公开(公告)号：US10601041B2

公开(公告)日：2020-03-24

申请号：US16371474

申请日：2019-04-01

Applicant: HALDOR TOPSØE A/S

Inventor： Jonathan H∅jberg ,  Jakob Weiland Høj ,  Søren Dahl ,  Christian Fink ElkjÆr

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

Abstract: A lithium positive electrode active material including at least 95 wt % spinel having a chemical composition of LixNiyMn2-y-z1-z2D1z1D2z2O4, wherein 0.9≤x≤1.1, 0.4≤y≤0.5, 0.005≤z1≤0.2, 0≤z2≤0.2, wherein D1 and D2 are dopants chosen between the following elements: Co, Cu, Ti, Zn, Mg, Fe or combinations thereof. D1 and D2 are different dopants, and the lithium positive electrode active material is a powder composed of material particles, wherein the distribution of dopant D1 is non-uniform along a radial axis of the material particles and the distribution of the dopant D2 is substantially uniform along the radial axis of the material particles. Also, a process for preparing the lithium positive electrode active material and a secondary battery comprising the lithium positive electrode active material.

公开(公告)号：US11444279B2

公开(公告)日：2022-09-13

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 ,  H01M4/525 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/02

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.