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Tension-Induced Cavitation in Li-Metal Stripping.
Wang, Chunyang; Lin, Ruoqian; He, Yubin; Zou, Peichao; Kisslinger, Kim; He, Qi; Li, Ju; Xin, Huolin L.
Afiliação
  • Wang C; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA.
  • Lin R; Chemistry Division, Brookhaven National Laboratory, Upton, NY, 11973, USA.
  • He Y; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA.
  • Zou P; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA.
  • Kisslinger K; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA.
  • He Q; Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Li J; Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Xin HL; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Adv Mater ; 35(7): e2209091, 2023 Feb.
Article em En | MEDLINE | ID: mdl-36413142
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Adv Mater Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Estados Unidos