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Jiang HZ, Yang C, Chen M, Liu XW, Yin LM, You Y, Lu J. Electrophilically Trapping Water for Preventing Polymerization of Cyclic Ether Towards Low-Temperature Li Metal Battery. Angew Chem Int Ed Engl 2023; 62:e202300238. [PMID: 36752412 DOI: 10.1002/anie.202300238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/04/2023] [Accepted: 02/08/2023] [Indexed: 02/09/2023]
Abstract
Cyclic ether, such as 1,3-dioxolane (DOL), are promising solvent for low-temperature electrolytes because of the low freezing point. Their use in electrolytes, however, is severely limited since it easily polymerizes in the presence of lithium inorganic salts. The trace water plays a key role via providing the source (proton) for chain initiation, which has, unfortunately, been neglected in most cases. In this work, we present an electrophile, trimethylsilyl isocyanate (Si-NCO), as the water scavenger, which eliminates moisture by a nucleophilic addition reaction. Si-NCO allows DOL to maintain liquid over a wide temperature range even in high-concentration electrolyte. Electrolyte with Si-NCO additive shows promising low-temperature performance. Our finding expands the use of cyclic ether solvents in the presence of inorganic salts and highlights a large space for unexplored design of water scavenger with electrophilic feature for low-temperature electrolytes.
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Affiliation(s)
- Hai-Zhen Jiang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, China
| | - Chao Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, China
| | - Min Chen
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Hubei, Wuhan, 430070, P. R. China
| | - Xiao-Wei Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, China
| | - Lu-Ming Yin
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, China
| | - Ya You
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan, 430070, China.,International School of Materials Science and Engineering, School of Materials Science and Microelectronics, Wuhan University of Technology, Hubei, Wuhan, 430070, P. R. China
| | - Jun Lu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, China
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Pasinszki T. Quantum-chemical study of the structure and stability of pseudohalogens: OCN–NCO and its isomers. Phys Chem Chem Phys 2008; 10:1411-8. [DOI: 10.1039/b713832f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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