In situ X-ray Raman spectroscopy and magnetic susceptibility study on the Li[Li0.15Mn1.85]O4 oxygen anion redox reaction

Abstract

Li-rich compounds have received significant attention as electrode materials for lithium-ion batteries (LIBs) because of their large rechargeable capacities (q_recha). We have demonstrated a novel reaction scheme of one of the Li-rich compounds, Li[Li_0.15Mn_1.85]O₄, where Mn⁴⁺ ions are reduced to lower valence states such as Mn³⁺ and Mn²⁺ ions during charging at voltages above 5.0 V.