Oxygen-deficient TiO_2-x interlayer enabling Li-rich Mn-based layered oxide cathodes with enhanced reversible capacity and cyclability.

ABSTRACT: The unique anion redox mechanism of Li-rich Mn-based layered oxide (LMLO) cathodes endows them with a higher specific capacity compared with conventional cathodes. However, the irreversible anion redox reactions can cause structural degradation and sluggish electrochemical kinetics in the cathode, resulting in a poor electrochemical performance in the batteries. Thus, to address these issues, a single-sided conductive oxygen-deficient TiO_2-x interlayer was applied on a commercial Celgard separator as a coating layer towards the LMLO cathode. After coating TiO_2-x, the initial coulombic efficiency (ICE) of the cathode increased from 92.1% to 95.8%, the capacity retention improved from 84.2% to 91.7% after 100 cycles, and the rate performance of the cathode

SUBMITTER: Lei Y 

PROVIDER: S-EPMC10240256 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature