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Solvent-Free, Single Lithium-Ion Conducting Covalent Organic Frameworks
- Source :
- Journal of the American Chemical Society; April 2019, Vol. 141 Issue: 14 p5880-5885, 6p
- Publication Year :
- 2019
-
Abstract
- Porous crystalline materials such as covalent organic frameworks and metal–organic frameworks have garnered considerable attention as promising ion conducting media. However, most of them additionally incorporate lithium salts and/or solvents inside the pores of frameworks, thus failing to realize solid-state single lithium-ion conduction behavior. Herein, we demonstrate a lithium sulfonated covalent organic framework (denoted as TpPa-SO3Li) as a new class of solvent-free, single lithium-ion conductors. Benefiting from well-designed directional ion channels, a high number density of lithium-ions, and covalently tethered anion groups, TpPa-SO3Liexhibits an ionic conductivity of 2.7 × 10–5S cm–1with a lithium-ion transference number of 0.9 at room temperature and an activation energy of 0.18 eV without additionally incorporating lithium salts and organic solvents. Such unusual ion transport phenomena of TpPa-SO3Liallow reversible and stable lithium plating/stripping on lithium metal electrodes, demonstrating its potential use for lithium metal electrodes.
Details
- Language :
- English
- ISSN :
- 00027863 and 15205126
- Volume :
- 141
- Issue :
- 14
- Database :
- Supplemental Index
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Periodical
- Accession number :
- ejs49605977
- Full Text :
- https://doi.org/10.1021/jacs.9b00543