Patents by Inventor Rae Hwan Jo

Rae Hwan Jo 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).

  • Publication number: 20200220167
    Abstract: A method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof includes (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in step (1).
    Type: Application
    Filed: January 10, 2020
    Publication date: July 9, 2020
    Applicants: LG Chem, Ltd., Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Ye Ri Kim, Yong Mook Kang, Mi Ru Jo, Eun Kyung Kim, Yong Ju Lee, Rae Hwan Jo
  • Publication number: 20200176753
    Abstract: A negative electrode for a lithium secondary battery (and a lithium secondary battery including the same) including: a negative electrode current collector; a first negative electrode mixture layer present on at least one surface of the negative electrode current collector and including a first carbonaceous negative electrode active material, a first polymer binder and a first conductive material; a second negative electrode mixture layer present on a top surface of the first negative electrode mixture layer and including a silicon-based negative electrode active material, a second polymer binder and a second conductive material; and a third negative electrode mixture layer present on a top surface of the second negative electrode mixture layer and including a second carbonaceous negative electrode active material, a third polymer binder and a third conductive material.
    Type: Application
    Filed: February 11, 2020
    Publication date: June 4, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Su-Min LEE, Yong-Ju LEE, Eun-Kyung KIM, Sun-Young SHIN, Il-Geun OH, Rae-Hwan JO
  • Publication number: 20200168890
    Abstract: A negative electrode active material which includes a secondary particle including first primary particles, wherein the first primary particle includes a core including SiOx, wherein 0?x<2, an intermediate layer which covers at least a portion of a surface of the core and includes silicon nitride, silicon oxynitride, or a mixture thereof, and a carbon coating layer which covers at least a portion of the intermediate layer and includes nitrogen-doped carbon, and a negative electrode and a lithium secondary battery which include the same.
    Type: Application
    Filed: May 10, 2018
    Publication date: May 28, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Dong Hyuk KIM, Eun Kyung KIM, Rae Hwan JO, Il Geun OH
  • Patent number: 10637064
    Abstract: The present invention relates to a method for manufacturing a conductor, and a lithium secondary battery including a conductor manufactured using the manufacturing method, and the method for manufacturing a conductor includes removing metal impurities in a conductor by irradiating microwave on the conductor including the metal impurities and converting the metal impurities into metal oxides. A conductor manufactured using the manufacturing method converts metal impurities included in the conductor to metal oxides that are inactive at a battery operating voltage and not eluted in an electrolyte liquid, and therefore, is capable of enhancing battery performance properties, particularly, capacity and lifespan properties without concern of metal impurity elution and a defect occurrence under a low pressure caused therefrom.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: April 28, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Ji Hoon Ryu, Dong Myung Kim, Ki Tae Kim, Rae Hwan Jo
  • Patent number: 10637051
    Abstract: Provided are a negative electrode active material for a lithium secondary battery and a method of preparing the same, wherein since the negative electrode active material includes porous polycrystalline silicon and the porous polycrystalline silicon includes pores disposed at grain boundaries, the negative electrode active material may exhibit a buffering action by internally absorbing changes in volume of the active material during charge and discharge. As a result, lifetime characteristics of a negative electrode and a battery may be improved.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: April 28, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Rae Hwan Jo, Ju Ho Chung, Eun Kyung Kim, Yong Ju Lee, Seung Youn Choi, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20200099052
    Abstract: A negative electrode active material including silicon-based active material particles each including a core including SiOx, wherein 0?x?2, and a coating layer present on the core. Also, a negative electrode active material in which the coating layer is any one of a carbon coating layer or a polymer coating layer, and the coating layer includes a fluorinated material including at least one of an alkali metal or an alkaline earth metal.
