A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage
Metal chalcogenides are attractive anode materials for lithium-ion batteries (LIBs) due to their high theoretical capacities. With the advantages of low cost and abundance reserves, ZnS is regarded as the prime candidate anode material for future generations, but its practical application is hindere...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/5/2097 |
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| author | Wenhua Liao Qianqian Hu Xiaoshan Lin Ruibo Yan Guanghao Zhan Xiaohui Wu Xiaoying Huang |
| author_facet | Wenhua Liao Qianqian Hu Xiaoshan Lin Ruibo Yan Guanghao Zhan Xiaohui Wu Xiaoying Huang |
| author_sort | Wenhua Liao |
| collection | DOAJ |
| description | Metal chalcogenides are attractive anode materials for lithium-ion batteries (LIBs) due to their high theoretical capacities. With the advantages of low cost and abundance reserves, ZnS is regarded as the prime candidate anode material for future generations, but its practical application is hindered by the large volume expansion during repeated cycling processes and inherent poor conductivity. Rational design of the microstructure with large pore volume and high specific surface area is of great significance to solve these problems. Here, a carbon-coated ZnS yolk-shell structure (YS-ZnS@C) has been prepared by selective partial oxidation of a core-shell structured ZnS@C precursor in air and subsequent acid etching. Studies show that the carbon wrapping and proper etching to bring cavities can not only improve the material’s electrical conductivity, but can also effectively alleviate the volume expansion problem of ZnS during its cycles. As a LIB anode material, the YS-ZnS@C exhibits an obvious superiority in capacity and cycle life compared to ZnS@C. The YS-ZnS@C composite shows a discharge capacity of 910 mA h g<sup>−1</sup> at the current density of 100 mA g<sup>−1</sup> after 65 cycles, compared to only 604 mA h g<sup>−1</sup> for ZnS@C after 65 cycles. Notably, at a large current density of 3000 mA g<sup>−1</sup>, a capacity of 206 mA h g<sup>−1</sup> can still be maintained after 1000 cycles (over three times of the capacity for ZnS@C). It is expected that the synthetic strategy developed here is applicable to designing various high-performance metal chalcogenide-based anode materials for LIBs. |
| first_indexed | 2024-03-11T07:18:42Z |
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| language | English |
| last_indexed | 2024-03-11T07:18:42Z |
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| series | Materials |
| spelling | doaj.art-9428f598df4b4562ac664faedcc5bd892023-11-17T08:07:16ZengMDPI AGMaterials1996-19442023-03-01165209710.3390/ma16052097A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion StorageWenhua Liao0Qianqian Hu1Xiaoshan Lin2Ruibo Yan3Guanghao Zhan4Xiaohui Wu5Xiaoying Huang6State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaCollege of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, ChinaState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, ChinaMetal chalcogenides are attractive anode materials for lithium-ion batteries (LIBs) due to their high theoretical capacities. With the advantages of low cost and abundance reserves, ZnS is regarded as the prime candidate anode material for future generations, but its practical application is hindered by the large volume expansion during repeated cycling processes and inherent poor conductivity. Rational design of the microstructure with large pore volume and high specific surface area is of great significance to solve these problems. Here, a carbon-coated ZnS yolk-shell structure (YS-ZnS@C) has been prepared by selective partial oxidation of a core-shell structured ZnS@C precursor in air and subsequent acid etching. Studies show that the carbon wrapping and proper etching to bring cavities can not only improve the material’s electrical conductivity, but can also effectively alleviate the volume expansion problem of ZnS during its cycles. As a LIB anode material, the YS-ZnS@C exhibits an obvious superiority in capacity and cycle life compared to ZnS@C. The YS-ZnS@C composite shows a discharge capacity of 910 mA h g<sup>−1</sup> at the current density of 100 mA g<sup>−1</sup> after 65 cycles, compared to only 604 mA h g<sup>−1</sup> for ZnS@C after 65 cycles. Notably, at a large current density of 3000 mA g<sup>−1</sup>, a capacity of 206 mA h g<sup>−1</sup> can still be maintained after 1000 cycles (over three times of the capacity for ZnS@C). It is expected that the synthetic strategy developed here is applicable to designing various high-performance metal chalcogenide-based anode materials for LIBs.https://www.mdpi.com/1996-1944/16/5/2097yolk-shell structureZnS@C compositeselective oxidationelectrochemical propertieslithium-ion battery |
| spellingShingle | Wenhua Liao Qianqian Hu Xiaoshan Lin Ruibo Yan Guanghao Zhan Xiaohui Wu Xiaoying Huang A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage Materials yolk-shell structure ZnS@C composite selective oxidation electrochemical properties lithium-ion battery |
| title | A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage |
| title_full | A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage |
| title_fullStr | A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage |
| title_full_unstemmed | A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage |
| title_short | A Selective Oxidation Strategy towards the Yolk–Shell Structured ZnS@C Material for Ultra-Stable Li-Ion Storage |
| title_sort | selective oxidation strategy towards the yolk shell structured zns c material for ultra stable li ion storage |
| topic | yolk-shell structure ZnS@C composite selective oxidation electrochemical properties lithium-ion battery |
| url | https://www.mdpi.com/1996-1944/16/5/2097 |
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