Synthesis of nanoparticles of lithium metal phosphate cathode material for lithium secondary battery

摘要

Novel process for the preparation of finely divided, nano-structured, olivine lithium metal phosphates (LiMPO4) (where metal M is iron, cobalt, manganese, nickel, vanadium, copper, titanium and mix of them) materials have been developed. This so called Polyol method consists of heating of suited precursor materials in a multivalent, high-boiling point multivalent alcohol like glycols with the general formula HO(C2H4O), H where n=1-10 or HO(C3H6O)nH where n=1-10, or other polyols with the general formula HOCH2(C3H5OH)nH where n=1-10, like for example the tridecane-1,4,7,10,13-pentaol. A novel method for implementing the resulting materials as cathode materials for Li.-ion batteries is also developed.