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    HYDROTHERMAL SYNTHESIS METHOD FOR NANO LITHIUM MANGANESE IRON PHOSPHATE
    2.
    发明公开
    HYDROTHERMAL SYNTHESIS METHOD FOR NANO LITHIUM MANGANESE IRON PHOSPHATE 审中-实审

    公开(公告)号：EP4393875A1

    公开(公告)日：2024-07-03

    申请号：EP22937121.6

    申请日：2022-08-05

    申请人： Shenzhen Warrant New Energy Co., Ltd.

    发明人： TIAN, Yihong

    IPC分类号： C01B25/45 ,  C01B32/15 ,  B82Y40/00 ,  B82Y30/00

    CPC分类号： Y02E60/10

    摘要： The present invention relates to the technical field of preparation of lithium battery raw materials, especially to a hydrothermal synthesis method for nano lithium iron manganese phosphate, including the following steps: mixing lithium phosphate with water, adding them to autoclave 1, heating from room temperature to 140-150°C while stirring to obtain slurry A; dissolving ferrous sulfate and manganese sulfate in water, adding them to autoclave 2, and heating to 140-150°C to obtain slurry B; heating autoclave 3 to 140-150°C, adding slurry A and slurry B in concurrent flow to autoclave 3, stirring, maintaining reaction at 140-150°C for 2-4 hours; stopping heating, cooling, opening a discharge valve, filtering product, washing filter cake, drying in vacuum to obtain lithium iron manganese phosphate powder, and coating with carbon. High-temperature mixing of reaction raw materials creates a true molecular mixing reaction starting condition. Prepared material particles are uniform with a three-dimensional scale reaching a nano scale, which is conducive to shortening lithium ion diffusion paths, fundamentally improving electrochemical performance of the material and prolonging its cycle life.

    SINGLE-CORE MULTI-SHELL LITHIUM MANGANESE IRON PHOSPHATE COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR, AND SECONDARY BATTERY¿
    3.
    发明公开
    SINGLE-CORE MULTI-SHELL LITHIUM MANGANESE IRON PHOSPHATE COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR, AND SECONDARY BATTERY¿ 审中-实审

    公开(公告)号：EP4354549A1

    公开(公告)日：2024-04-17

    申请号：EP23754096.8

    申请日：2023-03-22

    申请人： Shenzhen Dynanonic Co., Ltd. ,  Foshan Dynanonic Technology Co., Ltd. ,  Qujing Dynanonic Co., Ltd.

    发明人： XU, Rongyi ,  YANG, Yi ,  KONG, Lingyong ,  LI, Yineng ,  LIU, Qifeng

    IPC分类号： H01M4/58 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  C01B25/45 ,  C01B32/15 ,  B82Y30/00

    CPC分类号： Y02E60/10

    摘要： The application discloses a single-core multi-shell lithium manganese iron phosphate cathode material and a preparation method thereof, and a secondary battery. The composite material includes: a carbon-coated lithium iron phosphate core, and a plurality of lithium manganese iron phosphate cladding layers cladded on an outer surface of the carbon-coated lithium iron phosphate core. Each of the plurality of lithium manganese iron phosphate cladding layers includes lithium manganese iron phosphate particles and a carbon material coated on the lithium manganese iron phosphate particles. The lithium manganese iron phosphate particles in the plurality of the lithium manganese iron phosphate cladding layers have particle sizes increase in a radial direction from inside to outside. The composite material prepared by the method of the present application is in a single-core multi-shell structure, in which, the core is carbon-coated lithium iron phosphate, and the shell includes a plurality of lithium manganese iron phosphate cladding layers. Based on the lithium iron phosphate core and multiple shell layers of lithium manganese iron phosphate, as well as the regular arrangement of the particle sizes, the composite material has high energy density, electrical conductivity, compaction density, safety, stability, and other electrochemical properties.

