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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.
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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
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.
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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
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.
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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
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
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