A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage
Abstract Metal amides are attractive candidates for hydrogen storage due to their high volumetric and gravimetric hydrogen densities. However, the sluggish kinetics and competing side reactions during hydrogen uptake and release limit their practical use. Here, a novel nanoconfined Li2Mg(NH)2@reduce...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2023-09-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202300310 |
| _version_ | 1797676479627132928 |
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| author | Chaochao Dun Sichi Li Linfeng Chen Robert D. Horton Mark D. Allendorf Brandon C. Wood Vitalie Stavila Jeffrey J. Urban |
| author_facet | Chaochao Dun Sichi Li Linfeng Chen Robert D. Horton Mark D. Allendorf Brandon C. Wood Vitalie Stavila Jeffrey J. Urban |
| author_sort | Chaochao Dun |
| collection | DOAJ |
| description | Abstract Metal amides are attractive candidates for hydrogen storage due to their high volumetric and gravimetric hydrogen densities. However, the sluggish kinetics and competing side reactions during hydrogen uptake and release limit their practical use. Here, a novel nanoconfined Li2Mg(NH)2@reduced graphene oxide (rGO) composite is presented, which is fabricated using a melt‐infiltration method with a minimum weight penalty of only 2 wt.%. The presence of rGO ensures close contact between the active phases, effectively preventing aggregation during cycling process. As a result, the reversible capacity of Li2Mg(NH)2@rGO reaches 4.42 wt.%, with no capacity degradation observed after multiple cycling. Theoretical calculations show that rGO catalyzes the hydrogen bond cleavage at the Mg‐amide/Li hydride interface, leading to local dehydrogenation hotspots and significantly improves kinetics of dehydrogenation compared to the bulk counterpart. This study provides a promising strategy for designing metal imide‐based composites to overcome the kinetic limitations and improve their reversible hydrogen storage performance. |
| first_indexed | 2024-03-11T22:29:42Z |
| format | Article |
| id | doaj.art-49a25fa8c56246988c9f4aa5be05f4e4 |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-11T22:29:42Z |
| publishDate | 2023-09-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-49a25fa8c56246988c9f4aa5be05f4e42023-09-23T07:05:54ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-09-011027n/an/a10.1002/admi.202300310A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 StorageChaochao Dun0Sichi Li1Linfeng Chen2Robert D. Horton3Mark D. Allendorf4Brandon C. Wood5Vitalie Stavila6Jeffrey J. Urban7The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USALawrence Livermore National Laboratory 7000 East Avenue Livermore CA 94550 USAThe Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USASandia National Laboratories Livermore CA 94550 USASandia National Laboratories Livermore CA 94550 USALawrence Livermore National Laboratory 7000 East Avenue Livermore CA 94550 USASandia National Laboratories Livermore CA 94550 USAThe Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USAAbstract Metal amides are attractive candidates for hydrogen storage due to their high volumetric and gravimetric hydrogen densities. However, the sluggish kinetics and competing side reactions during hydrogen uptake and release limit their practical use. Here, a novel nanoconfined Li2Mg(NH)2@reduced graphene oxide (rGO) composite is presented, which is fabricated using a melt‐infiltration method with a minimum weight penalty of only 2 wt.%. The presence of rGO ensures close contact between the active phases, effectively preventing aggregation during cycling process. As a result, the reversible capacity of Li2Mg(NH)2@rGO reaches 4.42 wt.%, with no capacity degradation observed after multiple cycling. Theoretical calculations show that rGO catalyzes the hydrogen bond cleavage at the Mg‐amide/Li hydride interface, leading to local dehydrogenation hotspots and significantly improves kinetics of dehydrogenation compared to the bulk counterpart. This study provides a promising strategy for designing metal imide‐based composites to overcome the kinetic limitations and improve their reversible hydrogen storage performance.https://doi.org/10.1002/admi.202300310hydrogen storagekinetics of dehydrogenationsmelt infiltrationsnanoconfinementreduced graphene oxides |
| spellingShingle | Chaochao Dun Sichi Li Linfeng Chen Robert D. Horton Mark D. Allendorf Brandon C. Wood Vitalie Stavila Jeffrey J. Urban A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage Advanced Materials Interfaces hydrogen storage kinetics of dehydrogenations melt infiltrations nanoconfinement reduced graphene oxides |
| title | A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage |
| title_full | A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage |
| title_fullStr | A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage |
| title_full_unstemmed | A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage |
| title_short | A Nanoscale Ternary Amide‐rGO Composite with Boosted Kinetics for Reversible H2 Storage |
| title_sort | nanoscale ternary amide rgo composite with boosted kinetics for reversible h2 storage |
| topic | hydrogen storage kinetics of dehydrogenations melt infiltrations nanoconfinement reduced graphene oxides |
| url | https://doi.org/10.1002/admi.202300310 |
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