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    KESTERITE MATERIAL OF CZTS, CZTSe OR CZTSSe TYPE
    1.
    发明申请
    KESTERITE MATERIAL OF CZTS, CZTSe OR CZTSSe TYPE 审中-公开

    公开(公告)号：US20190172711A1

    公开(公告)日：2019-06-06

    申请号：US16324114

    申请日：2017-09-01

    Applicant: HALDOR TOPSØE A/S

    Inventor： Niels Christian SCHJØDT ,  Søren DAHL ,  Jesper NERLOV

    IPC: H01L21/02 ,  C01B19/00 ,  C01G19/00 ,  H01L31/032

    Abstract: A method of producing a kesterite material of CZTS, CZTSe or CZTSSe type, including the steps of: a) preparing an acidic solution by dissolving copper and zinc salts in water in desired molar ratio, b) preparing a basic solution by dissolving an alkali metal stannate together with an alkali metal carbonate or an alkali metal hydrogen carbonate or an alkali metal hydroxide or a combination thereof, and optionally with an alkali metal selenate or an alkali metal selenite or a mixture thereof, c) carrying out a precipitation reaction by mixing the acidic and the basic solution, d) drying the precipitate thereby providing a precursor for the kesterite material, and e) sulfurizing the precursor of step d to provide the kesterite material. Also, a precursor for a kesterite material of CZTS, CZTSe or CZTSSe type.

    HIGH TAP DENSITY LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL, INTERMEDIATE AND PROCESS OF PREPARATION
    3.
    发明申请
    HIGH TAP DENSITY LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL, INTERMEDIATE AND PROCESS OF PREPARATION 审中-公开

    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.

    DOPED LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL AND PROCESS FOR MANUFACTURE THEREOF
    5.
    发明申请
    DOPED LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL AND PROCESS FOR MANUFACTURE THEREOF 有权

    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.

    LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL
    7.
    发明申请
    LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL 有权

    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.

    LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL
    8.
    发明申请
    LITHIUM POSITIVE ELECTRODE ACTIVE MATERIAL 有权

    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.

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