Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 5, Pages 2055-2060Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913351
Keywords
batteries; dendrite suppression; lithium anodes; polymers; supramolecular chemistry
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Funding
- National Natural Science Foundation of China [51874142, 21604025]
- Pearl River S&T Nova Program of Guangzhou [201806010031]
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06N569]
- Fundamental Research Funds for the Central Universities [2019JQ09]
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Constructing a solid electrolyte interface (SEI) is a highly effective approach to overcome the poor reversibility of lithium (Li) metal anodes. Herein, an adhesive and self-healable supramolecular copolymer, comprising of pendant poly(ethylene oxide) (PEO) segments and ureido-pyrimidinone (UPy) quadruple-hydrogen-bonding moieties, is developed as a protection layer of Li anode by a simple drop-coating. The protection performance of in-situ-formed LiPEO-UPy SEI layer is significantly enhanced owing to the strong binding and improved stability arising from a spontaneous reaction between UPy groups and Li metal. An ultrathin (approximately 70 nm) LiPEO-UPy layer can contribute to stable and dendrite-free cycling at a high areal capacity of 10 mAh cm(-2) at 5 mA cm(-2) for 1000 h. This coating together with the promising electrochemical performance offers a new strategy for the development of dendrite-free metal anodes.
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