Substituted transition metal phospho olivines LiMM ' PO4 (M = Mn, M ' = Fe, Co, Mg): Optimisation routes for LiMnPO4

摘要

Since transition metal phospho olivines gain increasing interest as cathode materials for lithium ion batteries in the last decades lots of publications appeared. Various synthesis methods were in the focus of interest as well as structural investigations of the pure LiMPO4 and mixed Li (MM')PO4 phases (M, M' = Fe, Mn, Co, Ni, Mg, Zn, Al) and their structural changes during electrochemical conversion. Lithium insertion and exsertion mechanisms have been studied with the help of e.g. structural, optical and electronic, and electrochemical characterisation methods. Likewise many efforts have been done for material optimisation concerning synthesis procedure or substitution.