气候变化领域集成服务门户(CCPortal): Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures

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DOI	10.1073/pnas.2004576117
	Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures
	Zhao Q.; Liu X.; Zheng J.; Deng Y.; Warren A.; Zhang Q.; Archer L.
发表日期	2020
ISSN	0027-8424
起始页码	26053
结束页码	26060
卷号	117 期号:42
英文摘要	In the presence of Lewis acid salts, the cyclic ether, dioxolane (DOL), is known to undergo ring-opening polymerization inside electrochemical cells to form solid-state polymer batteries with good interfacial charge-transport properties. Here we report that LiNO3, which is unable to ring-open DOL, possesses a previously unknown ability to coordinate with and strain DOL molecules in bulk liquids, completely arresting their crystallization. The strained DOL electrolytes exhibit physical properties analogous to amorphous polymers, including a prominent glass transition, elevated moduli, and low activation entropy for ion transport, but manifest unusually high, liquidlike ionic conductivities (e.g., 1 mS/cm) at temperatures as low as -50 °C. Systematic electrochemical studies reveal that the electrolytes also promote reversible cycling of Li metal anodes with high Coulombic efficiency (CE) on both conventional planar substrates (1 mAh/cm2 over 1,000 cycles with 99.1% CE; 3 mAh/cm2over 300 cycles with 99.2% CE) and unconventional, nonplanar/three-dimensional (3D) substrates (10 mAh/cm2over 100 cycles with 99.3% CE). Our finding that LiNO3promotes reversibility of Li metal electrodes in liquid DOL electrolytes by a physical mechanism provides a possible solution to a longstanding puzzle in the field about the versatility of LiNO3salt additives for enhancing reversibility of Li metal electrodes in essentially any aprotic liquid electrolyte solvent. As a first step toward understanding practical benefits of these findings, we create functional Lijjlithium iron phosphate (LFP) batteries in which LFP cathodes with high capacity (5 to 10 mAh/cm2) are paired with thin (50 μm) lithium metal anodes, and investigate their galvanostatic electrochemical cycling behaviors. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Coupled dynamics; Electrolytes; Ion transport; Lithium batteries; Thermal transition
语种	英语
scopus关键词	electrolyte; lithium; lithium nitrate; polymer; solvent; unclassified drug; Article; conductance; controlled study; crystallization; dynamics; electrochemical analysis; ion transport; low temperature; priority journal; thermal analysis
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160207
作者单位	Zhao, Q., Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, United States; Liu, X., Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, United States; Zheng, J., Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, United States; Deng, Y., Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, United States; Warren, A., Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, United States; Zhang, Q., Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, United States; Archer, L., Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, United States, Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, United States
推荐引用方式 GB/T 7714	Zhao Q.,Liu X.,Zheng J.,et al. Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures[J],2020,117(42).
APA	Zhao Q..,Liu X..,Zheng J..,Deng Y..,Warren A..,...&Archer L..(2020).Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures.Proceedings of the National Academy of Sciences of the United States of America,117(42).
MLA	Zhao Q.,et al."Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures".Proceedings of the National Academy of Sciences of the United States of America 117.42(2020).