公开(公告)号：US11955629B2

公开(公告)日：2024-04-09

申请号：US15757589

申请日：2017-03-31

Applicant: LG Chem, Ltd.

Inventor： Jong Pil Kim ,  Seung Beom Cho ,  Won Tae Kim ,  San Su Son ,  Hyuck Lee

IPC: H01M4/505 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/131 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525

CPC classification number: H01M4/505 ,  C01G53/50 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  C01P2002/74 ,  C01P2002/76 ,  C01P2002/78 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 Å or less, the thickness of inter slab is 2.59 Å or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

公开(公告)号：US20230420649A1

公开(公告)日：2023-12-28

申请号：US18243974

申请日：2023-09-08

Applicant: LG Chem, Ltd.

Inventor： Myung Gi Jeong ,  Se Hwan Son ,  Seung Beom Cho ,  Sang Soon Choi

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/134 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01G53/00

CPC classification number: H01M4/364 ,  H01M4/131 ,  H01M4/134 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01G53/50 ,  C01G53/006 ,  H01M4/0471

Abstract: A positive electrode active material includes a lithium transition metal oxide, in which a cobalt content in the lithium transition metal oxide is less than a manganese content, wherein at least one of nickel, cobalt, and manganese in the lithium transition metal oxide has a concentration gradient that gradually changes from a center of a particle to a surface thereof, the positive electrode active material is in the form of a secondary particle formed by agglomeration of primary particles, and a ratio in which angles between c-axis directions, which are measured at at least 8 points on a surface of the positive electrode active material by TEM analysis, and a growth direction of the particle at the measuring point satisfy 85° to 95° is 60% or more.

公开(公告)号：US11799071B2

公开(公告)日：2023-10-24

申请号：US17050553

申请日：2019-05-10

Applicant: LG Chem, Ltd.

Inventor： Myung Gi Jeong ,  Se Hwan Son ,  Seung Beom Cho ,  Sang Soon Choi

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/131 ,  H01M4/134 ,  H01M4/505 ,  H01M10/0525 ,  C01G53/00 ,  H01M4/04 ,  H01M4/02

CPC classification number: H01M4/364 ,  C01G53/006 ,  C01G53/50 ,  H01M4/131 ,  H01M4/134 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2004/04 ,  C01P2006/40 ,  H01M4/0471 ,  H01M2004/028

Abstract: A positive electrode active material includes a lithium transition metal oxide, in which a cobalt content in the lithium transition metal oxide is less than a manganese content, wherein at least one of nickel, cobalt, and manganese in the lithium transition metal oxide has a concentration gradient that gradually changes from a center of a particle to a surface thereof, the positive electrode active material is in the form of a secondary particle formed by agglomeration of primary particles, and a ratio in which angles between c-axis directions, which are measured at at least 8 points on a surface of the positive electrode active material by TEM analysis, and a growth direction of the particle at the measuring point satisfy 85° to 95° is 60% or more.

公开(公告)号：US20220238871A1

公开(公告)日：2022-07-28

申请号：US17606648

申请日：2020-09-25

Applicant: LG Chem, Ltd.

Inventor： Min Joon Lee ,  Seung Beom Cho ,  Seong Ji Ye ,  Yoon Bin Park

IPC: H01M4/505 ,  H01M4/525 ,  C01G53/00

Abstract: A method of preparing a positive electrode active material precursor for a secondary battery includes preparing a positive electrode active material precursor by a co-precipitation reaction while adding a transition metal-containing solution containing transition metal cations, a basic solution, and an ammonium solution to a batch-type reactor, wherein a molar ratio of ammonium ions contained in the ammonium solution to the transition metal cations contained in the transition metal-containing solution added to the batch-type reactor is 0.5 or less, and a pH in the batch-type reactor is maintained at 11.2 or less.

公开(公告)号：US20210028445A1

公开(公告)日：2021-01-28

申请号：US16982812

申请日：2019-03-20

Applicant: LG Chem, Ltd.

Inventor： Won Sig Jung ,  Seung Beom Cho ,  Sang Soon Choi

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/0525

Abstract: A method of preparing a positive electrode active material that includes introducing a reaction mixture including a lithium source material and a nickel-manganese-cobalt precursor into a continuous firing furnace and subjecting the same to primary heat treatment, thereby preparing a fired mixture; subjecting the fired mixture to pulverization or size classification; and introducing the fired mixture having been pulverized or size-classified into a rotary kiln and subjecting the same to secondary heat treatment, thereby forming a lithium nickel manganese cobalt-based positive electrode active material.

