METHOD OF PREPARING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES AND LITHIUM SECONDARY BATTERIES USING THE SAME

摘要

PURPOSE: A manufacturing method of a silicate-based electrode active material is provided to ensure the particle size and composition uniformity of a silicate electrode active material by the use of microwaves as a heating source. CONSTITUTION: A manufacturing method of an electrode active material represented by chemical formula Li2MSiO4 comprises: a step of dispersing a silicon compound into a solvent; a step of mixing lithium salt and transition metal salt into the solution, and forming a complex ion by adding a chelating agent into the mixture; and a step of gelating the mixture through a microwave treatment. In the chemical formula, M is Mn, Fe, Co, Ni, Ti, V, Cr or a mixture thereof. The molar ratio of the lithium salt and the transition metal salt is 2:1.