Haldor Topse A/s

Jon Fold Von Bülow

Søren Dahl

Jakob Weiland Høj

Jonathan Højberg

A lithium positive electrode active material intermediate including less than 80 wt % spinel phase and a net chemical composition of LiNiMnOwherein 0.9&#x2264;x&#x2264;1.1; 0.4&#x2264;y&#x2264;0.5; and 0.1&#x2264;&#x3b4;. Further, a process for the preparation of a lithium positive electrode active material with high tap density for a high voltage secondary battery where the cathode is fully or partially operated above 4.4 V vs. Li/Li+, comprising the steps of a)heating a precursor in a reducing atmosphere at a temperature of from 300&#xb0; C. to 1200&#xb0; C. to obtain a lithium positive electrode active material intermediate; b)heating the product of step a. in a non-reducing atmosphere at a temperature of from 300&#xb0; C. to 1200&#xb0; C.; wherein the mass of the product of step b. increases by at least 0.25% compared to the mass of the product of step a.

High tap density lithium positive electrode active material, intermediate and process of preparation

A lithium positive electrode active material intermediate comprising less than 80 wt % spinel phase and a net chemical composition of LiNiMnOwherein 0.9&#x2264;x&#x2264;1.1; 0.4&#x2264;y&#x2264;0.5; and 0.1&#x2264;&#x3b4;; where the lithium positive electrode active material intermediate has been heat treated in a reducing atmosphere at a temperature of from 300&#xb0; C. to 1200&#xb0; C. A process for the preparation of a lithium positive electrode active material with high tap density for a high voltage secondary battery where the cathode is fully or partially operated above 4.4 V vs. Li/Li+, comprising the steps of a) heating a precursor in a reducing atmosphere at a temperature of from 300&#xb0; C. to 1200&#xb0; C. to obtain a lithium positive electrode active material intermediate; b) heating the product of step a. in a non-reducing atmosphere at a temperature of from 300&#xb0; C. to 1200&#xb0; C.

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Jon Fold Von Bülow