Peridynamic modeling of impact induced electrochemical degradation in all-solid-state batteries

The emerging all-solid-state batteries (ASSBs) hold significant promise for next-generation energy storage, yet their mechanical reliability under dynamic impact loading remains a critical challenge. During service, external dynamic loads with high strain rates can induce excessive crack propagation and catastrophic failure, posing substantial risks to structural integrity and electrochemical performance. This study establishes a multiphysics-coupled framework to investigate the dynamic fracture mechanisms within the composite cathode of ASSBs under impact conditions by integrating chemo-mechanical interactions. The model incorporates a bond-based peridynamic framework for active materials (AM), an interface model couples the electrochemical parameters governing charging processes, and a Johnson–Cook (JC) constitutive model for bond-type interactions in the solid electrolytes (SE) to characterize the strain rate-dependent behavior. We systematically investigate the effects of strain rate-dependent impact loading on fracture propagation modes and electrochemical performance degradation in composite cathode. The findings elucidate the multi-physics failure mechanisms under dynamic loading scenarios, providing critical insights for designing next-generation solid-state batteries with enhanced mechanical integrity and safety.