    Type: Application
    Filed: November 26, 2019
    Publication date: March 26, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM, Rae Hwan JO, Dong Hyuk KIM, Il Geun OH
  • Publication number: 20200067088
    Abstract: A negative electrode active material as well as a method of preparing a negative electrode active material which includes preparing a silicon-based compound including SiOx, wherein 0.5<x<1.3; disposing a polymer layer including a polymer compound on the silicon-based compound; disposing a metal catalyst layer on the polymer layer; heat treating the silicon-based compound on which the polymer layer and the metal catalyst layer are disposed; and removing the metal catalyst layer, wherein the polymer compound includes any one selected from the group consisting of glucose, fructose, galactose, maltose, lactose, sucrose, a phenolic resin, a naphthalene resin, a polyvinyl alcohol resin, a urethane resin, polyimide, a furan resin, a cellulose resin, an epoxy resin, a polystyrene resin, a resorcinol-based resin, a phloroglucinol-based resin, a coal-derived pitch, a petroleum-derived pitch, a tar and a mixture of two or more thereof.
    Type: Application
    Filed: November 1, 2019
    Publication date: February 27, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Dong Hyuk KIM, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO, Jung Hyun CHOI
  • Patent number: 10511048
    Abstract: The present invention relates to a method of preparing a negative electrode active material for a secondary battery which may prevent oxidation during the preparation of nano-sized silicon particles, a negative electrode active material for a secondary battery prepared thereby, and a negative electrode for a secondary battery and a lithium secondary battery including the same.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: December 17, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Rae Hwan Jo, Yong Ju Lee, Eun Kyung Kim
  • Publication number: 20190288281
    Abstract: A negative electrode active material including a core having SiOx (0?x<2), an intermediate layer covering at least a portion of a surface of the core and including at least one of silicon nitride or silicon oxynitride, and a carbon coating layer covering at least a portion of the intermediate layer and containing nitrogen.
    Type: Application
    Filed: February 26, 2018
    Publication date: September 19, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Dong Hyuk KIM, Yong Ju LEE, Eun Kyung KIM, Rae Hwan JO
  • Patent number: 10290860
    Abstract: Provided are a composite for an anode active material and a method of preparing the same. More particularly, the present invention provides a composite for an anode active material including a (semi) metal oxide and an amorphous carbon layer on a surface of the (semi) metal oxide, wherein the amorphous carbon layer comprises a conductive agent, and a method of preparing the composite.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: May 14, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Ah Kang, Yong Ju Lee, Rae Hwan Jo, Je Young Kim
  • Patent number: 10153484
    Abstract: Provided are a porous silicon-based anode active material including a core part including silicon (Si) and MxSiy, and a shell part including Si and a plurality of pores on the core part, wherein, in the MxSiy, M is at least one element selected from the group consisting of Group 2A, 3A, and 4A elements and transition metals, 1?x?4, and 1?y?4, and a method of preparing the porous silicon-based anode active material. According to an embodiment of the present invention, capacity characteristics and lifetime characteristic of a lithium secondary battery may be improved by minimizing the volume expansion of an anode active material during charge and discharge.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: December 11, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Yong Ju Lee, Jun Sik Ham, Sung Man Lee, Rae Hwan Jo, Eun Kyung Kim, Je Young Kim, Hong Kyu Park, Jung Woo Yoo, Mi Rim Lee
  • Publication number: 20180351160
    Abstract: The present invention relates to silicon-based active material-polymer composite which is secondary particles in which silicon-based particles as primary particles and conductive polymer particles having a modulus of elasticity of 10 Pa to 100 Pa at a temperature of 20° C. to 40° C. are uniformly mixed.
    Type: Application
    Filed: March 8, 2017
    Publication date: December 6, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Rae Hwan Jo, Eun Kyung Kim, Yong Ju Lee, Su Jin Park, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20180269519
    Abstract: The present invention relates to a method of preparing a negative electrode active material for a secondary battery which may prevent oxidation during the preparation of nano-sized silicon particles, a negative electrode active material for a secondary battery prepared thereby, and a negative electrode for a secondary battery and a lithium secondary battery including the same.
    Type: Application
    Filed: December 9, 2016
    Publication date: September 20, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Rae Hwan JO, Yong Ju LEE, Eun Kyung KIM
  • Publication number: 20180026261
    Abstract: The present invention relates to a lithium metal oxide having a nickel oxide layer formed on a surface thereof, and represented by Formula 1; and the lithium metal oxide can be prepared by a method of preparing a lithium metal oxide having a nickel oxide layer formed on a surface thereof, the method comprising steps of: (1) complexing a nickel precursor onto a surface of a lithium metal oxide; and (2) calcining, through a heat treatment, the lithium metal oxide—the surface of which is complexed with the nickel precursor—obtained in Step (1).
