Heterogeneous Reinforcements to Mitigate Li Penetration through Solid Electrolytes in All‐Solid‐State Batteries

Dendrite growth is one of the leading factors that cause cycling deterioration for all-solid-state batteries (ASSBs). However, using a single dominant material to form solid electrolyte has encountered several setbacks due intrinsically competing in mechanics and electrochemistry. Inspired by “brick-and-mortar” structure, strategy embedding heterogeneous blocks (HBs) within (SE) proposed mitigate suppress dendrite growth-induced internal short circuits (ISCs). A phase-field-based multiphysics model established describe behavior. Results reveal characteristic length ratio e between HBs SE governing factor dominates path. The results show long HB multiple medium with specific layouts can divert avoid ISCs completely. For cases, delay ISC certain extent. imply adding an appropriately designed layer into will effectively block dendrites, also define desired mechanical property domains. This work provides mechanistic understanding cracking opens new perspectives selection structural design SEs lifecycle ASSBs.