| abstract |
The present invention relates to an irreversible additive contained in a cathode material for a lithium secondary battery, Wherein the irreversible additive comprises a lithium-excess transition metal oxide in the form of a secondary particle formed by aggregating a plurality of primary particles, The surface of the primary particles and the surface of the secondary particles are coated with at least one compound containing a metal element (M) and at least one compound containing boron (B) Wherein M is any one selected from the group consisting of Al, Ti, Zr, and W, a method for producing the irreversible additive, and a cathode material containing the irreversible additive. |