resulted in the highest C(Q). In contrast, C(Q) increases upon decreasing the number of layers of 2H-TaS(2). Both 1T-MoS(2) and 2H-TaS(2) can be combined to construct a highly performing supercapacitor device as the positive and negative electrodes, respectively. The Royal Society of Chemistry 2022-02-23 /pmc/articles/PMC8982093/ /pubmed/35424643 http://dx.doi.org/10.1039/d2ra00457g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
elAttar, Mahmoud M.
Allam, Nageh K.
Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title_full Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title_fullStr Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title_full_unstemmed Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title_short Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials
title_sort untapped potential of 2d charge density wave chalcogenides as negative supercapacitor electrode materials
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8982093/
https://www.ncbi.nlm.nih.gov/pubmed/35424643
http://dx.doi.org/10.1039/d2ra00457g
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