Patents by Inventor Tae Gu Yoo

Tae Gu Yoo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11450846
    Abstract: The present disclosure relates to a positive electrode material which includes a first positive electrode active material, and a second positive electrode active material in the form of a single particle, wherein an amount of lithium impurities on a surface of the second positive electrode active material is 0.14 wt % or less based on a total weight of the second positive electrode active material, and at least one of nickel, cobalt, and manganese included in the second positive electrode active material has a concentration gradient gradually changing from the center of the particle to a surface thereof, a method of preparing the positive electrode material, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode material.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: September 20, 2022
    Inventors: Young Uk Park, Tae Gu Yoo, Jin Tae Hwang, Wang Mo Jung, Sung Bin Park
  • Patent number: 11424447
    Abstract: A positive electrode active material for a lithium secondary battery is provided having a secondary particle formed by agglomerating a plurality of polycrystalline primary particles including a lithium composite metal oxide of Chemical Formula 1, wherein an average crystallite size of the primary particle is 180 to 400 nm, a particle size D50 of the primary particle is 1.5 to 3?m, and the primary particle is doped or surface-coated with at least one element M selected from the group consisting Al, Ti, Mg, Zr, Y, Sr, and B in an amount of 3,800 to 7,000 ppm: Lia(NixMnyCozAw)O2+b ??[Chemical Formula 1].
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: August 23, 2022
    Inventors: Younguk Park, Tae Gu Yoo, Jintae Hwang, Wang Mo Jung, Sungbin Park
  • Publication number: 20220200005
    Abstract: A conductive agent includes a first particle and a second particle, wherein the first particle includes a secondary particle structure in which graphene sheets are connected to each other, the first particle includes a plurality of graphene sheets arranged in different directions, and the second particle is a carbon nanotube. An electrode including the conductive agent, and a secondary battery including the electrode are also provided.
    Type: Application
    Filed: May 12, 2020
    Publication date: June 23, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Sin Young Park, Bo Ram Lee, Seul Ki Kim, Tae Gu Yoo, Min Kwak
  • Patent number: 11367871
    Abstract: The present invention provides a positive electrode active material for a secondary battery which includes a lithium transition metal oxide, wherein the positive electrode active material has three peaks in a differential graph (ERC curve) obtained by differentiating a pH value against an amount of acid (HCl) added, which is obtained by pH titration of 10 g of the lithium transition metal oxide using 0.5 M HCl, wherein a y-axis (dpH/dml) value of a first peak at the smallest x-axis value among the three peaks is ?1.0 or less.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: June 21, 2022
    Inventors: In Seong Ju, Wang Mo Jung, Byung Chun Park, Joo Hong Jin, Ju Kyung Shin, Ji Hye Kim, So Ra Baek, Tae Gu Yoo
  • Publication number: 20220185691
    Abstract: The present invention provides a positive electrode active material for a secondary battery, which includes a lithium transition metal oxide including nickel (Ni) and cobalt (Co), and at least one selected from the group consisting of aluminum (Al), manganese (Mn), and a combination thereof. The lithium transition metal oxide is characterized in that the content of nickel (Ni) in the total transition metal elements is 80 mol % or more, and the cation mixing ratio of Ni cations in a lithium layer in the lithium transition metal oxide structure is 1.1% or less.
    Type: Application
    Filed: March 8, 2022
    Publication date: June 16, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Ji Hye Kim, Byung Chun Park, So Ra Baek, Tae Gu Yoo, Wang Mo Jung
  • Publication number: 20220158195
    Abstract: An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes a first conductive agent and a second conductive agent, wherein the first conductive agent includes a secondary particle in which a plurality of graphene sheets are arranged in different directions and a portion of one graphene sheet is connected to a portion of adjacent another graphene sheet, the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the electrode is also provided.
    Type: Application
    Filed: September 28, 2020
    Publication date: May 19, 2022
    Applicant: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Sin Young Park, Bo Ram Lee, Hyung Man Cho, Tae Gu Yoo, Min Kwak
  • Patent number: 11299401
    Abstract: The present invention provides a positive electrode active material for a secondary battery, which includes a lithium transition metal oxide including nickel (Ni) and cobalt (Co), and at least one selected from the group consisting of aluminum (Al), manganese (Mn), and a combination thereof. The lithium transition metal oxide is characterized in that the content of nickel (Ni) in the total transition metal elements is 80 mol % or more, and the cation mixing ratio of Ni cations in a lithium layer in the lithium transition metal oxide structure is 1.1% or less.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: April 12, 2022
    Inventors: Ji Hye Kim, Byung Chun Park, So Ra Baek, Tae Gu Yoo, Wang Mo Jung
  • Publication number: 20220037658
    Abstract: A lithium composite transition metal oxide includes nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes two or more kinds of first dopants selected from the group consisting of Zr, Al, V, Co, and Mg and two or more kinds of second dopants selected from the group consisting of Ti, Y, Sr, Nb, Ba, and Ca, and particles of the lithium composite transition metal oxide has a crystallite size of 170-300 nm.
