Tension‐Induced Cavitation in Li‐Metal Stripping
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 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 16, 2022
- Source ID
- 10.1002/adma.202209091
Entities
People
- Chunyang Wang
- Huolin L. Xin
- Ju Li
- Kim Kisslinger
- Peichao Zou
- Qi He
- Ruoqian Lin
- Yubin He
Organizations
- Brookhaven National Laboratory
- Defense Advanced Research Projects Agency
- Massachusetts Institute of Technology
- National Science Foundation
- Office of Basic Energy Sciences
- Office of Science
- United States Department of Energy
- University of California