Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries
Cu@Si core–shell nanowire thin films with a Cu<sub>3</sub>Si interface between the Cu and Si were synthesized by slurry casting and subsequent magnetron sputtering and investigated as anode materials for lithium ion batteries. In this constructed core–shell architecture, the Cu nanowires...
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/10/4521 |
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| author | Lifeng Zhang Linchao Zhang Zhuoming Xie Junfeng Yang |
| author_facet | Lifeng Zhang Linchao Zhang Zhuoming Xie Junfeng Yang |
| author_sort | Lifeng Zhang |
| collection | DOAJ |
| description | Cu@Si core–shell nanowire thin films with a Cu<sub>3</sub>Si interface between the Cu and Si were synthesized by slurry casting and subsequent magnetron sputtering and investigated as anode materials for lithium ion batteries. In this constructed core–shell architecture, the Cu nanowires were connected to each other or to the Cu foil, forming a three-dimensional electron-conductive network and as mechanical support for the Si during cycling. Meanwhile, the Cu<sub>3</sub>Si layer can enhance the interface adhesion strength of the Cu core and Si shell; a large amount of void spaces between the Cu@Si nanowires could accommodate the lithiation-induced volume expansion and facilitate electrolyte impregnation. As a consequence, this electrode exhibits impressive electrochemical properties: the initial discharge capacity and initial coulombic efficiency is 3193 mAh/g and 87%, respectively. After 500 cycles, the discharge capacity is about 948 mAh/g, three times that of graphite, corresponding to an average capacity fading rate of 0.2% per cycle. |
| first_indexed | 2024-03-10T11:23:10Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T11:23:10Z |
| publishDate | 2021-05-01 |
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| spelling | doaj.art-a3b9fa238672438b94aba431cc2188b82023-11-21T19:54:54ZengMDPI AGApplied Sciences2076-34172021-05-011110452110.3390/app11104521Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion BatteriesLifeng Zhang0Linchao Zhang1Zhuoming Xie2Junfeng Yang3Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230032, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230032, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230032, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230032, ChinaCu@Si core–shell nanowire thin films with a Cu<sub>3</sub>Si interface between the Cu and Si were synthesized by slurry casting and subsequent magnetron sputtering and investigated as anode materials for lithium ion batteries. In this constructed core–shell architecture, the Cu nanowires were connected to each other or to the Cu foil, forming a three-dimensional electron-conductive network and as mechanical support for the Si during cycling. Meanwhile, the Cu<sub>3</sub>Si layer can enhance the interface adhesion strength of the Cu core and Si shell; a large amount of void spaces between the Cu@Si nanowires could accommodate the lithiation-induced volume expansion and facilitate electrolyte impregnation. As a consequence, this electrode exhibits impressive electrochemical properties: the initial discharge capacity and initial coulombic efficiency is 3193 mAh/g and 87%, respectively. After 500 cycles, the discharge capacity is about 948 mAh/g, three times that of graphite, corresponding to an average capacity fading rate of 0.2% per cycle.https://www.mdpi.com/2076-3417/11/10/4521lithium ion batteryanodesiliconcore–shell structuremagnetron sputtering |
| spellingShingle | Lifeng Zhang Linchao Zhang Zhuoming Xie Junfeng Yang Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries Applied Sciences lithium ion battery anode silicon core–shell structure magnetron sputtering |
| title | Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries |
| title_full | Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries |
| title_fullStr | Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries |
| title_full_unstemmed | Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries |
| title_short | Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries |
| title_sort | cu si core shell nanowire thin film as high performance anode materials for lithium ion batteries |
| topic | lithium ion battery anode silicon core–shell structure magnetron sputtering |
| url | https://www.mdpi.com/2076-3417/11/10/4521 |
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