| 摘要 |
A method for preparing cathode material for use in lithium secondary batteries comprising the steps of: (a) mixing first and second reactants in a appropriate stoichiometric ratio to form a reaction mixture, wherein the first reactant is represented by LixMO2, M is either Ni or Co, and x is a variable from 0.25 to 1.1, and the second reactant is V2O3; V2O5, or NH4VO3, and (b) sintering the mixture in air at temperatures between 650 DEG C. DIFFERENCE 700 DEG C. for 1 DIFFERENCE 2 hours to obtain a cathode material represented by LiMVO4. The first reactant can be obtained by an aqueous-phase reaction by mixing a first aqueous solution, which contains M(NO3)2.6H2O, and a second aqueous, which contains LiOH.H2O, Li2O, Li2CO3, or Li(CH3COO), to form a precursory aqueous solution, and drying the precursory aqueous solution. Very high purity cathode materials can be obtained at a substantially reduced reaction time and substantially reduced reaction temperature, both of which will contribute to reduced production cost. The lithium secondary batteries so prepared can provide discharge voltages between 4.5 DIFFERENCE 4.9 volts. |
