Inelastic Deformation Mechanisms in Ceramic and Glass Electrolytes & Dendrites

Abstract

Ceramic and glass electrolytes are a promising replacement for the liquid electrolytes that are commonly used in Li-ion batteries. Their mechanical properties are known to play a critical role not only in practical issues related to safe cell assembly, but also in the battery cell performance. In this talk, inelastic deformation mechanisms in ceramic and sulfide glass electrolytes will be presented and their implication in battery performance will be discussed. Such mechanisms can be either introduced by additive materials in the electrolyte matrix or can even be inherently present in the electrolytes. In the first part of the talk, a methodology for toughening ceramic oxide electrolytes via the use of nanoscale reinforcement will be shown. Then, measurements showing viscoplastic deformation of amorphous sulfide electrolytes will be presented. Finally, strategies for implementing mechanically robust and high performance solid-state batteries will be discussed.