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High-Rate Cycling of Lithium-Metal Batteries Enabled by Dual-Salt Electrolyte-Assisted Micropatterned Interfaces

Title
High-Rate Cycling of Lithium-Metal Batteries Enabled by Dual-Salt Electrolyte-Assisted Micropatterned Interfaces
Author(s)
Yoon, ByeolheePark, JinkyuLee, JinhonKim, SeokwooRen, XiaodiLee, Yong MinKim, Hee-TakLee, HongkyungRyou, Myung-Hyun
Issued Date
2019-09
Citation
ACS Applied Materials & Interfaces, v.11, no.35, pp.31777 - 31785
Type
Article
Author Keywords
dual-salt electrolytefast-charginglithium dendritelithium metal batterymicropatterning
Keywords
DENDRITE-FREEION BATTERIESPERFORMANCECOMPOSITELIQUIDDEPOSITIONINTERLAYERSTABILITYANODESMATRIX
ISSN
1944-8244
Abstract
We present a synergistic strategy to boost the cycling performance of Li-metal batteries. The strategy is based on the combined use of a micropattern (MP) on the surface of the Li-metal electrode and an advanced dual-salt electrolyte (DSE) system to more efficiently control undesired Li-metal deposition at higher current density (â¼3 mA cm-2). The MP-Li electrode induces a spatially uniform current distribution to achieve dendrite-free Li-metal deposition beneath the surface layer formed by the DSE. The MP-Li/DSE combination exhibited excellent synergistic rate capability improvements that were neither observed with the MP-Li system nor for the bare Li/DSE system. The combination also resulted in the Li||LiMn2O4 battery attaining over 1※000 cycles, which is twice as long at the same capacity retention (80%) compared with the control cells (MP-Li without DSE). We further demonstrated extremely fast charging at a rate of 15 C (19.5 mA cm-2). © 2019 American Chemical Society
URI
http://hdl.handle.net/20.500.11750/10804
DOI
10.1021/acsami.9b05492
Publisher
American Chemical Society
Related Researcher
  • 이용민 Lee, Yong Min 에너지공학과
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
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Appears in Collections:
Department of Energy Science and Engineering Electrochemical Materials & Devices Laboratory 1. Journal Articles
Department of Energy Science and Engineering Battery Materials & Systems LAB 1. Journal Articles

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