The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries
Abstract FeF3 conversion cathodes, paired with Li metal, are promising for use in next‐generation secondary batteries and offer a remarkable theoretical energy density of 1947 Wh kg−1 compared to 690 Wh kg−1 for LiNi0.5Mn1.5O4; however, many successful studies on FeF3 cathodes are performed in cells...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-04-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202105803 |
| _version_ | 1818523916989104128 |
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| author | Bryan R. Wygant Laura C. Merrill Katharine L. Harrison A. Alec Talin David S. Ashby Timothy N. Lambert |
| author_facet | Bryan R. Wygant Laura C. Merrill Katharine L. Harrison A. Alec Talin David S. Ashby Timothy N. Lambert |
| author_sort | Bryan R. Wygant |
| collection | DOAJ |
| description | Abstract FeF3 conversion cathodes, paired with Li metal, are promising for use in next‐generation secondary batteries and offer a remarkable theoretical energy density of 1947 Wh kg−1 compared to 690 Wh kg−1 for LiNi0.5Mn1.5O4; however, many successful studies on FeF3 cathodes are performed in cells with a large (>90‐fold) excess of Li that disguises the effects of tested variables on the anode and decreases the practical energy density of the battery. Herein, it is demonstrated that for full‐cell compatibility, the electrolyte must produce both a protective solid‐electrolyte interphase and cathode‐electrolyte interphase and that an electrolyte composed of 1:1.3:3 (m/m) LiFSI, 1,2‐dimethoxyethane, and 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether fulfills both these requirements. This work demonstrates the importance of verifying electrode level solutions on the full‐cell level when developing new battery chemistries and represents the first full cell demonstration of a Li/FeF3 cell, with both limited Li and high capacity FeF3 utilization. |
| first_indexed | 2024-12-11T05:50:42Z |
| format | Article |
| id | doaj.art-c30f97f2c958472791c0d2250c64accb |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-12-11T05:50:42Z |
| publishDate | 2022-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-c30f97f2c958472791c0d2250c64accb2022-12-22T01:18:49ZengWileyAdvanced Science2198-38442022-04-01912n/an/a10.1002/advs.202105803The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell BatteriesBryan R. Wygant0Laura C. Merrill1Katharine L. Harrison2A. Alec Talin3David S. Ashby4Timothy N. Lambert5Department of Photovoltaics and Materials Technology Sandia National Laboratories Albuquerque NM 87185 USADepartment of Nanoscale Sciences Sandia National Laboratories Albuquerque NM 87185 USADepartment of Nanoscale Sciences Sandia National Laboratories Albuquerque NM 87185 USADepartment of Quantum and Electronic Materials Sandia National Laboratories Livermore CA 94550 USADepartment of Quantum and Electronic Materials Sandia National Laboratories Livermore CA 94550 USADepartment of Photovoltaics and Materials Technology Sandia National Laboratories Albuquerque NM 87185 USAAbstract FeF3 conversion cathodes, paired with Li metal, are promising for use in next‐generation secondary batteries and offer a remarkable theoretical energy density of 1947 Wh kg−1 compared to 690 Wh kg−1 for LiNi0.5Mn1.5O4; however, many successful studies on FeF3 cathodes are performed in cells with a large (>90‐fold) excess of Li that disguises the effects of tested variables on the anode and decreases the practical energy density of the battery. Herein, it is demonstrated that for full‐cell compatibility, the electrolyte must produce both a protective solid‐electrolyte interphase and cathode‐electrolyte interphase and that an electrolyte composed of 1:1.3:3 (m/m) LiFSI, 1,2‐dimethoxyethane, and 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether fulfills both these requirements. This work demonstrates the importance of verifying electrode level solutions on the full‐cell level when developing new battery chemistries and represents the first full cell demonstration of a Li/FeF3 cell, with both limited Li and high capacity FeF3 utilization.https://doi.org/10.1002/advs.202105803conversion electrodeselectrolyte compatibilityiron fluoride cathodeLi metal anodeslithium batteries |
| spellingShingle | Bryan R. Wygant Laura C. Merrill Katharine L. Harrison A. Alec Talin David S. Ashby Timothy N. Lambert The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries Advanced Science conversion electrodes electrolyte compatibility iron fluoride cathode Li metal anodes lithium batteries |
| title | The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries |
| title_full | The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries |
| title_fullStr | The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries |
| title_full_unstemmed | The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries |
| title_short | The Role of Electrolyte Composition in Enabling Li Metal‐Iron Fluoride Full‐Cell Batteries |
| title_sort | role of electrolyte composition in enabling li metal iron fluoride full cell batteries |
| topic | conversion electrodes electrolyte compatibility iron fluoride cathode Li metal anodes lithium batteries |
| url | https://doi.org/10.1002/advs.202105803 |
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