Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 18, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202116586
Keywords
Artificial Interphase; Covalent Organic Framework; Dendrite-Free Anode; Electrochemistry; Lithium-Metal Batteries
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-SC0005397]
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In this study, a thin covalent organic framework layer was used to suppress Li dendrite growth and mitigate side reactions on the Li anode. The COF-Li exhibited a non-dendrite morphology and demonstrated remarkable cycle life at high current density and areal capacity.
Lithium (Li) metal shows great potential for achieving high-energy-density rechargeable batteries. However, the practical applications of Li-metal batteries are still challenged by the formation of Li dendrites and unstable solid-electrolyte interphase (SEI) on metallic Li. Herein, a thin covalent organic framework layer is in situ fabricated on Li (COF-Li) to suppress Li dendrite growth and mitigate the side reaction on the Li anode. The COF has a periodic and uniform porosity, allowing for selectively sieving Li ions and guiding a uniform Li deposition. As a result, the COF-Li exhibits a non-dendrite morphology during repeated Li plating/stripping and demonstrates a remarkable cycle life over 13 200 h with an extremely low overpotential of only 16 mV at a high current density of 10 mA cm(-2) and a high areal capacity of 10 mAh cm(-2).
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