Tension‐Induced Cavitation in Li‐Metal Stripping
Name
Advanced Materials - 2022 - Wang - Tension‐Induced Cavitation in Li‐Metal Stripping.pdf
Description
Published version
Size
2.58 MB
Format
Adobe PDF
Checksum (MD5)
dc7e3f5928205de442af4eaa45480d18
Author(s)
Wang, Chunyang
Lin, Ruoqian
He, Yubin
Zou, Peichao
Kisslinger, Kim
He, Qi
Li, Ju
Xin, Huolin L
Date Issued
November 22, 2022
Journal
Advanced Materials
Publisher
Wiley
Citation
Wang, Chunyang, Lin, Ruoqian, He, Yubin, Zou, Peichao, Kisslinger, Kim et al. 2022. "Tension‐Induced Cavitation in Li‐Metal Stripping." Advanced Materials.
Version
Final published version
Abstract
Designing stable Li metal and supporting solid structures (SSS) is of fundamental importance in rechargeable Li-metal batteries. Yet, the stripping kinetics of Li metal and its mechanical effect on the supporting solids (including solid electrolyte interface) remain mysterious to date. Here, through nanoscale in situ observations of a solid-state Li-metal battery in an electron microscope, two distinct cavitation-mediated Li stripping modes controlled by the ratio of the SSS thickness (t) to the Li deposit's radius (r) are discovered. A quantitative criterion is established to understand the damage tolerance of SSS on the Li-metal stripping pathways. For mechanically unstable SSS (t/r < 0.21), the stripping proceeds via tension-induced multisite cavitation accompanied by severe SSS buckling and necking, ultimately leading to Li "trapping" or "dead Li" formation; for mechanically stable SSS (t/r > 0.21), the Li metal undergoes nearly planar stripping from the root via single cavitation, showing negligible buckling. This work proves the existence of an electronically conductive precursor film coated on the interior of solid electrolytes that however can be mechanically damaged, and it is of potential importance to the design of delicate Li-metal supporting structures to high-performance solid-state Li-metal batteries.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1002/adma.202209091
