Thermodynamically spontaneously intercalated H₃O⁺ enables LiMn₂O₄ with enhanced proton tolerance in aqueous batteries.

ABSTRACT: LiMn₂O₄ (LMO) is an attractive positive electrode material for aqueous lithium-ion batteries (ALIBs), but its inferior cycle performance limits the practical application. The degradation mechanism of LMO in ALIBs is still unclear, resulting in inability to predictably improve its structural stability. The electrode/electrolyte interface is believed to play an important role in electrode degradation. However, the interactions of the water-containing electrode/electrolyte interface of LMO are underexplored. In this work, we demonstrate the insertion of H₃O⁺ into LMO during cycling in aqueous electrolyte and elucidate the paradoxical effects of H₃O⁺. The crystal H₃O⁺ enhances the structural stability of LM

SUBMITTER: Huang J 

PROVIDER: S-EPMC11303759 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature