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