globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2004576117
论文题名:
Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures
作者: Zhao Q.; Liu X.; Zheng J.; Deng Y.; Warren A.; Zhang Q.; Archer L.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:42
起始页码: 26053
结束页码: 26060
语种: 英语
英文关键词: Coupled dynamics ; Electrolytes ; Ion transport ; Lithium batteries ; Thermal transition
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
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.
Citation statistics:
被引频次[WOS]:73   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163377
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
Zhao Q.,Liu X.,Zheng J.,et al. Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(42)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhao Q.]'s Articles
[Liu X.]'s Articles
[Zheng J.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zhao Q.]'s Articles
[Liu X.]'s Articles
[Zheng J.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhao Q.]‘s Articles
[Liu X.]‘s Articles
[Zheng J.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.