    PREPARATION METHOD OF LITHIUM IRON PHOSPHATE CATHODE MATERIAL
    4.
    发明公开
    PREPARATION METHOD OF LITHIUM IRON PHOSPHATE CATHODE MATERIAL 审中-实审

    公开(公告)号：EP4345059A1

    公开(公告)日：2024-04-03

    申请号：EP23172919.5

    申请日：2023-05-11

    申请人： Advanced Lithium Electrochemistry Co., Ltd.

    发明人： HSIEH, Han-Wei ,  LIN, Yuan-Kai

    IPC分类号： C01B25/26 ,  C01B25/37 ,  C01B25/45 ,  H01M4/58

    摘要： A preparation method of a lithium iron phosphate cathode material includes steps of (a) providing a phosphoric acid, an iron powder, a carbon source, wherein the phosphoric acid and the iron powder are reacted to produce a first product, and the first product is amorphous iron phosphate with chemical formula of a-FePO 4 • xH 2 O (x>0); (b) providing a lithium salt mixture, wherein the lithium salt mixture includes a lithium hydroxide and a lithium carbonate; (c) grinding and mixing the first product, the carbon source, and the lithium salt mixture; (d) calcining the first product and the lithium salt mixture to produce a precursor, wherein the precursor has a formula of Fe 3 (PO 4 ) 2 • 8H 2 O+Li 3 PO 4 ; and (e) calcining the precursor and the carbon source to obtain the lithium iron phosphate cathode material.

    TITANIUM AND ZIRCONIUM CO-DOPED, CARBON-COATED LITHIUM IRON PHOSPHATE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
    8.
    发明公开
    TITANIUM AND ZIRCONIUM CO-DOPED, CARBON-COATED LITHIUM IRON PHOSPHATE MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF 审中-公开

    公开(公告)号：EP4230580A1

    公开(公告)日：2023-08-23

    申请号：EP22891174.9

    申请日：2022-11-11

    申请人： HUBEI WANRUN NEW ENERGY TECHNOLOGY CO., LTD.

    发明人： CAO, Minglei ,  WANG, Qin ,  YANG, Jiaojiao

    IPC分类号： C01B25/45 ,  C01B32/05 ,  H01M4/38 ,  H01M4/58 ,  H01M4/62

    摘要： The present disclosure relates to a titanium-zirconium co-doped carbon-coated lithium iron phosphate material and a production method and use thereof. The material has a chemical formula of Li 1-y Zr y Fe 1-x Ti x PO 4 /C, wherein titanium is doped to Fe site, zirconium is doped to Li site, 0.001≤x≤0.05, and 0.001≤y≤0.02. The production method comprises mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid medium, ball-milling and sand-milling the mixture to a certain slurry particle size, spray-drying the slurry for granulation, and then sintering the dried spray material in an atmosphere furnace. The material is used as a positive electrode material in lithium-ion batteries. In the present disclosure, by doping titanium and zirconium elements into carbon-coated lithium iron phosphate, the ion and electron transport capacity of lithium iron phosphate is effectively enhanced and the compaction density of the material is improved. The material is very suitable to be used as a positive electrode material for a lithium-ion power battery with high energy and high power density.

    SOLID-STATE BATTERY
    9.
    发明公开
    SOLID-STATE BATTERY 审中-公开

    公开(公告)号：EP4122882A1

    公开(公告)日：2023-01-25

    申请号：EP21771000.3

    申请日：2021-03-16

    申请人： Murata Manufacturing Co., Ltd.

    发明人： YOSHIOKA, Makoto ,  TAKANO, Ryohei

    IPC分类号： C01B25/45 ,  H01M4/13 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0562 ,  H01B1/06 ,  H01B1/08

    摘要： In one embodiment of the present invention, a solid state battery is provided. The solid state battery includes, along a stacking direction, at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer, in which at least the solid electrolyte layer includes solid electrolyte particles including a portion in which a constituent ratio of a transition metal element to all metal elements (excluding lithium) is 0.0% or more and 15% or less.