Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes
Abstract MXene has been found as a good host for lithium (Li) metal anodes because of its high specific surface area, lithiophilicity, good stability with lithium, and the in situ formed LiF protective layer. However, the formation of Li dendrites and dead Li is inevitable during long‐term cycle due...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202103930 |
| _version_ | 1818332670098145280 |
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| author | Feifei Zhao Pengbo Zhai Yi Wei Zhilin Yang Qian Chen Jinghan Zuo Xiaokang Gu Yongji Gong |
| author_facet | Feifei Zhao Pengbo Zhai Yi Wei Zhilin Yang Qian Chen Jinghan Zuo Xiaokang Gu Yongji Gong |
| author_sort | Feifei Zhao |
| collection | DOAJ |
| description | Abstract MXene has been found as a good host for lithium (Li) metal anodes because of its high specific surface area, lithiophilicity, good stability with lithium, and the in situ formed LiF protective layer. However, the formation of Li dendrites and dead Li is inevitable during long‐term cycle due to the lack of protection at the Li/electrolyte interface. Herein, a stable artificial solid electrolyte interface (SEI) is constructed on the MXene surface by using insulating g‐C3N4 layer to regulate homogeneous Li plating/stripping. The 2D/2D MXene/g‐C3N4 composite nanosheets can not only guarantee sufficient lithiophilic sites, but also protect the Li metal from continuous corrosion by electrolytes. Thus, the Ti3C2Tx/g‐C3N4 electrode enables conformal Li deposition, enhanced average Coulombic efficiency (CE) of 98.4%, and longer cycle lifespan over 400 cycles with an areal capacity of 1.0 mAh cm−2 at 0.5 mA cm−2. Full cells paired with LiFePO4 (LFP) cathode also achieve enhanced rate capacity and cycling stability with higher capacity retention of 85.5% after 320 cycles at 0.5C. The advantages of the 2D/2D lithiophilic layer/artificial SEI layer heterostructures provide important insights into the design strategies for high‐performance and stable Li metal batteries. |
| first_indexed | 2024-12-13T13:39:26Z |
| format | Article |
| id | doaj.art-6395e02f7a424be999e2b2ab8b8370bf |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-13T13:39:26Z |
| publishDate | 2022-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-6395e02f7a424be999e2b2ab8b8370bf2022-12-21T23:43:37ZengWileyAdvanced Science2198-38442022-02-0196n/an/a10.1002/advs.202103930Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal AnodesFeifei Zhao0Pengbo Zhai1Yi Wei2Zhilin Yang3Qian Chen4Jinghan Zuo5Xiaokang Gu6Yongji Gong7School of Materials Science and Engineering Beihang University Beijing 100191 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaBeijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical Technology Beijing 100029 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaSchool of Materials Science and Engineering Beihang University Beijing 100191 ChinaAbstract MXene has been found as a good host for lithium (Li) metal anodes because of its high specific surface area, lithiophilicity, good stability with lithium, and the in situ formed LiF protective layer. However, the formation of Li dendrites and dead Li is inevitable during long‐term cycle due to the lack of protection at the Li/electrolyte interface. Herein, a stable artificial solid electrolyte interface (SEI) is constructed on the MXene surface by using insulating g‐C3N4 layer to regulate homogeneous Li plating/stripping. The 2D/2D MXene/g‐C3N4 composite nanosheets can not only guarantee sufficient lithiophilic sites, but also protect the Li metal from continuous corrosion by electrolytes. Thus, the Ti3C2Tx/g‐C3N4 electrode enables conformal Li deposition, enhanced average Coulombic efficiency (CE) of 98.4%, and longer cycle lifespan over 400 cycles with an areal capacity of 1.0 mAh cm−2 at 0.5 mA cm−2. Full cells paired with LiFePO4 (LFP) cathode also achieve enhanced rate capacity and cycling stability with higher capacity retention of 85.5% after 320 cycles at 0.5C. The advantages of the 2D/2D lithiophilic layer/artificial SEI layer heterostructures provide important insights into the design strategies for high‐performance and stable Li metal batteries.https://doi.org/10.1002/advs.202103930artificial solid electrolyte interfacesdendrite‐free Li metal anodesLi metal batterieslithiophilicityMXene |
| spellingShingle | Feifei Zhao Pengbo Zhai Yi Wei Zhilin Yang Qian Chen Jinghan Zuo Xiaokang Gu Yongji Gong Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes Advanced Science artificial solid electrolyte interfaces dendrite‐free Li metal anodes Li metal batteries lithiophilicity MXene |
| title | Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes |
| title_full | Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes |
| title_fullStr | Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes |
| title_full_unstemmed | Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes |
| title_short | Constructing Artificial SEI Layer on Lithiophilic MXene Surface for High‐Performance Lithium Metal Anodes |
| title_sort | constructing artificial sei layer on lithiophilic mxene surface for high performance lithium metal anodes |
| topic | artificial solid electrolyte interfaces dendrite‐free Li metal anodes Li metal batteries lithiophilicity MXene |
| url | https://doi.org/10.1002/advs.202103930 |
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