公开(公告)号：US20200350554A1

公开(公告)日：2020-11-05

申请号：US16614233

申请日：2018-11-23

Applicant: LG Chem, Ltd.

Inventor： Sang Soon Choi ,  Seung Beom Cho ,  Jung Ho Lim ,  Won Sig Jung

IPC: H01M4/04 ,  H01M4/505 ,  H01M4/525

Abstract: A method for preparing a positive electrode active material includes: a step for adding a reaction mixture containing a lithium-raw material and a nickel-manganese-cobalt precursor into a first crucible and performing a first heat treatment at a temperature of 500-800° C. to form a pre-calcinated mixture; a step for extracting the pre-calcinated mixture from the first crucible and pulverizing or classifying the same; and a step for adding the pulverized or classified pre-calcinated mixture into a second crucible and performing a second heat treatment at a temperature of 700-1000° C. under an atmosphere in which an oxygen partial pressure is 20% or less to form a lithium nickel-manganese-cobalt-based positive electrode active material, wherein a volume of the pre-calcinated mixture formed after the first heat treatment is 20-50% with respect to a volume of the reaction mixture added into the first crucible.

公开(公告)号：US20180090782A1

公开(公告)日：2018-03-29

申请号：US15567228

申请日：2016-04-27

Applicant: LG Chem, Ltd.

Inventor： Ji Hoon Choi ,  In Kook Jun ,  Seung Beom Cho

IPC: H01M10/052 ,  H01M4/525 ,  H01M4/58 ,  H01M4/1391

CPC classification number: H01M10/052 ,  G01N23/20075 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/62 ,  H01M2004/027 ,  H01M2004/028

Abstract: The present invention relates to a positive electrode active material for a secondary battery, a method for preparing the same, and a secondary battery including the same, and more particularly to a positive electrode active material for a secondary battery, which includes lithium transition metal oxide particles represented by Formula 1; and lithium metal phosphate nanoparticles disposed on the surface of the lithium transition metal oxide particles and represented by Formula 2, a method for preparing the same, and a lithium secondary battery including the same. Li(1+a)(Ni1-b-cMbCoc)O2  [Formula 1] In which, M is at least one metal selected from the group consisting of Mn, Al, Cu, Fe, Mg, Cr, Sr, V, Sc and Y, 0≦a≦0.2, 0≦b≦1, and 0≦c≦1. Li1+xM′xM″2-x(PO4)3  [Formula 2] In which, M′ is Al, Y, Cr, or Ca, M″ is Ge, Ti, Sn, Hf, Zn, or Zr, and 0≦x≦0.5.

公开(公告)号：US09865875B2

公开(公告)日：2018-01-09

申请号：US14510370

申请日：2014-10-09

Applicant: LG Chem, Ltd.

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

IPC: H01M6/04 ,  H01M4/58 ,  H01M4/36 ,  C01B25/45 ,  H01M4/04 ,  H01M4/136 ,  H01M4/587 ,  H01M10/052 ,  H01M4/02 ,  H01M4/62

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 glycerol solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 1 bar 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.

公开(公告)号：US09627685B2

公开(公告)日：2017-04-18

申请号：US14429062

申请日：2014-01-09

Applicant: LG Chem, Ltd.

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

IPC: H01M4/13 ,  H01M4/58 ,  H01M4/00 ,  H01M4/82 ,  H01M6/00 ,  H01M4/36 ,  C01B25/45 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/04 ,  B82Y30/00 ,  C01G49/00 ,  H01M10/052 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/5825 ,  B82Y30/00 ,  C01B25/45 ,  C01G49/009 ,  C01P2002/30 ,  C01P2004/51 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/40 ,  H01M4/0402 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/587 ,  H01M4/625 ,  H01M4/626 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2220/30 ,  Y02P20/544

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 10 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.

公开(公告)号：US09543582B2

公开(公告)日：2017-01-10

申请号：US14510356

申请日：2014-10-09

Applicant: LG Chem, Ltd.

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

IPC: C01B25/45 ,  H01M4/58 ,  H01M4/36 ,  H01M4/04 ,  H01M4/136 ,  H01M4/587 ,  H01M10/052 ,  H01M4/02 ,  H01M4/62

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 triethanolamine solvent, and (b) putting the mixture solution into a reactor and heating to prepare the lithium iron phosphate nanopowder under pressure conditions of 1 bar 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）通过在三乙醇胺溶剂中加入锂前体，铁前体和磷前体制备混合溶液，和（b）将 混合溶液加入到反应器中并加热以在1巴至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。