Formation, Growth, and Shrinkage of Voids in Lithium Metal in Contact With an LLZO Electrolyte.

ABSTRACT: A leap forward in the energy density of solid-state batteries necessitates the successful implementation of metal electrodes. A serious problem of metal electrodes is their nonuniform deposition and dissolution, which can lead to dendrites and voids. Here, we report on formation, growth, and shrinkage of voids based on operando SEM observations of lithium metal in contact with a Li₇La₃Zr₂O₁₂ (LLZO) electrolyte. Our observations reveal a general tendency for the replenishment of voids upon redeposition of lithium. We explain this by gradients in the mechanical stress that act as driving forces for atom motion inside the electrode and thus feed lithium away from the interface back into existing voids, which restore the original shape of the

SUBMITTER: Lang S 

PROVIDER: S-EPMC12532089 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature