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    Method for preparing lithium iron phosphate nanopowder coated with carbon
    1.
    发明授权
    Method for preparing lithium iron phosphate nanopowder coated with carbon 有权

    公开(公告)号：US10153488B2

    公开(公告)日：2018-12-11

    申请号：US14421633

    申请日：2014-01-09

    Applicant: LG Chem, Ltd.

    Inventor： Wook Jang ,  Seung Beom Cho ,  In Kook Jun

    IPC: H01M4/52 ,  H01M4/04 ,  H01M4/583

    Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder coated with carbon, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycol-based solvent, (b) putting the mixture solution into a reactor, heating and concentrating to prepare a metal glycolate slurry, (c) drying the metal glycolate slurry to form a solid content, and (d) firing the solid content to prepare the lithium iron phosphate nanopowder coated with carbon, and a lithium iron phosphate nanopowder coated with carbon prepared by the method.

    METHOD FOR PREPARING LITHIUM IRON PHOSPHATE NANOPOWDER
    3.
    发明申请
    METHOD FOR PREPARING LITHIUM IRON PHOSPHATE NANOPOWDER 有权
    制备磷酸铁锂纳米粒子的方法

    公开(公告)号：US20150280236A1

    公开(公告)日：2015-10-01

    申请号：US14429066

    申请日：2014-01-09

    Applicant: LG CHEM, LTD.

    Inventor： In Kook Jun ,  Seung Beom Cho ,  Myoung Hwan Oh

    IPC: H01M4/58 ,  H01M4/587 ,  C01B25/45 ,  H01M4/36

    CPC classification number: H01M4/5825 ,  C01B25/45 ,  C01P2002/30 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/64 ,  H01M4/0402 ,  H01M4/136 ,  H01M4/366 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/028 ,  Y02P20/544 ,  Y10T428/2982

    Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a reaction solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 1 to 10 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method, a supercritical hydrothermal synthesis method and a glycothermal synthesis method, a reaction may be performed under a relatively lower pressure. Thus, a high temperature/high pressure reactor is not necessary and process safety and economic feasibility may be secured. In addition, a lithium iron phosphate nanopowder having uniform particle size and effectively controlled particle size distribution may be easily prepared.

    Abstract translation: 本发明涉及一种制备磷酸铁锂纳米粉末的方法，包括以下步骤：（a）通过在反应溶剂中加入锂前体，铁前体和磷前体制备混合溶液，和（b）将 混合溶液加入反应器中，加热至1至10巴的压力条件下制备磷酸铁锂纳米粉末，并通过该方法制备磷酸铁锂纳米粉末。 当与通常的水热合成法，超临界水热合成法和糖热合成法相比时，可以在相对较低的压力下进行反应。 因此，不需要高温/高压反应器，并且可以确保工艺安全性和经济可行性。 此外，可以容易地制备具有均匀粒度和有效控制粒度分布的磷酸铁锂纳米粉末。

    Method for preparing lithium iron phosphate nanopowder
    5.
    发明授权
    Method for preparing lithium iron phosphate nanopowder 有权

    公开(公告)号：US10581076B2

    公开(公告)日：2020-03-03

    申请号：US14510495

    申请日：2014-10-09

    Applicant: LG Chem, Ltd.

    Inventor： In Kook Jun ,  Seung Beom Cho ,  Myoung Hwan Oh

    IPC: H01M4/58 ,  H01M4/36 ,  C01B25/45 ,  H01M4/587 ,  H01M10/0525 ,  B82Y30/00 ,  C01G49/00 ,  H01M4/04 ,  H01M10/052 ,  H01M4/62 ,  H01M4/02

    Abstract: The present invention relates to a method for preparing a lithium iron phosphate nanopowder, including the steps of (a) preparing a mixture solution by adding a lithium precursor, an iron precursor and a phosphorus precursor in a glycerol solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 10 bar to 100 bar, and a lithium iron phosphate nanopowder prepared by the method. When compared to a common hydrothermal synthesis method and a supercritical hydrothermal synthesis method, a reaction may be performed under a relatively lower pressure. When compared to a common glycothermal synthesis method, a lithium iron phosphate nanopowder having effectively controlled particle size and particle size distribution may be easily prepared.

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