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Hf-based UiO-66-type solid electrolytes for all-solid-state lithium batteries.
- Source :
-
New Journal of Chemistry . 5/14/2022, Vol. 46 Issue 18, p8779-8785. 7p. - Publication Year :
- 2022
-
Abstract
- Solid electrolytes (SEs) are expected to have a wide potential window, excellent stability, and high safety in electrochemical processes, allowing them to be applied flexibly in all-solid-state batteries (ASSBs). However, SEs suffer from low ionic conductivity and high interfacial impedance, which limits their practical application as key components of electrochemically stable batteries. Hf-based metal--organic frameworks modified by lithium ions (HLMOFs), consisting of functionalised UiO-66 MOFs with excellent electrochemical performances, have been synthesised and processed. The Li/UiO-66-2CO2Li (Li/HLMOF-4) electrolyte membrane shows excellent electrochemical performance, including high ionic conductivity (2.82 x 10-3 S cm-1), high transference number (0.58), and a wide potential window of 1.60--4.65 V at room temperature. The lithium stripping/plating behaviours can be stably cycled under a current density from 0.02 to 0.2 mA cm-2. The excellent electrochemical performances of the nanostructured Li/HLMOF-4 are attributed to an increase in protons on the carboxyl group in the crystal by post-synthesis modification, which could be exchanged with lithium ions. The fabricated Li8Li/HLMOF- 48LiFePO4 batteries exhibit high charge/discharge capacities. The chemical and structural design of the Hf-based SEs promotes their practical applications in next-generation solid-state batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 46
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 162500784
- Full Text :
- https://doi.org/10.1039/d2nj00090c