Importance

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Abstract

Disclosed herein is a process for the manufacture of a cathode active material with a coreshell structure. The process includes the steps of:

(a) providing a particulate electrode active material according to a general formula Li1+xTM1−xO2, where TM is a combination of metals and includes Ni and Mn, and, optionally, at least one element selected from Al, Mg, Ba and transition metals other than Ni and Mn, and x is in the range of from 0.075 to 0.2, where at least 50 mole-% of the metal of TM is Mn,(b) treating the particulate electrode active material with an aqueous buffer solution with a pH value in the range of from 2.0 to 10.5,(c) removing the liquid phase by a solid-liquid separation method, and(d) treating the residue from step (c) at a temperature in the range of from 180 to 750° C.

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First Claim