Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials
Silicon-containing polyester from tetramethoxysilane, ethylene glycol, and o-Phthalic anhydride were used as encapsulating materials for silicon nano powders (SiNP) via electrospinning, with Polyacrylonitrile (PAN) as spinning additives. In the correct quantities, SiNP could be well encapsulated in...
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MDPI AG
2023-05-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/9/3566 |
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| author | Man Xiong Xuan Bie Yawei Dong Ben Wang Qunchao Zhang Xuejun Xie Tong Liu Ronghua Huang |
| author_facet | Man Xiong Xuan Bie Yawei Dong Ben Wang Qunchao Zhang Xuejun Xie Tong Liu Ronghua Huang |
| author_sort | Man Xiong |
| collection | DOAJ |
| description | Silicon-containing polyester from tetramethoxysilane, ethylene glycol, and o-Phthalic anhydride were used as encapsulating materials for silicon nano powders (SiNP) via electrospinning, with Polyacrylonitrile (PAN) as spinning additives. In the correct quantities, SiNP could be well encapsulated in nano fibers (200–400 nm) using scanning electron microscopy (SEM). The encapsulating materials were then carbonized to a Si-O-C material at 755 °C (Si@C-SiNF-5 and Si@C-SiNF-10, with different SiNP content). Fiber structure and SiNP crystalline structure were reserved even after high-temperature treatment, as SEM and X-ray diffraction (XRD) verified. When used as lithium ion battery (LIB) anode materials, the cycling stability of SiNPs increased after encapsulation. The capacity of SiNPs decreased to ~10 mAh/g within 30 cycles, while those from Si@C-SiNF-5 and Si@C-SiNF-10 remained over 500 mAh/g at the 30th cycle. We also found that adequate SiNP content is necessary for good encapsulation and better cycling stability. In the anode from Si@C-SiNF-10 in which SiNPs were not well encapsulated, fibers were broken and pulverized as SEM confirmed; thus, its cycling stability is poorer than that from Si@C-SiNF-5. |
| first_indexed | 2024-03-11T04:13:15Z |
| format | Article |
| id | doaj.art-74edc738527b422a850ab38e038c1331 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T04:13:15Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-74edc738527b422a850ab38e038c13312023-11-17T23:17:49ZengMDPI AGMaterials1996-19442023-05-01169356610.3390/ma16093566Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode MaterialsMan Xiong0Xuan Bie1Yawei Dong2Ben Wang3Qunchao Zhang4Xuejun Xie5Tong Liu6Ronghua Huang7School of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Materials Science and Engineering, Hubei University, Wuhan 430060, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSchool of Power & Mechanical Engineering, Wuhan University, Wuhan 430072, ChinaSilicon-containing polyester from tetramethoxysilane, ethylene glycol, and o-Phthalic anhydride were used as encapsulating materials for silicon nano powders (SiNP) via electrospinning, with Polyacrylonitrile (PAN) as spinning additives. In the correct quantities, SiNP could be well encapsulated in nano fibers (200–400 nm) using scanning electron microscopy (SEM). The encapsulating materials were then carbonized to a Si-O-C material at 755 °C (Si@C-SiNF-5 and Si@C-SiNF-10, with different SiNP content). Fiber structure and SiNP crystalline structure were reserved even after high-temperature treatment, as SEM and X-ray diffraction (XRD) verified. When used as lithium ion battery (LIB) anode materials, the cycling stability of SiNPs increased after encapsulation. The capacity of SiNPs decreased to ~10 mAh/g within 30 cycles, while those from Si@C-SiNF-5 and Si@C-SiNF-10 remained over 500 mAh/g at the 30th cycle. We also found that adequate SiNP content is necessary for good encapsulation and better cycling stability. In the anode from Si@C-SiNF-10 in which SiNPs were not well encapsulated, fibers were broken and pulverized as SEM confirmed; thus, its cycling stability is poorer than that from Si@C-SiNF-5.https://www.mdpi.com/1996-1944/16/9/3566silicon anodeslithium ion batteryelectrospinningencapsulation |
| spellingShingle | Man Xiong Xuan Bie Yawei Dong Ben Wang Qunchao Zhang Xuejun Xie Tong Liu Ronghua Huang Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials Materials silicon anodes lithium ion battery electrospinning encapsulation |
| title | Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials |
| title_full | Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials |
| title_fullStr | Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials |
| title_full_unstemmed | Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials |
| title_short | Encapsulation of Silicon Nano Powders via Electrospinning as Lithium Ion Battery Anode Materials |
| title_sort | encapsulation of silicon nano powders via electrospinning as lithium ion battery anode materials |
| topic | silicon anodes lithium ion battery electrospinning encapsulation |
| url | https://www.mdpi.com/1996-1944/16/9/3566 |
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