Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications
Among the 2D materials, van der Waals heterostructures formed by vertically placing a monolayer of one 2D material over a single layer of another 2D material are gaining importance. As an alternative to such structures, ladder-like networks composed of two different 2D materials with an alternate ar...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-02-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0128738 |
| _version_ | 1827993300494188544 |
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| author | K. Pramoda C. N. R. Rao |
| author_facet | K. Pramoda C. N. R. Rao |
| author_sort | K. Pramoda |
| collection | DOAJ |
| description | Among the 2D materials, van der Waals heterostructures formed by vertically placing a monolayer of one 2D material over a single layer of another 2D material are gaining importance. As an alternative to such structures, ladder-like networks composed of two different 2D materials with an alternate arrangement of heterolayers can be generated by an electrostatic restacking strategy. The electrostatic restacking of 2D materials is achieved a great success. Various 2D/2D hetero-superlattices reported in the literature are MoS2/graphene, MnO2/Ti3C2, Ti3C2/graphene, NiAl–layered double hydroxides (LDHs)/graphene, and NiAl–LDHs/Ti3C2. The electrostatic restacking of different 2D materials generates novel 2D/2D hetero-superlattices. These hetero-superlattices display interesting electrocatalytic properties as supercapacitor electrodes, for water splitting reactions, as well as a noteworthy activity as cathode materials in lithium/sodium ion batteries. Ladder-like 3D networks of heterolayers obtained by phase-to-phase restacking improve charge-transfer interactions and the accessible area between active sites and electrolyte, thereby showing a higher electrocatalytic activity. The volumetric energy density of 32.6 Wh L−1 obtained with Ti3C2/graphene as a supercapacitor electrode is the highest reported among carbon-based materials. While the BCN/MoS2 superlattice shows a hydrogen evolution reaction (HER) activity comparable to Pt/C, unilamellar metallic MoS2/graphene and MnO2/graphene hetero-superlattices are reported to be efficient for both HER and sodium storage. The ambient instability of various 2D materials under electrocatalytic environments can be improved either by surface-functionalization or by forming hetero-superlattices. |
| first_indexed | 2024-04-10T04:24:00Z |
| format | Article |
| id | doaj.art-892f7ca3886045fba927e9a72937dd36 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-04-10T04:24:00Z |
| publishDate | 2023-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-892f7ca3886045fba927e9a72937dd362023-03-10T17:29:59ZengAIP Publishing LLCAPL Materials2166-532X2023-02-01112020901020901-1510.1063/5.0128738Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applicationsK. Pramoda0C. N. R. Rao1Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Bengaluru 562112, Karnataka, IndiaNew Chemistry Unit, School of Advanced Materials and International Centre for Material Science, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bengaluru 560064, IndiaAmong the 2D materials, van der Waals heterostructures formed by vertically placing a monolayer of one 2D material over a single layer of another 2D material are gaining importance. As an alternative to such structures, ladder-like networks composed of two different 2D materials with an alternate arrangement of heterolayers can be generated by an electrostatic restacking strategy. The electrostatic restacking of 2D materials is achieved a great success. Various 2D/2D hetero-superlattices reported in the literature are MoS2/graphene, MnO2/Ti3C2, Ti3C2/graphene, NiAl–layered double hydroxides (LDHs)/graphene, and NiAl–LDHs/Ti3C2. The electrostatic restacking of different 2D materials generates novel 2D/2D hetero-superlattices. These hetero-superlattices display interesting electrocatalytic properties as supercapacitor electrodes, for water splitting reactions, as well as a noteworthy activity as cathode materials in lithium/sodium ion batteries. Ladder-like 3D networks of heterolayers obtained by phase-to-phase restacking improve charge-transfer interactions and the accessible area between active sites and electrolyte, thereby showing a higher electrocatalytic activity. The volumetric energy density of 32.6 Wh L−1 obtained with Ti3C2/graphene as a supercapacitor electrode is the highest reported among carbon-based materials. While the BCN/MoS2 superlattice shows a hydrogen evolution reaction (HER) activity comparable to Pt/C, unilamellar metallic MoS2/graphene and MnO2/graphene hetero-superlattices are reported to be efficient for both HER and sodium storage. The ambient instability of various 2D materials under electrocatalytic environments can be improved either by surface-functionalization or by forming hetero-superlattices.http://dx.doi.org/10.1063/5.0128738 |
| spellingShingle | K. Pramoda C. N. R. Rao Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications APL Materials |
| title | Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications |
| title_full | Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications |
| title_fullStr | Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications |
| title_full_unstemmed | Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications |
| title_short | Electrostatic restacking of two-dimensional materials to generate novel hetero-superlattices and their energy applications |
| title_sort | electrostatic restacking of two dimensional materials to generate novel hetero superlattices and their energy applications |
| url | http://dx.doi.org/10.1063/5.0128738 |
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