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Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients
Metals such as Sb and Bi are important anode materials for sodium‐ion batteries because they feature a large capacity and low reaction potential. However, the accumulation of stress and strain upon sodium storage leads to the formation of cracks and fractures, resulting in electrode failure upon ext...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9165509/ https://www.ncbi.nlm.nih.gov/pubmed/35362272 http://dx.doi.org/10.1002/advs.202201209 |
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author | Wang, Zhenzhu Wang, Jie Ni, Jiangfeng Li, Liang |
author_facet | Wang, Zhenzhu Wang, Jie Ni, Jiangfeng Li, Liang |
author_sort | Wang, Zhenzhu |
collection | PubMed |
description | Metals such as Sb and Bi are important anode materials for sodium‐ion batteries because they feature a large capacity and low reaction potential. However, the accumulation of stress and strain upon sodium storage leads to the formation of cracks and fractures, resulting in electrode failure upon extended cycling. In this work, the design and construction of Bi(x)Sb(1−x) bimetallic alloy films with a compositional gradient to mitigate the intrinsic structural instability is reported. In the gradient film, the top is rich in Sb, contributing to the capacity, while the bottom is rich in Bi, helping to reduce the stress in the interphase between the film and the substrate. Significantly, this gradient film affords a high reversible capacity of ≈500 mAh g(−1) and sustains 82% of the initial capacity after 1000 cycles at 2 C, drastically outperforming the solid‐solution counterpart and many recently reported alloy anodes. Such a gradient design can open up the possibilities to engineering high‐capacity anode materials that are structurally unstable due to the huge volume variation upon energy storage. |
format | Online Article Text |
id | pubmed-9165509 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-91655092022-06-04 Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients Wang, Zhenzhu Wang, Jie Ni, Jiangfeng Li, Liang Adv Sci (Weinh) Research Articles Metals such as Sb and Bi are important anode materials for sodium‐ion batteries because they feature a large capacity and low reaction potential. However, the accumulation of stress and strain upon sodium storage leads to the formation of cracks and fractures, resulting in electrode failure upon extended cycling. In this work, the design and construction of Bi(x)Sb(1−x) bimetallic alloy films with a compositional gradient to mitigate the intrinsic structural instability is reported. In the gradient film, the top is rich in Sb, contributing to the capacity, while the bottom is rich in Bi, helping to reduce the stress in the interphase between the film and the substrate. Significantly, this gradient film affords a high reversible capacity of ≈500 mAh g(−1) and sustains 82% of the initial capacity after 1000 cycles at 2 C, drastically outperforming the solid‐solution counterpart and many recently reported alloy anodes. Such a gradient design can open up the possibilities to engineering high‐capacity anode materials that are structurally unstable due to the huge volume variation upon energy storage. John Wiley and Sons Inc. 2022-04-01 /pmc/articles/PMC9165509/ /pubmed/35362272 http://dx.doi.org/10.1002/advs.202201209 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Wang, Zhenzhu Wang, Jie Ni, Jiangfeng Li, Liang Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title | Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title_full | Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title_fullStr | Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title_full_unstemmed | Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title_short | Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients |
title_sort | structurally durable bimetallic alloy anodes enabled by compositional gradients |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9165509/ https://www.ncbi.nlm.nih.gov/pubmed/35362272 http://dx.doi.org/10.1002/advs.202201209 |
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