Patents by Inventor Hyun Jong YU

Hyun Jong YU 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: 11643337
    Abstract: The present invention relates to a lithium composite oxide, a positive electrode active material for a lithium secondary battery including the lithium composite oxide, and a lithium secondary battery using a positive electrode including the positive electrode active material.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 9, 2023
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Gyeong Jae Heo, Hyun Jong Yu, Seung Hyun Choi
  • Publication number: 20230126235
    Abstract: A lithium complex oxide and method of manufacturing the same, more particularly, a lithium complex oxide effective in improving the characteristics of capacity, resistance, and lifetime with reduced residual lithium and with different interplanar distances of crystalline structure between a primary particle locating in an internal part of secondary particle and a primary particle locating on the surface part of the secondary particle, and a method of preparing the same.
    Type: Application
    Filed: October 13, 2022
    Publication date: April 27, 2023
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Moon Ho CHOI, Jong Seung SHIN, Dong Hee KIM, Suk Yong JEON, Hyun Jong YU, Kyoung Jun LEE, Young Nam PARK
  • Publication number: 20230121699
    Abstract: The present invention relates to a positive electrode active material for a lithium secondary battery which can simultaneously improve electrochemical properties and stability, which are in a mutual trade-off relationship, by introducing a step structure to a surface part of a lithium composite oxide constituting the positive electrode active material, and a lithium secondary battery including the same.
    Type: Application
    Filed: December 9, 2022
    Publication date: April 20, 2023
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Bo Hyun KONG, Moon Ho CHOI, Hyun Jong YU, Kyung Gu KIM, Su Jin KIM, Min Su JO, Yeon Hee KIM, Jong Seung SHIN, Jin Kyeong YUN, Hwan Wook KWAK
  • Patent number: 11631849
    Abstract: The present invention relates to a lithium composite oxide having improved stability and electrical characteristics as a positive electrode material by inhibiting an interfacial side reaction in the lithium composite oxide and improving the stability of a crystal structure and ion conductivity, and a lithium secondary battery including the same.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: April 18, 2023
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Hyun Jong Yu, Chang Woo Lee, Yu Kyung Chun
  • Publication number: 20230111400
    Abstract: The present invention relates to a positive electrode active material which includes a lithium composite oxide with improved electrochemical properties and stability and a lithium secondary battery including the same, and more particularly, to a positive electrode active material which is improved in electrochemical characteristics and stability by removing at least a part of a coating layer present on the surface of the lithium composite oxide and lithium-containing impurities, and a lithium secondary battery including the same.
    Type: Application
    Filed: December 9, 2022
    Publication date: April 13, 2023
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Chang Woo LEE, Moon Ho CHOI, Hyun Jong YU, Young Nam PARK, Jung Bae PARK, Jae Woo JEON
  • Publication number: 20230106467
    Abstract: The present invention relates to a positive electrode active material with improved electrochemical properties and stability and a lithium secondary battery using a positive electrode comprising the same, wherein secondary particles formed by aggregation of a plurality of primary particles are provided as aggregates of primary particles in which a concentration gradient of the doping metal is formed from a grain boundary between the primary particles toward a center portion of the primary particle.
    Type: Application
    Filed: September 21, 2022
    Publication date: April 6, 2023
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Chae Won MOON, Jung Bae PARK, Moon Ho CHOI, Hyun Jong YU
  • Publication number: 20230067781
    Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.
    Type: Application
    Filed: October 11, 2022
    Publication date: March 2, 2023
    Inventors: Moon Ho CHOI, Jong Hwan PARK, Gyeong Jae HEO, Hyun Jong YU, Yonghwan GWON, Young Nam PARK, Eun Byeol HYEONG
  • Patent number: 11581522
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: February 14, 2023
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Gyeong Jae Heo, Hyun Jong Yu, Seung Hyun Choi
  • Patent number: 11508960
    Abstract: The present invention relates to a lithium metal complex oxide and a preparation method thereof, and more particularly, to a lithium metal complex oxide mixed with a metal compound for a lithium reaction, stirred and heat-treated to allow residual lithium and a metal compound for reducing lithium (or a metal compound for lithium reduction) to react with each other on a surface to form a product, which is included in the lithium metal complex oxide, in which the content of Ni3+ is higher than the content of Ni2+ and a ratio of Ni3+/Ni2+ is 1.5 or greater so that life characteristics and capacity characteristics are improved, while residual lithium is reduced, and a preparation method thereof.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: November 22, 2022
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Jong Hwan Park, Gyeong Jae Heo, Hyun Jong Yu, Yonghwan Gwon, Young Nam Park, Eun Byeol Hyeong
  • Patent number: 11508964
    Abstract: Disclosed is a lithium complex oxide and method of manufacturing the same, more particularly, a lithium complex oxide effective in improving the characteristics of capacity, resistance, and lifetime with reduced residual lithium and with different interplanar distances of crystalline structure between a primary particle locating in an internal part of secondary particle and a primary particle locating on the surface part of the secondary particle, and a method of preparing the same.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: November 22, 2022
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Jong Seung Shin, Dong Hee Kim, Suk Yong Jeon, Hyun Jong Yu, Kyoung Jun Lee, Young Nam Park
  • Patent number: 11502297
    Abstract: Disclosed is a lithium complex oxide and method of manufacturing the same, more particularly, a lithium complex oxide effective in improving the characteristics of capacity, resistance, and lifetime with reduced residual lithium and with different interplanar distances of crystalline structure between a primary particle locating in an internal part of secondary particle and a primary particle locating on the surface part of the secondary particle, and a method of preparing the same.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: November 15, 2022
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Jong Seung Shin, Dong Hee Kim, Suk Yong Jeon, Hyun Jong Yu, Kyoung Jun Lee, Young Nam Park
  • Publication number: 20220115658
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a positive electrode active material which exhibits a predetermined peak intensity ratio and a predetermined voltage ratio in a graph illustrating the voltage (V) and the battery capacity (Q) at the 3rd cycle and having an X axis indicating the voltage (V) and a Y axis indicating a value (dQ/dV) obtained by differentiating the battery capacity (Q) with respect to the voltage (V) when charging/discharging is performed under predetermined conditions, and a lithium secondary battery including the same.
