Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries
Abstract Silicon is considered as the most promising anode material for high performance lithium-ion batteries due to its high theoretical specific capacity and low working potential. However, severe volume expansion problems existing during the process of (de)intercalation which seriously hinders i...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-45763-3 |
| _version_ | 1797636960614875136 |
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| author | Xiaofei Lou Yuanyuan Zhang Li Zhao Teng Zhang Hui Zhang |
| author_facet | Xiaofei Lou Yuanyuan Zhang Li Zhao Teng Zhang Hui Zhang |
| author_sort | Xiaofei Lou |
| collection | DOAJ |
| description | Abstract Silicon is considered as the most promising anode material for high performance lithium-ion batteries due to its high theoretical specific capacity and low working potential. However, severe volume expansion problems existing during the process of (de)intercalation which seriously hinders its commercial progress. Binder can firmly adhere silicon and conductive agent to the current collector to maintain the integrity of the electrode structure, thereby effectively alleviating the silicon volume expansion and realizing lithium-ion batteries with high electrochemical performance. In this paper, citric acid (CA) and carboxymethyl cellulose (CMC) are adopted to construct a covalently crosslinked CA@CMC binder by an easy-to-scale-up esterification treatment. The Si@CA@CMC-1 electrode material shows an impressive initial coulombic efficiency (ICE) at 82.1% and after 510 cycles at 0.5 A/g, its specific capacity is still higher than commercial graphite. The excellent electrochemical performance of Si@CA@CMC-1 can be attributed to the ester bonds formed among CA@CMC binder and silicon particles. Importantly, by decoupling in situ EIS combining XPS at different cycles, it can be further proved that the CA@CMC binder can tune the component of SEI which provide a new-route to optimize the performance of silicon. |
| first_indexed | 2024-03-11T12:42:38Z |
| format | Article |
| id | doaj.art-55294271d3f44f4fb9f4867918e0a801 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-11T12:42:38Z |
| publishDate | 2023-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-55294271d3f44f4fb9f4867918e0a8012023-11-05T12:12:54ZengNature PortfolioScientific Reports2045-23222023-10-0113111010.1038/s41598-023-45763-3Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteriesXiaofei Lou0Yuanyuan Zhang1Li Zhao2Teng Zhang3Hui Zhang4College of Mechatronic Engineering, North Minzu UniversityCollege of Pharmacy, Ningxia Medical UniversityCollege of Mechatronic Engineering, North Minzu UniversityCollege of Mechatronic Engineering, North Minzu UniversityState Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia UniversityAbstract Silicon is considered as the most promising anode material for high performance lithium-ion batteries due to its high theoretical specific capacity and low working potential. However, severe volume expansion problems existing during the process of (de)intercalation which seriously hinders its commercial progress. Binder can firmly adhere silicon and conductive agent to the current collector to maintain the integrity of the electrode structure, thereby effectively alleviating the silicon volume expansion and realizing lithium-ion batteries with high electrochemical performance. In this paper, citric acid (CA) and carboxymethyl cellulose (CMC) are adopted to construct a covalently crosslinked CA@CMC binder by an easy-to-scale-up esterification treatment. The Si@CA@CMC-1 electrode material shows an impressive initial coulombic efficiency (ICE) at 82.1% and after 510 cycles at 0.5 A/g, its specific capacity is still higher than commercial graphite. The excellent electrochemical performance of Si@CA@CMC-1 can be attributed to the ester bonds formed among CA@CMC binder and silicon particles. Importantly, by decoupling in situ EIS combining XPS at different cycles, it can be further proved that the CA@CMC binder can tune the component of SEI which provide a new-route to optimize the performance of silicon.https://doi.org/10.1038/s41598-023-45763-3 |
| spellingShingle | Xiaofei Lou Yuanyuan Zhang Li Zhao Teng Zhang Hui Zhang Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries Scientific Reports |
| title | Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| title_full | Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| title_fullStr | Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| title_full_unstemmed | Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| title_short | Cross-linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| title_sort | cross linked multifunctional binder in situ tuning solid electrolyte interface for silicon anodes in lithium ion batteries |
| url | https://doi.org/10.1038/s41598-023-45763-3 |
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