Coated particulate material comprising complex layered oxide for use as electrode active material, respective methods of making and uses thereof

Described is a coated particulate material for use as electrode active material in an electrode and/or in a solid-state lithium-ion electrochemical cell and/or in an all solid-state lithium-ion electrochemical cell, comprising a plurality of core particles, each core particle comprising at least one nickel-containing complex layered oxide, and disposed on the surfaces of the core particles, a coating comprising carbonate ions, lithium and at least one further element. Further described is an electrode for use in a solid-state or all solid-state lithium-ion electrochemical cell and a respective electrochemical cell, each of them comprising said coated particulate material. Also described herein are methods of making the coated particulate material and the electrode, as well as respective uses of the coated particulate material.