    Type: Application
    Filed: July 20, 2021
    Publication date: April 14, 2022
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Jung Bae PARK, Hyun Jong YU, Moon Ho CHOI
  • Publication number: 20220115657
    Abstract: The present invention relates to a positive electrode active material having improved electrochemical characteristics and improved stability, and a lithium secondary battery using a positive electrode including the positive electrode active material, and more particularly, to a positive electrode active material which may prevent decreases in electrochemical characteristics and stability of the positive electrode active material, which are caused by Li impurities, in advance by controlling the content of the Li impurities remaining on the surface of the positive electrode active material without a washing process to reduce the amount of residual lithium present on the surface thereof, and a lithium secondary battery using a positive electrode containing the positive electrode active material.
    Type: Application
    Filed: June 23, 2021
    Publication date: April 14, 2022
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Chang Woo LEE, Hyun Jong YU, Moon Ho CHOI
  • Publication number: 20220069289
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery including the same, and more particularly, to a bimodal-type positive electrode active material including a first lithium composite oxide, which is a small particle, and a second lithium composite oxide, which is a large particle, these particles having different particle diameters, wherein the positive electrode active material makes it possible to prevent deterioration in electrochemical properties and stability thereof, which are generated due to non-uniform formation of a coating layer at least partially coating surfaces of the small and large particles, a positive electrode including the positive electrode active material, and a lithium secondary battery using the same.
    Type: Application
    Filed: June 23, 2021
    Publication date: March 3, 2022
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Jung Bae PARK, Hyun Jong YU, Moon Ho CHOI
  • Publication number: 20220069294
    Abstract: The present invention relates to a positive electrode active material having improved electrochemical characteristics and improved stability, and a lithium secondary battery using a positive electrode including the positive electrode active material, and more particularly, to a positive electrode active material which may prevent decreases in electrochemical characteristics and stability of the positive electrode active material, which are caused by Li impurities, in advance by controlling the content of the Li impurities remaining on the surface of the positive electrode active material without a washing process to reduce the amount of residual lithium present on the surface thereof, and a lithium secondary battery using a positive electrode containing the positive electrode active material.
    Type: Application
    Filed: June 16, 2021
    Publication date: March 3, 2022
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Chang Woo LEE, Moon Ho CHOI, Hyun Jong YU
  • Patent number: 11165061
    Abstract: The present invention relates to a method of preparing a positive electrode active material for a lithium secondary battery and the positive electrode active material for the lithium secondary battery prepared thereby, and more specifically, to a method of preparing a positive electrode active material for a lithium secondary battery, the method comprising doping or coating the positive electrode active material for the lithium secondary battery with a predetermined metal oxide, and the positive electrode active material for the lithium secondary battery which is prepared thereby and has a reduced amount of residual lithium.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: November 2, 2021
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Jong Seung Shin, Suk Yong Jeon, Hyun Jong Yu, Young Nam Park
  • Publication number: 20210309537
    Abstract: The present invention relates to a lithium composite oxide, a positive electrode active material for a lithium secondary battery including the lithium composite oxide, and a lithium secondary battery using a positive electrode including the positive electrode active material.
    Type: Application
    Filed: June 22, 2021
    Publication date: October 7, 2021
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Moon Ho CHOI, Gyeong Jae HEO, Hyun Jong YU, Seung Hyun CHOI
  • Publication number: 20210305558
    Abstract: The present invention relates to a positive electrode active material which has the structural stability of a lithium composite oxide constituting a positive electrode active material and a lithium secondary battery including the same. The lithium composite oxide constituting the positive electrode active material according to the present invention is able to reduce the surface area and grain boundary of secondary particles having a side reaction with an electrolyte solution, thereby improving high-temperature stability and reducing gas generation caused by the positive electrode active material, and the structural stability of the lithium composite oxide may be improved using a cation-mixing layer covering the surface of a primary particle.
    Type: Application
    Filed: November 13, 2020
    Publication date: September 30, 2021
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Moon Ho CHOI, Hyun Jong YU, Jung Bae PARK
  • Publication number: 20210288309
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 16, 2021
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Moon Ho CHOI, Gyeong Jae HEO, Hyun Jong YU, Seung Hyun CHOI
  • Patent number: 11078089
    Abstract: The present invention relates to a lithium composite oxide, a positive electrode active material for a lithium secondary battery including the lithium composite oxide, and a lithium secondary battery using a positive electrode including the positive electrode active material.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: August 3, 2021
    Assignee: ECOPRO BM CO., LTD.
    Inventors: Moon Ho Choi, Gyeong Jae Heo, Hyun Jong Yu, Seung Hyun Choi