    Type: Application
    Filed: October 21, 2019
    Publication date: February 3, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Sang Min Park, Ji Hye Kim, Tae Gu Yoo, Wang Mo Jung, Gi Beom Han
  • Publication number: 20220020988
    Abstract: The present disclosure relates to a positive electrode additive, a manufacturing method thereof, and a positive electrode and a lithium rechargeable battery including the same. Specifically, one embodiment of the present disclosure provides a positive electrode additive for a lithium rechargeable battery comprising: a compound represented by the following Chemical Formula 1; a compound represented by the following Chemical Formula 2; and lithium phosphate (Li3PO4): Li2+aNibM1?bO2+c ??[Chemical Formula 1] wherein, M is a metal element forming a divalent cation, ?0.2?a?0.2, 0.5?b?1.0, and ?0.2?c?0.2, Ni2?eM1?eP4O12 ??[Chemical Formula 2] wherein, 0.5?e?1.0, and M is the same as defined in Chemical Formula 1.
    Type: Application
    Filed: March 3, 2020
    Publication date: January 20, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Boram Lee, Sin Young Park, Tae Gu Yoo, Taegon Kim, Min Kwak, Wang Mo Jung
  • Publication number: 20220006085
    Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a portion of nickel (Ni) sites of the lithium composite transition metal oxide is substituted with tungsten (W), and an amount of a lithium tungsten oxide remaining on surfaces of lithium composite transition metal oxide particles is 1,000 ppm or less.
    Type: Application
    Filed: September 16, 2021
    Publication date: January 6, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Ji Hye Kim, Byung Chun Park, So Ra Baek, Tae Gu Yoo, Wang Mo Jung
  • Patent number: 11152617
    Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a portion of nickel (Ni) sites of the lithium composite transition metal oxide is substituted with tungsten (W), and an amount of a lithium tungsten oxide remaining on surfaces of lithium composite transition metal oxide particles is 1,000 ppm or less.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: October 19, 2021
    Inventors: Ji Hye Kim, Byung Chun Park, So Ra Baek, Tae Gu Yoo, Wang Mo Jung
  • Patent number: 11121357
    Abstract: The present invention relates to a positive electrode active material for a secondary battery, which includes a core including a lithium composite metal oxide, and a surface treatment layer which is disposed on the core and includes an amorphous oxide containing a lithium (Li) oxide, a boron (B) oxide, and an aluminum (Al) oxide, wherein an amount of a lithium by-product present on a surface of the positive electrode active material is less than 0.55 wt % based on a total weight of the positive electrode active material, and a method of preparing the same.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: September 14, 2021
    Inventors: So Ra Baek, Ji Hye Kim, Tae Gu Yoo, Wang Mo Jung, Byung Chun Park
  • Publication number: 20210020902
    Abstract: A positive electrode active material includes a lithium transition metal oxide, which is doped with doping element M2, wherein M2 is at least one selected from the group consisting of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, and B, and contains nickel in an amount of 60 mol % or more based on a total number of moles of transition metals excluding lithium, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the doping element M2 is included in an amount of 3,580 ppm to 7,620 ppm based on a total weight of the positive electrode active material.
    Type: Application
    Filed: April 1, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Tae Gu Yoo, Young Uk Park, Jin Tae Hwang, Wang Mo Jung, Sung Bin Park
  • Publication number: 20200388830
    Abstract: A positive electrode active material for a secondary battery includes a first positive electrode active material and a second positive electrode active material, wherein an average particle diameter (D50) of the first positive electrode active material is twice or more than an average particle diameter (D50) of the second positive electrode active material, and the second positive electrode active material has a crystallite size of 200 nm or more.
