Inhibiting homogeneous catalysis of cobalt ions towards stable battery cycling of LiCoO at 4.6 V.

Raising the cut-off voltage increases the energy density of LiCoO for lithium-ion batteries, but it exacerbates the decomposition of the electrolyte and the capacity decay of LiCoO. To address such issues, many artificial cathode-electrolyte-interphases (CEIs) have been constructed to stabilize the cathode interface with an additive. However, electrolyte degradation by catalytic oxidation of Co ions dissolved in the electrolyte has rarely been explored.