公开(公告)号：US20200243858A1

公开(公告)日：2020-07-30

申请号：US16839564

申请日：2020-04-03

Applicant: HALDOR TOPSØE A/S

Inventor： Jon Fold VON BÜLOW ,  Søren DAHL ,  Jonathan HØJBERG ,  Jakob Weiland HØJ

IPC: H01M4/505 ,  H01M10/0525 ,  C01G53/00 ,  H01M4/525

Abstract: A lithium positive electrode active material intermediate including less than 80 wt % spinel phase and a net chemical composition of LixNiyMn2-yO4-δ wherein 0.9≤x≤1.1; 0.4≤y≤0.5; and 0.1≤δ. 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° C. to 1200° 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° C. to 1200° 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.