    Type: Application
    Filed: March 10, 2016
    Publication date: January 25, 2018
    Applicants: LG Chem, Ltd., Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Ye Ri KIM, Yong Mook KANG, Mi Ru JO, Eun Kyung KIM, Yong Ju LEE, Rae Hwan JO
  • Patent number: 9806335
    Abstract: Provided are a composite and a method of preparing an anode slurry including the same. More particularly, the present invention provides a composite including a (semi) metal oxide, a conductive material on a surface of the (semi) metal oxide, and a binder, and a method of preparing an anode slurry including preparing a composite by dispersing a conductive material in an aqueous binder and then mixing with a (semi) metal oxide, and mixing the composite with a carbon material and a non-aqueous binder.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: October 31, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Ah Kang, Yong Ju Lee, Rae Hwan Jo, Je Young Kim
  • Publication number: 20170309902
    Abstract: Provided are a negative electrode active material for a lithium secondary battery and a method of preparing the same, wherein since the negative electrode active material includes porous polycrystalline silicon and the porous polycrystalline silicon includes pores disposed at grain boundaries, the negative electrode active material may exhibit a buffering action by internally absorbing changes in volume of the active material during charge and discharge. As a result, lifetime characteristics of a negative electrode and a battery may be improved.
    Type: Application
    Filed: October 1, 2015
    Publication date: October 26, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Rae Hwan Jo, Ju Ho Chung, Eun Kyung Kim, Yong Ju Lee, Seung Youn Choi, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20170237073
    Abstract: The present invention relates to a method for manufacturing a conductor, and a lithium secondary battery including a conductor manufactured using the manufacturing method, and the method for manufacturing a conductor includes removing metal impurities in a conductor by irradiating microwave on the conductor including the metal impurities and converting the metal impurities into metal oxides. A conductor manufactured using the manufacturing method converts metal impurities included in the conductor to metal oxides that are inactive at a battery operating voltage and not eluted in an electrolyte liquid, and therefore, is capable of enhancing battery performance properties, particularly, capacity and lifespan properties without concern of metal impurity elution and a defect occurrence under a low pressure caused therefrom.
    Type: Application
    Filed: October 22, 2015
    Publication date: August 17, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Ji Hoon Ryu, Dong Myung Kim, Ki Tae Kim, Rae Hwan Jo
  • Publication number: 20170222222
    Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the negative electrode active material, wherein since the negative electrode active material includes a surface-treated silicon nanoparticle and the surface-treated silicon nanoparticle includes a silicon nanoparticle and a surface treatment layer which is disposed on a surface of the silicon nanoparticle and includes crystalline SiO2, the negative electrode active material may exhibit significantly improved initial efficiency characteristics as well as excellent lifetime and capacity characteristics when used in a battery.
    Type: Application
    Filed: October 1, 2015
    Publication date: August 3, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Yong Ju Lee, Seung Youn Choi, Rae Hwan Jo, Eun Kyung Kim, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20170133663
    Abstract: Provided are a composite for an anode active material and a method of preparing the same. More particularly, the present invention provides a composite for an anode active material including a (semi) metal oxide and an amorphous carbon layer on a surface of the (semi) metal oxide, wherein the amorphous carbon layer comprises a conductive agent, and a method of preparing the composite.
    Type: Application
    Filed: January 19, 2017
    Publication date: May 11, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Yoon Ah Kang, Yong Ju Lee, Rae Hwan Jo, Je Young Kim
  • Patent number: 9590238
    Abstract: Provided are a composite for an anode active material and a method of preparing the same. More particularly, the present invention provides a composite for an anode active material including a (semi) metal oxide and an amorphous carbon layer on a surface of the (semi) metal oxide, wherein the amorphous carbon layer comprises a conductive agent, and a method of preparing the composite.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: March 7, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Yoon Ah Kang, Yong Ju Lee, Rae Hwan Jo, Je Young Kim