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

Wang, Yikai; Dang, Dingying; Wang, Ming; Xiao, Xingcheng; Cheng, Yang-Tse

doi:10.1063/1.5111150

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

Journal Article · 22 July 2019 · Applied Physics Letters

DOI: https://doi.org/10.1063/1.5111150 · OSTI ID:1545061

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Univ. of Kentucky, Lexington, KY (United States). Dept. of Chemical and Materials Engineering; University of Kentucky
Univ. of Kentucky, Lexington, KY (United States). Dept. of Chemical and Materials Engineering
General Motors Global Research and Development Center, Warren, MI (United States)

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.

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Research Organization:: Univ. of Kentucky, Lexington, KY (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

Grant/Contract Number:: EE0007787

OSTI ID:: 1545061

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 4 Vol. 115; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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