Patents by Inventor Chul Haeng Lee

Chul Haeng Lee 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: 10263284
    Abstract: The present disclosure provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a trimethylsilyl phosphate (TMSPa) additive, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. The non-aqueous liquid electrolyte for a lithium secondary battery of the present disclosure is capable of forming a solid SEI membrane in the negative electrode when initially charging a lithium secondary battery comprising the same, is capable of improving an output property of the lithium secondary battery, and is also capable of enhancing an output property and a capacity property after high temperature storage.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 16, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Young Min Lim, Chul Haeng Lee
  • Patent number: 10243239
    Abstract: Provided are a gel polymer electrolyte including a polymer network, and an electrolyte solution impregnated in the polymer network, wherein the polymer network is formed by combining a first oligomer, which includes unit A derived from a monomer including at least one copolymerizable acrylate or acrylic acid, unit C including urethane, and unit E including siloxane, in a three-dimensional structure, and a lithium secondary battery including the gel polymer electrolyte.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: March 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Jeong Woo Oh, Chul Haeng Lee, Yi Jin Jung, Sol Ji Park
  • Publication number: 20190089004
    Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes an ionizable lithium salt, an organic solvent, and an additive, wherein the additive includes tetravinylsilane, lithium difluorophosphate, and 1,3-propylene sulfate in a weight ratio of 1:3 to 20:3 to 20, and a total amount of the additive is in a range of 1 wt % to 4 wt % based on a total weight of the non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same.
    Type: Application
    Filed: January 18, 2018
    Publication date: March 21, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ha Eun Kim, Young Min Lim, Gwang Yeon Kim, Chul Haeng Lee
  • Publication number: 20190074545
    Abstract: The present invention relates to a non-aqueous electrolyte for lithium secondary battery, and more particularly, to a non-aqueous electrolyte including a lithium salt having a concentration of 4.1 M or more, an organic solvent, and a surfactant.
    Type: Application
    Filed: December 4, 2017
    Publication date: March 7, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Yu Ra Jeong, Kyoung Ho Ahn, Jeong Woo Oh, Sol Ji Park, Chul Haeng Lee
  • Publication number: 20190074538
    Abstract: The present invention relates to a method of preparing a lithium secondary battery which includes preparing a lithium secondary battery, which includes an electrode assembly including a positive electrode, a separator, and a negative electrode, a non-aqueous electrolyte solution, in which the electrode assembly is impregnated, and a battery case accommodating the electrode assembly and the non-aqueous electrolyte solution; performing formation on the lithium secondary battery by charging and discharging the lithium secondary battery; and degassing, wherein the positive electrode includes a positive electrode active material and carbon nanotubes as a conductive agent, the non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and monofluorobenzene as an additive, and the performing of the formation is performed by charging to a state of charge (SOC) of 65% to 80% while applying a pressure of 0.5 kgf/cm2 to 5 kgf/cm2 at 60° C. to 80° C.
    Type: Application
    Filed: January 22, 2018
    Publication date: March 7, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jung Min Lee, Young Min Lim, Chul Haeng Lee, Yu Ha An, Yi Jin Jung
  • Publication number: 20190058216
    Abstract: The present invention relates to an electrolyte for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to an electrolyte for a lithium secondary battery, which includes a lithium salt, an organic solvent, and an oligomer represented by Formula 1 described in the present specification, and a lithium secondary battery in which overall performance is improved by suppressing reactivity with lithium metal by including the electrolyte.
    Type: Application
    Filed: December 8, 2017
    Publication date: February 21, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jeong Woo Oh, Kyoung Ho Ahn, Chul Haeng Lee, Jung Hoon Lee
  • Publication number: 20190058217
    Abstract: The present invention relates to a polymer electrolyte, which includes a lithium salt and a copolymer including a fluorine-substituted or unsubstituted polyalkylene ether repeating unit, and a lithium secondary battery including the same.
    Type: Application
    Filed: September 1, 2017
    Publication date: February 21, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Sol Ji Park, Jung Hoon Lee, Chul Haeng Lee
  • Publication number: 20190051937
    Abstract: The present invention relates to a composition for a gel polymer electrolyte and a gel polymer electrolyte prepared using the same, and specifically provides a composition for a gel polymer electrolyte including a lithium salt, an organic solvent, and a polymer A having an epoxy group represented by Formula 1, and a polymer B having an amine group and a cyanide group represented by Formula 2, wherein the polymers A and B are included in an amount of 1 to 20 wt % based on the total weight of the composition for a gel polymer electrolyte, and wherein a gel polymer electrolyte for a secondary battery can be prepared that includes a polymer network formed by combining the polymer A having an epoxy group represented by Formula 1 and the polymer B having an amine group and a cyanide group represented by Formula 2 in a three-dimensional structure.
    Type: Application
    Filed: March 30, 2017
    Publication date: February 14, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung Ho AHN, Jung Hoon LEE, Chul Haeng LEE, Jeong Woo OH, Yi Jin JUNG, Sol Ji PARK
  • Publication number: 20190036155
    Abstract: The present invention provides an electrolyte solution for a lithium secondary battery including an additive, which may prevent a chemical reaction between the electrolyte solution and an electrode by forming a stable solid electrolyte interface (SEI) and a protection layer on the surface of the electrode, and a lithium secondary battery in which life characteristics and high-temperature stability are improved by including the same.
