An Ultralow-concentration and Moisture-resistant Electrolyte of Lithium Difluoro(oxalato)borate in Carbonate Solvents for Stable Cycling in Practical Lithium-ion Batteries
© 2024 Wiley‐VCH GmbH..
The electrolyte concentration not only impacts the battery performance but also affects the battery cost and manufacturing. Currently, most studies focus on high-concentration (>3 M) or localized high-concentration electrolytes (~1 M); however, the expensive lithium salt imposes a major concern. Most recently, ultralow concentration electrolytes (<0.3 M) have emerged as intriguing alternatives for battery applications, which feature low cost, low viscosity, and extreme-temperature operation. However, at such an early development stage, many works are urgently needed to further understand the electrolyte properties. Herein, we introduce an ultralow concentration electrolyte of 2 wt % (0.16 M) lithium difluoro(oxalato)borate (LiDFOB) in standard carbonate solvents. This electrolyte exhibits a record-low salt/solvent mass ratio reported to date, thus pointing to a superior low cost. Furthermore, this electrolyte is highly compatible with commercial Li-ion materials, forming stable and inorganic-rich interphases on the lithium cobalt oxide (LiCoO2) cathode and graphite anode. Consequently, the LiCoO2-graphite full cell demonstrates excellent cycling performance. Besides, this electrolyte is moisture-resistant and effectively suppresses the generation of hydrogen fluoride, which will markedly facilitate the battery assembly and recycling process under ambient conditions.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:63 |
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| Enthalten in: |
Angewandte Chemie (International ed. in English) - 63(2024), 19 vom: 06. Apr., Seite e202400110 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Zhishan [VerfasserIn] |
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| Links: |
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| Themen: |
Electrode-Electrolyte Interphase |
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| Anmerkungen: |
Date Revised 25.04.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/anie.202400110 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 245 | 1 | 3 | |a An Ultralow-concentration and Moisture-resistant Electrolyte of Lithium Difluoro(oxalato)borate in Carbonate Solvents for Stable Cycling in Practical Lithium-ion Batteries |
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| 520 | |a © 2024 Wiley‐VCH GmbH. | ||
| 520 | |a The electrolyte concentration not only impacts the battery performance but also affects the battery cost and manufacturing. Currently, most studies focus on high-concentration (>3 M) or localized high-concentration electrolytes (~1 M); however, the expensive lithium salt imposes a major concern. Most recently, ultralow concentration electrolytes (<0.3 M) have emerged as intriguing alternatives for battery applications, which feature low cost, low viscosity, and extreme-temperature operation. However, at such an early development stage, many works are urgently needed to further understand the electrolyte properties. Herein, we introduce an ultralow concentration electrolyte of 2 wt % (0.16 M) lithium difluoro(oxalato)borate (LiDFOB) in standard carbonate solvents. This electrolyte exhibits a record-low salt/solvent mass ratio reported to date, thus pointing to a superior low cost. Furthermore, this electrolyte is highly compatible with commercial Li-ion materials, forming stable and inorganic-rich interphases on the lithium cobalt oxide (LiCoO2) cathode and graphite anode. Consequently, the LiCoO2-graphite full cell demonstrates excellent cycling performance. Besides, this electrolyte is moisture-resistant and effectively suppresses the generation of hydrogen fluoride, which will markedly facilitate the battery assembly and recycling process under ambient conditions | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Electrode-Electrolyte Interphase | |
| 650 | 4 | |a Lithium Difluoro(oxalato)borate Salt | |
| 650 | 4 | |a Lithium-Ion Battery | |
| 650 | 4 | |a Low-Concentration Electrolyte | |
| 650 | 4 | |a Solvation Structure | |
| 700 | 1 | |a Hou, Wentao |e verfasserin |4 aut | |
| 700 | 1 | |a Tian, Haoran |e verfasserin |4 aut | |
| 700 | 1 | |a Qiu, Qian |e verfasserin |4 aut | |
| 700 | 1 | |a Ullah, Irfan |e verfasserin |4 aut | |
| 700 | 1 | |a Qiu, Shen |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Wei |e verfasserin |4 aut | |
| 700 | 1 | |a Yu, Qian |e verfasserin |4 aut | |
| 700 | 1 | |a Yuan, Jinliang |e verfasserin |4 aut | |
| 700 | 1 | |a Xia, Lan |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Xianyong |e verfasserin |4 aut | |
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