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.

公开(公告)号：US20210130190A1

公开(公告)日：2021-05-06

申请号：US17041834

申请日：2019-05-06

Applicant: HALDOR TOPSØE A/S

Inventor： Jonathan HØJBERG ,  Søren DAHL ,  Jakob Weiland HØJ ,  Christian Fink ELKJÆR

IPC: C01G53/00

Abstract: The invention relates to a lithium positive electrode active material for a high voltage secondary battery, where the cathode is fully or partially operated above 4.4 V vs. Li/Li+. The lithium positive electrode active material comprises at least 95 wt % spinel having a chemical composition of LixNiyMn2-y-zDzO4, wherein 0.9≤x≤1.1, 0.4≤y≤0.5, 0.02≤z≤0.2, wherein D is a dopant chosen between the following elements: Co, Cu, Ti, Zn, Mg, Fe or combinations thereof. The lithium positive electrode active material is a powder composed of secondary particles formed by primary particles, wherein said lithium positive electrode active material has a tap density of at least 1.9 g/cm3. The invention also relates to process for preparing the lithium positive electrode active material of the invention and a secondary battery comprising the lithium positive electrode active material of the invention.

公开(公告)号：US20190173084A1

公开(公告)日：2019-06-06

申请号：US16323566

申请日：2017-08-21

Applicant: HALDOR TOPSØE A/S

Inventor： Søren DAHL ,  Jakob Weiland HØJ ,  Jonathan HØJBERG ,  Line Holten KOLLIN

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01G45/12

Abstract: The invention relates to a cathode active material for a high voltage secondary battery with a cathode arranged for being fully or mainly operated above 4.4 V vs. Li/Li+, wherein the cathode active material is an oxide that comprises sulfate as a capacity fade reducing compound. The invention also relates to a cathode active material for a high voltage secondary battery having the composition LixMyMn2−yO4−v(SO4)z, where 0.9≤x≤1.1, 0.4≤y≤0.5, 0

公开(公告)号：US20220013771A1

公开(公告)日：2022-01-13

申请号：US17289432

申请日：2019-12-18

Applicant: HALDOR TOPSØE A/S

Inventor： Jonathan HØJBERG ,  Jakob Weiland HØJ ,  Christian Fink ELKJÆR ,  Søren DAHL ,  Lars Fahl LUNDEGAARD

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M4/36

Abstract: The present invention relates to a lithium positive electrode active material for a high voltage secondary battery, where the lithium positive electrode active material comprises at least 94 wt % spinel. The spinel has a net chemical composition of LixNiyMn2-yO4, wherein: 0.95≤x≤1.05; 0.43≤y≤0.47; and wherein the lithium positive electrode active material has a capacity of at least 138 mAh/g, wherein y is determined by means of a method selected from the group consisting of electrochemical determination, X-ray diffraction and scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDS). The invention also relates to a process for preparation of a lithium positive electrode active material for a high voltage secondary battery of the invention as well as a secondary battery comprising a lithium positive electrode active material according to the invention.

公开(公告)号：US20220013762A1

公开(公告)日：2022-01-13

申请号：US17289313

申请日：2019-12-18

Applicant: HALDOR TOPSØE A/S

Inventor： Jonathan HØJBERG ,  Jakob Weiland HØJ ,  Christian Fink ELKJÆR ,  Lars Fahl LUNDEGAARD ,  Søren DAHL

IPC: H01M4/131 ,  H01M4/485 ,  C01G45/12 ,  C01G53/00

Abstract: The invention relates to a lithium positive electrode active material for a high voltage secondary battery: the lithium positive electrode active material comprising at least 94 wt % spinel, where the spinel has a net chemical composition of LixNiyMn2-yO4, wherein: 0.95≤x≤1.05; 0.43≤y≤0.47. The lithium positive electrode active material is made up of particles characterized by one or more of the following parameter ranges: the particles have average aspect ratio below 1.6, the particles have a roughness below 1.35, particles have a circularity above 0.55. Then invention also relates to a process for the preparation of the lithium positive electrode active material as well as a secondary battery comprising the lithium positive electrode active material.

公开(公告)号：US20210399298A1

公开(公告)日：2021-12-23

申请号：US17289266

申请日：2019-12-18

Applicant: HALDOR TOPSØE A/S

Inventor： Jonathan HØJBERG ,  Jakob Weiland HØJ ,  Christian Fink ELKJÆR ,  Lars Fahl LUNDEGAARD ,  Søren DAHL

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M4/38

Abstract: The present invention relates to a lithium positive electrode active material for a high voltage secondary battery, where the lithium positive electrode active material comprising a spinel, and the spinel has a chemical composition of LixNiyMn2-yO4, wherein: 0.95≤x≤1.05; and 0.43≤y≤0.47. The lithium positive electrode active material is synthesized from precursors containing Li, Ni, and Mn in a ratio Li:Ni:Mn:X:Y:2−Y, wherein: 0.95≤X≤1.05; and 0.42≤Y