Dispersed materials for rechargeable lithium batteries: Reactive and non-reactive grinding

Reactive and non-reactive grinding has been used to prepare high dispersed lithium-transition metal cathode materials (LiMn2O4, LiCoO2, LiV3O8, Li3Fe2(PO4)3, LiTi2(PO4)3) and inorganic solid state Li-ion electrolytes (Li1.3Al0.3Ti1.7(PO4)3) for rechargeable lithium batteries. Submicron particle size and the presence of cationic vacancies and cationic disordering positively influence electrochemical properties of as prepared cathodes, leading to larger practical capacity and stability upon intercalation-deintercalation of lithium ions. However, the advantages are observed only when the first electrochemical step is an insertion of Li+ ions (Li battery discharge). The conductivity of the Li1.3Al0.3Ti1.7(PO4)3 lithium ion electrolyte prepared by using MA was of 2-3 order of magnitude higher than that for nonactivated sample owing to the absence of non-conductive impurities and lower grain boundary resistance.