Projects per year
Abstract
Polymers are promising candidates as solid-state electrolytes due to their performance and processability, but fillers play a critical role in adjusting the polymer network structure and electrochemical, thermal, and mechanical properties. Most fillers studied so far are anisotropic, limiting the possibility of homogeneous ion transport. Here, applying metal-organic framework (MOF) glass as an isotropic functional filler, solid-state polyethylene oxide (PEO) electrolytes are prepared. Calorimetric and diffusion kinetics tests show that the MOF glass addition reduces the glass transition temperature of the polymer phase, improving the mobility of the polymer chains, and thereby facilitating lithium (Li) ion transport. By also incorporating the lithium salt and ionic liquid (IL), Li–Li symmetric cell tests of the PEO-lithium salt-MOF glass-IL electrolyte reveal low overpotential, indicating low interfacial impedance. Simulations show that the isotropic structure of the MOF glass facilitates the wettability of the IL by enhancing interfacial interactions, leading to a less confined IL structure that promotes Li-ion mobility. Finally, the obtained electrolyte is used to construct Li–lithium iron phosphate full batteries that feature high cycle stability and rate capability. This work therefore demonstrates how an isotropic functional filler can be used to enhance the electrochemical performance of solid-state polymer electrolytes.
Original language | English |
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Article number | 2306698 |
Journal | Advanced Science |
Volume | 11 |
Issue number | 10 |
DOIs | |
Publication status | Published - Mar 2024 |
Bibliographical note
© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.Keywords
- functional filler
- ionic liquid
- lithium metal batteries
- metal-organic framework glass
- solid-state polymer electrolyte
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Dive into the research topics of 'Metal-Organic Framework Glass as a Functional Filler Enables Enhanced Performance of Solid-State Polymer Electrolytes for Lithium Metal Batteries'. Together they form a unique fingerprint.Projects
- 2 Finished
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TOUGH: Toward Tough Amorphous Electrolytes and Stable Interfaces in Solid-State Batteries
Smedskjær, M. M. & Ding, J.
01/04/2022 → 31/03/2024
Project: Research
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ToughMOF: Tailoring Metal-Organic Framework Glasses with Higher Fracture Toughness
Smedskjær, M. M. & Du, T.
01/08/2021 → 31/07/2023
Project: Research