Design principles for self-forming interfaces enabling stable lithium-metal anodes
Name
Bucci_2021_J._Electrochem._Soc._168_054515.pdf
Description
Published version
Size
7.36 MB
Format
Adobe PDF
Checksum (MD5)
41ebfd3b7f45c912a248b5e09a04f940
Author(s)
Zhu, Yingying
Pande, Vikram
Li, Linsen
Wen, Bohua
Pan, Menghsuan Sam
Wang, David
Ma, Zi-Feng
Viswanathan, Venkatasubramanian
Chiang, Yet-Ming
Date Issued
2020
Journal
Proceedings of the National Academy of Sciences of the United States of America
Publisher
Proceedings of the National Academy of Sciences
Citation
Zhu, Yingying, Pande, Vikram, Li, Linsen, Wen, Bohua, Pan, Menghsuan Sam et al. 2020. "Design principles for self-forming interfaces enabling stable lithium-metal anodes." Proceedings of the National Academy of Sciences of the United States of America, 117 (44).
Version
Final published version
Abstract
© 2020 National Academy of Sciences. All rights reserved. The path toward Li-ion batteries with higher energy densities will likely involve use of thin lithium (Li)-metal anode (<50 μm thickness), whose cyclability today remains limited by dendrite formation and low coulombic efficiency (CE). Previous studies have shown that the solid–electrolyte interface (SEI) of the Li metal plays a crucial role in Li-electrodeposition and -stripping behavior. However, design rules for optimal SEIs are not well established. Here, using integrated experimental and modeling studies on a series of structurally similar SEI-modifying model compounds, we reveal the relationship between SEI compositions, Li deposition morphology, and CE and identify two key descriptors for the fraction of ionic compounds and compactness, leading to high-performance SEIs. We further demonstrate one of the longest cycle lives to date (350 cycles for 80% capacity retention) for a high specific-energy LijjLiCoO2 full cell (projected >350 watt hours [Wh]/kg) at practical current densities. Our results provide guidance for rational design of the SEI to further improve Li-metal anodes.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1073/PNAS.2001923117
