Origin of O₂ Generation in Sulfide-Based All-Solid-State Batteries and its Impact on High Energy Density.

ABSTRACT: The cathode surface of sulfide-based all-solid-state batteries (SBs) is commonly coated with amorphous-LiNbO₃ in order to stabilize charge-discharge reactions. However, high-voltage charging diminishes the advantages, which is caused by problems with the amorphous-LiNbO₃ coating layer. This study has investigated the degradation of amorphous-LiNbO₃ coating layer directly during the high-voltage charging of SBs. O₂ generation via Li extraction from the amorphous-LiNbO₃ coating layer is observed using electrochemical gas analysis and electrochemical X-ray photoelectron spectroscopy. This O₂ leads to the formation of an oxidative solid electrolyte (SE) around the coating layer and degrades the battery performance. On the other

SUBMITTER: Yoshikawa K 

PROVIDER: S-EPMC11425888 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature