Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation
Prelithiation has been widely accepted as one of the most promising strategies to compensate for the loss of active substance and to improve the initial Coulombic efficiency in silicon-based anodes for advanced high-energy-density batteries. But because of their unstable solid electrolyte interface...
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MDPI AG
2025-05-01
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| author | Bo Peng Weizhai Bao Kaiwen Sun Jin Xiao |
| author_facet | Bo Peng Weizhai Bao Kaiwen Sun Jin Xiao |
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| description | Prelithiation has been widely accepted as one of the most promising strategies to compensate for the loss of active substance and to improve the initial Coulombic efficiency in silicon-based anodes for advanced high-energy-density batteries. But because of their unstable solid electrolyte interface (SEI) layer and low initial Coulombic efficiency, they expand in volume during prelithiation and react with moisture, which makes commercialization a difficult process. Herein, we have developed a strategy using lithium bis(fluorosulfonyl)imide (LiFSI) treatment to eliminate redundant lithium and generate LiF-based inorganic compounds on the surface of the prelithiated electrode. Such method not only reduces the reactiveness of the prelithiated anode but also enhances the ionic conductivity of the SEI. The rich LiF surface works as an artificial SEI, and according to electrochemical evaluation, the initial Coulombic efficiency of the prelithiated silicon anode treated with LiFSI can reach 92.9%. This technique not only increases the battery’s energy density but also its cycle stability, resulting in superior capacity retention and a longer cycling life. |
| format | Article |
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| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-05-01 |
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| series | Nanomaterials |
| spelling | doaj-art-e7503fa2c95947d2a2cf319f54c7c2382025-08-20T03:49:22ZengMDPI AGNanomaterials2079-49912025-05-0115969010.3390/nano15090690Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and PrelithiationBo Peng0Weizhai Bao1Kaiwen Sun2Jin Xiao3School of Metallurgy and Environment, Central South University, Changsha 410083, ChinaSchool of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaAustralian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Kensington, NSW 2052, AustraliaSchool of Metallurgy and Environment, Central South University, Changsha 410083, ChinaPrelithiation has been widely accepted as one of the most promising strategies to compensate for the loss of active substance and to improve the initial Coulombic efficiency in silicon-based anodes for advanced high-energy-density batteries. But because of their unstable solid electrolyte interface (SEI) layer and low initial Coulombic efficiency, they expand in volume during prelithiation and react with moisture, which makes commercialization a difficult process. Herein, we have developed a strategy using lithium bis(fluorosulfonyl)imide (LiFSI) treatment to eliminate redundant lithium and generate LiF-based inorganic compounds on the surface of the prelithiated electrode. Such method not only reduces the reactiveness of the prelithiated anode but also enhances the ionic conductivity of the SEI. The rich LiF surface works as an artificial SEI, and according to electrochemical evaluation, the initial Coulombic efficiency of the prelithiated silicon anode treated with LiFSI can reach 92.9%. This technique not only increases the battery’s energy density but also its cycle stability, resulting in superior capacity retention and a longer cycling life.https://www.mdpi.com/2079-4991/15/9/690prelithiationartificial SEI layerinterfacial engineeringcoulombic efficiencysilicon anode |
| spellingShingle | Bo Peng Weizhai Bao Kaiwen Sun Jin Xiao Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation Nanomaterials prelithiation artificial SEI layer interfacial engineering coulombic efficiency silicon anode |
| title | Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation |
| title_full | Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation |
| title_fullStr | Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation |
| title_full_unstemmed | Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation |
| title_short | Enhancing Silicon Anode Performance in Lithium-Ion Batteries Through Hybrid Artificial SEI Layer and Prelithiation |
| title_sort | enhancing silicon anode performance in lithium ion batteries through hybrid artificial sei layer and prelithiation |
| topic | prelithiation artificial SEI layer interfacial engineering coulombic efficiency silicon anode |
| url | https://www.mdpi.com/2079-4991/15/9/690 |
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