Unravelling the Complex LiOH-Based Cathode Chemistry in Lithium-Oxygen Batteries.

ABSTRACT: The LiOH-based cathode chemistry has demonstrated potential for high-energy Li-O₂ batteries. However, the understanding of such complex chemistry remains incomplete. Herein, we use the combined experimental methods with ab initio calculations to study LiOH chemistry. We provide a unified reaction mechanism for LiOH formation during discharge via net 4 e^- oxygen reduction, in which Li₂ O₂ acts as intermediate in low water-content electrolyte but LiHO₂ as intermediate in high water-content electrolyte. Besides, LiOH decomposes via 1 e^- oxidation during charge, generating surface-reactive hydroxyl species that degrade organic electrolytes and generate protons. These protons lead to early removal of LiOH, followed by a new high-

SUBMITTER: Zhang X 

PROVIDER: S-EPMC10107133 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature