Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients
Abstract 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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-05-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202201209 |
| _version_ | 1828318283495899136 |
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| author | Zhenzhu Wang Jie Wang Jiangfeng Ni Liang Li |
| author_facet | Zhenzhu Wang Jie Wang Jiangfeng Ni Liang Li |
| author_sort | Zhenzhu Wang |
| collection | DOAJ |
| description | Abstract 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 BixSb1−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. |
| first_indexed | 2024-04-13T17:39:52Z |
| format | Article |
| id | doaj.art-949f281f2fa1488ba5f5ff8a3be85793 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-13T17:39:52Z |
| publishDate | 2022-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-949f281f2fa1488ba5f5ff8a3be857932022-12-22T02:37:13ZengWileyAdvanced Science2198-38442022-05-01916n/an/a10.1002/advs.202201209Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional GradientsZhenzhu Wang0Jie Wang1Jiangfeng Ni2Liang Li3School of Physical Science and Technology Center for Energy Conversion Materials & Physics (CECMP) Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 ChinaSchool of Physical Science and Technology Center for Energy Conversion Materials & Physics (CECMP) Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 ChinaSchool of Physical Science and Technology Center for Energy Conversion Materials & Physics (CECMP) Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 ChinaSchool of Physical Science and Technology Center for Energy Conversion Materials & Physics (CECMP) Jiangsu Key Laboratory of Thin Films Soochow University Suzhou 215006 ChinaAbstract 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 BixSb1−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.https://doi.org/10.1002/advs.202201209bimetallic alloyelectrochemical performancegradient electrodesodium‐ion batteries |
| spellingShingle | Zhenzhu Wang Jie Wang Jiangfeng Ni Liang Li Structurally Durable Bimetallic Alloy Anodes Enabled by Compositional Gradients Advanced Science bimetallic alloy electrochemical performance gradient electrode sodium‐ion batteries |
| 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 | bimetallic alloy electrochemical performance gradient electrode sodium‐ion batteries |
| url | https://doi.org/10.1002/advs.202201209 |
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