Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling
Silicon (Si)-based anode materials can increase the energy density of lithium (Li)-ion batteries owing to the high weight and volume capacity of Si. However, their electrochemical properties rapidly deteriorate due to large volume changes in the electrode resulting from repeated charging and dischar...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/5/1873 |
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| author | Kikang Lee Jejun Jeong Yeoneyi Chu Jongbeom Kim Kyuhwan Oh Jeongtak Moon |
| author_facet | Kikang Lee Jejun Jeong Yeoneyi Chu Jongbeom Kim Kyuhwan Oh Jeongtak Moon |
| author_sort | Kikang Lee |
| collection | DOAJ |
| description | Silicon (Si)-based anode materials can increase the energy density of lithium (Li)-ion batteries owing to the high weight and volume capacity of Si. However, their electrochemical properties rapidly deteriorate due to large volume changes in the electrode resulting from repeated charging and discharging. In this study, we manufactured structurally stable Fe–Si alloy powders by performing high-energy milling for up to 24 h through the reduction of the Si phase size and the formation of the α-FeSi<sub>2</sub> phase. The cause behind the deterioration of the electrochemical properties of the Fe–Si alloy powder produced by over-milling (milling for an increased time) was investigated. The 12 h milled Fe–Si alloy powder showed the best electrochemical properties. Through the microstructural analysis of the Fe–Si alloy powders after the evaluation of half/full coin cells, powder resistance tests, and charge/discharge cycles, it was found that this was due to the low electrical conductivity and durability of β-FeSi<sub>2</sub>. The findings provide insight into the possible improvements in battery performance through the commercialization of Fe–Si alloy powders produced by over-milling in a mechanical alloying process. |
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| id | doaj.art-7e07be304b9a4f24a0e1276e345f0bec |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T20:32:07Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-7e07be304b9a4f24a0e1276e345f0bec2023-11-23T23:20:11ZengMDPI AGMaterials1996-19442022-03-01155187310.3390/ma15051873Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical MillingKikang Lee0Jejun Jeong1Yeoneyi Chu2Jongbeom Kim3Kyuhwan Oh4Jeongtak Moon5Research and Development Center, MK Electron, Yongin 17030, KoreaDepartment of Materials Science and Engineering, Seoul National University, Seoul 08826, KoreaResearch and Development Center, MK Electron, Yongin 17030, KoreaDepartment of Materials Science and Engineering, Seoul National University, Seoul 08826, KoreaDepartment of Materials Science and Engineering, Seoul National University, Seoul 08826, KoreaResearch and Development Center, MK Electron, Yongin 17030, KoreaSilicon (Si)-based anode materials can increase the energy density of lithium (Li)-ion batteries owing to the high weight and volume capacity of Si. However, their electrochemical properties rapidly deteriorate due to large volume changes in the electrode resulting from repeated charging and discharging. In this study, we manufactured structurally stable Fe–Si alloy powders by performing high-energy milling for up to 24 h through the reduction of the Si phase size and the formation of the α-FeSi<sub>2</sub> phase. The cause behind the deterioration of the electrochemical properties of the Fe–Si alloy powder produced by over-milling (milling for an increased time) was investigated. The 12 h milled Fe–Si alloy powder showed the best electrochemical properties. Through the microstructural analysis of the Fe–Si alloy powders after the evaluation of half/full coin cells, powder resistance tests, and charge/discharge cycles, it was found that this was due to the low electrical conductivity and durability of β-FeSi<sub>2</sub>. The findings provide insight into the possible improvements in battery performance through the commercialization of Fe–Si alloy powders produced by over-milling in a mechanical alloying process.https://www.mdpi.com/1996-1944/15/5/1873anode materiallithium-ion batterymechanical millingsilicon nanocompositeiron silicide |
| spellingShingle | Kikang Lee Jejun Jeong Yeoneyi Chu Jongbeom Kim Kyuhwan Oh Jeongtak Moon Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling Materials anode material lithium-ion battery mechanical milling silicon nanocomposite iron silicide |
| title | Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling |
| title_full | Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling |
| title_fullStr | Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling |
| title_full_unstemmed | Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling |
| title_short | Properties of Fe–Si Alloy Anode for Lithium-Ion Battery Synthesized Using Mechanical Milling |
| title_sort | properties of fe si alloy anode for lithium ion battery synthesized using mechanical milling |
| topic | anode material lithium-ion battery mechanical milling silicon nanocomposite iron silicide |
| url | https://www.mdpi.com/1996-1944/15/5/1873 |
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