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Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries

Max Feinauer, Holger Euchner, Maximilian Fichtner, M. Anji Reddy, Anji Munnangi Orcid Logo

ACS Applied Energy Materials

Swansea University Author: Anji Munnangi Orcid Logo

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DOI (Published version): 10.1021/acsaem.9b01166

Abstract

The development of high energy density and sustainable all-solid-state lithium batteries relies on the development of suitable Li+ transporting solid electrolytes with high chemical and electrochemical stability, good interfacial compatibility, and high ionic conductivity. Ceramic-based electrolytes...

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Published in: ACS Applied Energy Materials
ISSN: 2574-0962 2574-0962
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51762
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first_indexed 2019-09-10T15:31:36Z
last_indexed 2021-12-02T04:06:32Z
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spelling 2021-12-01T13:30:36.8522860 v2 51762 2019-09-10 Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries 3ed0b4f2ff4fb9e87c7a73e7a3c39da7 0000-0001-9101-0252 Anji Munnangi Anji Munnangi true false 2019-09-10 MTLS The development of high energy density and sustainable all-solid-state lithium batteries relies on the development of suitable Li+ transporting solid electrolytes with high chemical and electrochemical stability, good interfacial compatibility, and high ionic conductivity. Ceramic-based electrolytes show high bulk Li+ conductivity and stability but exhibit poor mechanical properties. In contrast, few sulfide-based electrolytes show high total Li+ conductivity and better mechanical properties but poor chemical and electrochemical stability. Moreover, both types of electrolytes exhibit interfacial compatibility issues with several electrode materials. Here, we reveal the potential of Li-containing metal fluorides as Li+ conducting solid electrolytes for solid-state lithium batteries, demonstrating their viability with a case study on β-Li3AlF6. We have synthesized β-Li3AlF6 by mechanical milling and investigated its properties as a solid electrolyte. Ionic conductivity of 3.9x10-6 S cm-1 was observed at 100 °C, which was increased to 1.8x10-5 S cm-1 by compositing with nanocrystalline alumina (γ-Al2O3). Furthermore, the performance of β-Li3AlF6 as a solid electrolyte was successfully tested in an all-solid-state lithium battery using LiMn2O4 as cathode and Li metal as an anode. Finally, we have used density functional theory to shed light on the Li diffusion pathways and associated activation barriers in β-Li3AlF6. Overall, our studies reveal the hidden potential of Li-containing metal fluorides as solid electrolytes for all-solid-state lithium batteries. Journal Article ACS Applied Energy Materials 2574-0962 2574-0962 31 12 2019 2019-12-31 10.1021/acsaem.9b01166 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2021-12-01T13:30:36.8522860 2019-09-10T12:05:23.5808073 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Max Feinauer 1 Holger Euchner 2 Maximilian Fichtner 3 M. Anji Reddy 4 Anji Munnangi 0000-0001-9101-0252 5 0051762-10092019120846.pdf feinauer2019.pdf 2019-09-10T12:08:46.4570000 Output 1199311 application/pdf Accepted Manuscript true 2020-09-09T00:00:00.0000000 false eng
title Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
spellingShingle Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
Anji Munnangi
title_short Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
title_full Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
title_fullStr Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
title_full_unstemmed Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
title_sort Unlocking the Potential of Fluoride-based Solid Electrolytes for Solid-State Lithium Batteries
author_id_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7
author_id_fullname_str_mv 3ed0b4f2ff4fb9e87c7a73e7a3c39da7_***_Anji Munnangi
author Anji Munnangi
author2 Max Feinauer
Holger Euchner
Maximilian Fichtner
M. Anji Reddy
Anji Munnangi
format Journal article
container_title ACS Applied Energy Materials
publishDate 2019
institution Swansea University
issn 2574-0962
2574-0962
doi_str_mv 10.1021/acsaem.9b01166
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description The development of high energy density and sustainable all-solid-state lithium batteries relies on the development of suitable Li+ transporting solid electrolytes with high chemical and electrochemical stability, good interfacial compatibility, and high ionic conductivity. Ceramic-based electrolytes show high bulk Li+ conductivity and stability but exhibit poor mechanical properties. In contrast, few sulfide-based electrolytes show high total Li+ conductivity and better mechanical properties but poor chemical and electrochemical stability. Moreover, both types of electrolytes exhibit interfacial compatibility issues with several electrode materials. Here, we reveal the potential of Li-containing metal fluorides as Li+ conducting solid electrolytes for solid-state lithium batteries, demonstrating their viability with a case study on β-Li3AlF6. We have synthesized β-Li3AlF6 by mechanical milling and investigated its properties as a solid electrolyte. Ionic conductivity of 3.9x10-6 S cm-1 was observed at 100 °C, which was increased to 1.8x10-5 S cm-1 by compositing with nanocrystalline alumina (γ-Al2O3). Furthermore, the performance of β-Li3AlF6 as a solid electrolyte was successfully tested in an all-solid-state lithium battery using LiMn2O4 as cathode and Li metal as an anode. Finally, we have used density functional theory to shed light on the Li diffusion pathways and associated activation barriers in β-Li3AlF6. Overall, our studies reveal the hidden potential of Li-containing metal fluorides as solid electrolytes for all-solid-state lithium batteries.
published_date 2019-12-31T04:03:46Z
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score 11.01628

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