    Type: Application
    Filed: February 1, 2019
    Publication date: December 10, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Dong Hun Lee, Young Uk Park, Wang Mo Jung, Sung Bin Park, Dong Hwi Kim, Tae Gu Yoo
  • Publication number: 20200295367
    Abstract: Exemplary embodiments of positive electrode active materials in the form of single particles, and a method of preparing each of them, are provided. The single particles of the exemplary embodiments include The single particles are single particles of a nickel-based lithium composite metal oxide, having a plurality of crystal grains, each having a size of 180 nm to 300 nm, as analyzed by a Cu K? X-ray (X-r?5). The single particles include a metal doped in the crystal lattice thereof. One embodiment includes a surface coating. The total content of the metal doped in the crystal lattice thereof and the metal of the metal oxide coated on the surface thereof is controlled in the range of 2500 ppm to 6000 ppm.
    Type: Application
    Filed: November 21, 2018
    Publication date: September 17, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Tae Gu Yoo, Younguk Park, Jintae Hwang, Wang Mo Jung, Sungbin Park
  • Publication number: 20200235381
    Abstract: The present disclosure relates to a positive electrode material which includes a first positive electrode active material, and a second positive electrode active material in the form of a single particle, wherein an amount of lithium impurities on a surface of the second positive electrode active material is 0.14 wt % or less based on a total weight of the second positive electrode active material, and at least one of nickel, cobalt, and manganese included in the second positive electrode active material has a concentration gradient gradually changing from the center of the particle to a surface thereof, a method of preparing the positive electrode material, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode material.
    Type: Application
    Filed: September 21, 2018
    Publication date: July 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Young Uk Park, Tae Gu Yoo, Jin Tae Hwang, Wang Mo Jung, Sung Bin Park
  • Publication number: 20200212423
    Abstract: The present disclosure relates to a positive electrode material which includes a first positive electrode active material and a second positive electrode active material, wherein the second positive electrode active material has an electrical conductivity of 0.1 ?S/cm to 150 ?S/cm, which is measured after the second positive electrode active material is prepared in the form of a pellet by compressing the second positive electrode active material at a rolling load of 400 kgf to 2,000 kgf, a method of preparing the positive electrode material, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode material.
    Type: Application
    Filed: September 19, 2018
    Publication date: July 2, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Young Uk Park, Tae Gu Yoo, Jin Tae Hwang, Wang Mo Jung, Sung Bin Park
  • Publication number: 20200161650
    Abstract: Provided is a positive electrode active material for a lithium secondary battery, the positive electrode active material being a secondary particle formed by agglomerating a plurality of polycrystalline primary particles including a lithium composite metal oxide of Chemical Formula 1, wherein an average crystallite size of the primary particle is 180 to 400 nm, an average particle size D50 of the primary particle is 1.5 to 3 ?m, and the primary particle is doped or surface-coated with at least one element M selected from the group consisting Al, Ti, Mg, Zr, Y, Sr, and B in an amount of 3,800 to 7,000 ppm: Lia(NixMnyCozAw)O2+b ??[Chemical Formula 1] in Chemical Formula 1, A, b, x, y, z, and w are the same as defined in the present specification.
    Type: Application
    Filed: November 22, 2018
    Publication date: May 21, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Younguk PARK, Tae Gu YOO, Jintae HWANG, Wang Mo JUNG, Sungbin PARK
  • Publication number: 20200136141
    Abstract: A positive electrode active material for a secondary battery is provided, which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a particle of the lithium composite transition metal oxide includes a core portion and a resistance portion formed on a surface of the core portion, and is composed of a single particle, wherein the core portion has a layered crystal structure of space group R-3m, and the resistance portion has a cubic rock-salt structure of space group Fm-3m.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 30, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Gi Beom Han, Sang Min Park, Ji Hye Kim, Tae Gu Yoo, Wang Mo Jung
  • Publication number: 20200028168
    Abstract: The present invention provides a positive electrode active material for a secondary battery which includes a lithium transition metal oxide, wherein the positive electrode active material has three peaks in a differential graph (ERC curve) obtained by differentiating a pH value against an amount of acid (HCl) added, which is obtained by pH titration of 10 g of the lithium transition metal oxide using 0.5 M HCl, wherein a y-axis (dpH/dml) value of a first peak at the smallest x-axis value among the three peaks is ?1.0 or less.
    Type: Application
    Filed: September 19, 2018
    Publication date: January 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: In Seong Ju, Wang Mo Jung, Byung Chun Park, Joo Hong Jin, Ju Kyung Shin, Ji Hye Kim, So Ra Baek, Tae Gu Yoo