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Title: Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation

Abstract

We report the Young’s modulus and deformation behavior of electroplated mossy lithium at room temperature investigated by flat punch indentation inside an argon-filled glovebox. The Young’s modulus of the mossy lithium with a porosity of about 62.3 % is measured to be about 2 GPa, which is smaller than that (~7.8 GPa) of bulk Li. Both the mossy and bulk lithium show clearly indentation creep behavior. Despite its highly porous microstructure, the impression creep velocity of the mossy lithium is less than one-thirtieth of that of bulk lithium under the same stress. We proposed possible mechanisms for the significantly higher deformation and creep resistance of the mossy lithium over bulk lithium. These findings are key to developing mechanical suppression approaches to improve the cycling stability of lithium metal electrodes.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Univ. of Kentucky, Lexington, KY (United States). Dept. of Chemical and Materials Engineering
  2. General Motors Global Research and Development Center, Warren, MI (United States)
Publication Date:
Research Org.:
Univ. of Kentucky, Lexington, KY (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE
OSTI Identifier:
1545061
Alternate Identifier(s):
OSTI ID: 1545178
Grant/Contract Number:  
EE0007787
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; lithium metal electrode; indentation; mechanical properties; creep

Citation Formats

Wang, Yikai, Dang, Dingying, Wang, Ming, Xiao, Xingcheng, and Cheng, Yang-Tse. Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation. United States: N. p., 2019. Web. doi:10.1063/1.5111150.
Wang, Yikai, Dang, Dingying, Wang, Ming, Xiao, Xingcheng, & Cheng, Yang-Tse. Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation. United States. doi:10.1063/1.5111150.
Wang, Yikai, Dang, Dingying, Wang, Ming, Xiao, Xingcheng, and Cheng, Yang-Tse. Mon . "Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation". United States. doi:10.1063/1.5111150. https://www.osti.gov/servlets/purl/1545061.
@article{osti_1545061,
title = {Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation},
author = {Wang, Yikai and Dang, Dingying and Wang, Ming and Xiao, Xingcheng and Cheng, Yang-Tse},
abstractNote = {We report the Young’s modulus and deformation behavior of electroplated mossy lithium at room temperature investigated by flat punch indentation inside an argon-filled glovebox. The Young’s modulus of the mossy lithium with a porosity of about 62.3 % is measured to be about 2 GPa, which is smaller than that (~7.8 GPa) of bulk Li. Both the mossy and bulk lithium show clearly indentation creep behavior. Despite its highly porous microstructure, the impression creep velocity of the mossy lithium is less than one-thirtieth of that of bulk lithium under the same stress. We proposed possible mechanisms for the significantly higher deformation and creep resistance of the mossy lithium over bulk lithium. These findings are key to developing mechanical suppression approaches to improve the cycling stability of lithium metal electrodes.},
doi = {10.1063/1.5111150},
journal = {Applied Physics Letters},
number = 4,
volume = 115,
place = {United States},
year = {2019},
month = {7}
}

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Cited by: 7 works
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