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Weakly coordinated Li ion in single-ion-conductor-based composite enabling low electrolyte content Li-metal batteries.
- Source :
- Nature Communications; 7/8/2023, Vol. 14 Issue 1, p1-11, 11p
- Publication Year :
- 2023
-
Abstract
- The pulverization of lithium metal electrodes during cycling recently has been suppressed through various techniques, but the issue of irreversible consumption of the electrolyte remains a critical challenge, hindering the progress of energy-dense lithium metal batteries. Here, we design a single-ion-conductor-based composite layer on the lithium metal electrode, which significantly reduces the liquid electrolyte loss via adjusting the solvation environment of moving Li<superscript>+</superscript> in the layer. A Li||Ni<subscript>0.5</subscript>Mn<subscript>0.3</subscript>Co<subscript>0.2</subscript>O<subscript>2</subscript> pouch cell with a thin lithium metal (N/P of 2.15), high loading cathode (21.5 mg cm<superscript>−2</superscript>), and carbonate electrolyte achieves 400 cycles at the electrolyte to capacity ratio of 2.15 g Ah<superscript>−1</superscript> (2.44 g Ah<superscript>−1</superscript> including mass of composite layer) or 100 cycles at 1.28 g Ah<superscript>−1</superscript> (1.57 g Ah<superscript>−1</superscript> including mass of composite layer) under a stack pressure of 280 kPa (0.2 C charge with a constant voltage charge at 4.3 V to 0.05 C and 1.0 C discharge within a voltage window of 4.3 V to 3.0 V). The rational design of the single-ion-conductor-based composite layer demonstrated in this work provides a way forward for constructing energy-dense rechargeable lithium metal batteries with minimal electrolyte content. The reactivity between lithium and a liquid electrolyte leads to degradation of a lithium metal battery, resulting in the depletion of the liquid electrolyte. Here, authors develop a composite layer that can mitigate the reactivity and consequently enable long-cycling lithium metal batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 164782515
- Full Text :
- https://doi.org/10.1038/s41467-023-39673-1