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Garnet-Type Lithium Metal Fluorides: A Potential Solid Electrolyte for Solid-State Batteries
Ediga Umeshbabu 
,
Satyanarayana Maddukuri,
Doron Aurbach,
Maximilian Fichtner ,
Anji Munnangi
,
Satyanarayana Maddukuri,
Doron Aurbach,
Maximilian Fichtner ,
Anji Munnangi
ACS Applied Energy Materials, Volume: 6, Issue: 1, Pages: 51 - 57
Swansea University Author:
Anji Munnangi
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DOI (Published version): 10.1021/acsaem.2c03334
Abstract
In this work, we introduced a garnet-type lithium metal fluoride, Li3Na3M2F12 (M = Al, Sc, In), as solid-state lithium-ion conductors for the first time. The mechanically milled Li3Na3M2F12 compounds crystallized in a cubic garnet-like structure (Ia3̅d, No. 230). The ionic conductivities of Li3Na3Al...
| Published in: | ACS Applied Energy Materials |
|---|---|
| ISSN: | 2574-0962 2574-0962 |
| Published: |
American Chemical Society (ACS)
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa62308 |
| Abstract: |
In this work, we introduced a garnet-type lithium metal fluoride, Li3Na3M2F12 (M = Al, Sc, In), as solid-state lithium-ion conductors for the first time. The mechanically milled Li3Na3M2F12 compounds crystallized in a cubic garnet-like structure (Ia3̅d, No. 230). The ionic conductivities of Li3Na3Al2F12, Li3Na3Sc2F12, and Li3Na3In2F12 are 1.7 × 10–6, 8.2 × 10–6, and 2.4 × 10–6 S/cm at 300 °C and 1.2 × 10–10, 2.6 × 10–9, and 1.8 × 10–10 S/cm at 100 °C, respectively. Even though these fluoride garnets’ conductivity is less, it is still better than those of the oxide analogues Li3Ln3Te2O12 (Ln = Er, Gd, Tb, Nd). Moreover, we explored why garnet-type Li3Na3M2F12 has low ionic conductivity and presented strategies for further improving conductivities. |
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| Keywords: |
Garnet-type lithium metal fluorides; Solid electrolytes; XRD; Rietveld refinement; Ionic conductivity; Solid-state lithium batteries |
| College: |
Faculty of Science and Engineering |
| Funders: |
German Research Foundation under Project ID 01DQ19012A (SELBA) |
| Issue: |
1 |
| Start Page: |
51 |
| End Page: |
57 |