Salt-in-Salt Reinforced Carbonate Electrolyte for Li Metal Batteries
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH..
The instability of carbonate electrolyte with metallic Li greatly limits its application in high-voltage Li metal batteries. Here, a "salt-in-salt" strategy is applied to boost the LiNO3 solubility in the carbonate electrolyte with Mg(TFSI)2 carrier, which enables the inorganic-rich solid electrolyte interphase (SEI) for excellent Li metal anode performance and also maintains the cathode stability. In the designed electrolyte, both NO3 - and PF6 - anions participate in the Li+ -solvent complexes, thus promoting the formation of inorganic-rich SEI. Our designed electrolyte has achieved a superior Li CE of 99.7 %, enabling the high-loading NCM811||Li (4.5 mAh cm-2 ) full cell with N/P ratio of 1.92 to achieve 84.6 % capacity retention after 200 cycles. The enhancement of LiNO3 solubility by divalent salts is universal, which will also inspire the electrolyte design for other metal batteries.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:61 |
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| Enthalten in: |
Angewandte Chemie (International ed. in English) - 61(2022), 43 vom: 24. Okt., Seite e202210522 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Sufu [VerfasserIn] |
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| Links: |
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| Themen: |
Carbonate Electrolyte |
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| Anmerkungen: |
Date Revised 10.01.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/anie.202210522 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. | ||
| 520 | |a The instability of carbonate electrolyte with metallic Li greatly limits its application in high-voltage Li metal batteries. Here, a "salt-in-salt" strategy is applied to boost the LiNO3 solubility in the carbonate electrolyte with Mg(TFSI)2 carrier, which enables the inorganic-rich solid electrolyte interphase (SEI) for excellent Li metal anode performance and also maintains the cathode stability. In the designed electrolyte, both NO3 - and PF6 - anions participate in the Li+ -solvent complexes, thus promoting the formation of inorganic-rich SEI. Our designed electrolyte has achieved a superior Li CE of 99.7 %, enabling the high-loading NCM811||Li (4.5 mAh cm-2 ) full cell with N/P ratio of 1.92 to achieve 84.6 % capacity retention after 200 cycles. The enhancement of LiNO3 solubility by divalent salts is universal, which will also inspire the electrolyte design for other metal batteries | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Carbonate Electrolyte | |
| 650 | 4 | |a Dendrite-Free | |
| 650 | 4 | |a Inorganic Interphase | |
| 650 | 4 | |a Lithium Metal Batteries | |
| 650 | 4 | |a Salt in Salt | |
| 700 | 1 | |a Xia, Jiale |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Weiran |e verfasserin |4 aut | |
| 700 | 1 | |a Wan, Hongli |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jiaxun |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Jijian |e verfasserin |4 aut | |
| 700 | 1 | |a Rao, Jiancun |e verfasserin |4 aut | |
| 700 | 1 | |a Deng, Tao |e verfasserin |4 aut | |
| 700 | 1 | |a Hou, Singyuk |e verfasserin |4 aut | |
| 700 | 1 | |a Nan, Bo |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Chunsheng |e verfasserin |4 aut | |
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