Electrochemical Interlayer Expansion and Dual Redox Activation for Fast Mg-Ion Transport and High Capacity in Quasi-1D TiS ₃.

ABSTRACT: Magnesium ion batteries (MIBs) offer promising solutions for next-generation sustainable energy storage systems owing to their intrinsic safety and cost-effectiveness, yet their development is hindered by the scarcity of high-capacity cathode materials, primarily due to poor magnesium ion transport and a limited number of electrochemically active sites. Here, we report a significant performance breakthrough in a structurally and electrochemically distinct, underexplored quasi-1D pseudolayered titanium trisulfide (TiS₃) cathode through interlayer engineering and exploitation of dual cationic/anionic redox chemistry. In operando and ex situ characterization reveal that interlayer expansion, induced by the intercalation of 1-butyl-1-methylpyrrolidinium (BMPyrr^+</

SUBMITTER: Jing P 

PROVIDER: S-EPMC12849046 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature