Abstract
All-solid-state batteries (ASSB) are a promising alternative to their conventional liquid electrolyte-based counterparts due to their increased safety and their potential to achieve higher energy density. To achieve these goals, a ASSB requires a solid-state electrolyte (SSE) with high ionic conductivity near room temperature and high electrochemical stability. Lithium and sodium salts of boron cluster anions have attracted much attention as SSE candidates due to their high ionic conductivities (>103 S/cm) following a solid-phase transition into a disordered phase at relatively low temperatures (50-130°C) and relatively wide electrochemical window.[1]In considering their application to ASSB, their mechanical properties also play a critical role due to the stresses the electrolyte material is subjected to during battery operation.[2] First-principle calculations have been instrumental so far to provide an initial assessment of bulk and elastic moduli for some selected boron cluster solid electrolytes,[3-5] but direct measurements are still lacking. Herein, we will report the first determination of elastic moduli and hardnesses of the most representative boron cluster salts using both nanoindentation continuous stiffness method (CSM) and ultrasound under inert atmosphere and compared with DFT calculations.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call