    Type: Application
    Filed: October 13, 2017
    Publication date: January 31, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Yu Ra Jeong, Chul Haeng Lee, Young Min Lim, Jeong Woo Oh, Jung Hoon Lee
  • Publication number: 20190036162
    Abstract: The present invention relates to a composition for a gel polymer electrolyte, in which liquid injection characteristics at room temperature and in an oxygen atmosphere are improved by including a non-fluoride oxygen scavenger as well as a polymerizable oligomer having a polymerizable substituent, and a lithium secondary battery in which capacity retention with cycles is excellent by including a gel polymer electrolyte which is formed by using the composition.
    Type: Application
    Filed: July 23, 2018
    Publication date: January 31, 2019
    Inventors: Jeong Woo Oh, Kyoung Ho Ahn, Chul Haeng Lee
  • Publication number: 20190020063
    Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes an ionizable lithium salt, an organic solvent, and an additive, wherein the additive is a mixed additive which includes lithium difluorophosphate, tertiary alkylbenzene, and tetra-vinyl silane in a weight ratio of 1:1 to 4:0.05 to 0.5, and the additive is included in an amount of 2.5 wt % to 4.5 wt % based on a total weight of the non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same.
    Type: Application
    Filed: November 15, 2017
    Publication date: January 17, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Gwang Yeon Kim, Young Min Lim, Ha Eun Kim, Chul Haeng Lee
  • Publication number: 20190006703
    Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery that includes an additive for forming a stable SEI film and a protective layer on a surface of an electrode to prevent a chemical reaction between the electrolyte solution and the electrode, and a lithium secondary battery having improved life characteristics and high-temperature stability by including the same.
    Type: Application
    Filed: August 19, 2016
    Publication date: January 3, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Chul Haeng Lee, Yi Jin Jung, Jung Hoon Lee
  • Publication number: 20180342767
    Abstract: The present invention relates to a gel polymer electrolyte, which includes a matrix polymer and an electrolyte solution impregnated in the matrix polymer, wherein the matrix polymer is formed in a three-dimensional network structure by polymerizing a first oligomer which includes unit A represented by Formula 1 and unit B having a crosslinkable functional group derived from a compound including at least one copolymerizable acrylate group, and a lithium secondary battery including the same.
    Type: Application
    Filed: September 1, 2017
    Publication date: November 29, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Jung Hoon Lee, Jeong Woo Oh, Chul Haeng Lee
  • Patent number: 10135095
    Abstract: Disclosed is a lithium secondary battery including: (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; (ii) an anode active material including amorphous carbon; and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether based solvent, wherein propylene carbonate (PC) is included in an amount of 1 wt % to 60 wt % in the electrolyte for lithium secondary batteries, based on the total weight of the electrolyte, Li1+aM(PO4?b)Xb??(1) wherein M is at least one selected from metals of Groups II to XII; X is at least one selected from F, S and N, ?0.5?a?+0.5, and 0?b?0.1.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 20, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Yourim Yoon, Jong Mo Jung, Jonghyun Chae, Chul Haeng Lee, Geun Chang Chung, Young Cheol Choi, Young Geun Choi, Seung Jae Yoon
  • Patent number: 10128540
    Abstract: Disclosed is a lithium secondary battery including: (i) a cathode active material including a lithium metal phosphate according to Formula 1 below; (ii) an anode active material including amorphous carbon; and (iii) an electrolyte for lithium secondary batteries including a lithium salt and an ether based solvent, wherein propylene carbonate (PC) is included in an amount of 1 wt % to 60 wt % in the electrolyte for lithium secondary batteries, based on the total weight of the electrolyte, Li1+aM(PO4-b)Xb??(1) wherein M is at least one selected from metals of Groups II to XII; X is at least one selected from F, S and N, ?0.5?a?+0.5, and 0?b?0.1.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: November 13, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Yourim Yoon, Jong Mo Jung, Jonghyun Chae, Chul Haeng Lee, Geun Chang Chung, Young Cheol Choi, Young Geun Choi, Seung Jae Yoon
  • Publication number: 20180323471
    Abstract: Disclosed is a secondary battery including an electrode assembly, which includes a cathode, an anode and a separator interposed therebetween, and an electrolyte, wherein the anode includes lithium titanium oxide (LTO) as an anode active material and the electrolyte contains a phosphate-based compound as an additive.
    Type: Application
    Filed: July 11, 2018
    Publication date: November 8, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Kyoung-Ho Ahn, Chul-Haeng Lee, Doo-Kyung Yang, Jong-Ho Jeon, Yoo-Seok Kim, Min-Jung Kim, Jung-Hoon Lee, Yi-Jin Jung
  • Patent number: 10109862
    Abstract: Disclosed are an anode for secondary batteries and a secondary battery including the same. The anode includes an anode mixture including an anode active material, coated on a current collector, wherein the anode active material includes lithium titanium oxide (LTO) particles provided on surfaces thereof with a cross-linked polymer coating layer, wherein the LTO particles with the cross-linked polymer coating layer formed thereon retain a porous structure formed therebetween, and a cross-linked polymer of the coating layer is a phosphate-based compound.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: October 23, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Kyoung-Ho Ahn, Chul-Haeng Lee, Doo-Kyung Yang, Min-Jung Kim, Jung-Hoon Lee, Yi-Jin Jung
  • Patent number: 10090559
    Abstract: Provided are a non-aqueous electrolyte including a non-aqueous organic solvent, a lithium salt, and a borate-based compound, and a lithium secondary battery using the same. According to the present invention, a lithium secondary battery having improved cycle characteristics and high-temperature storage stability may be prepared by including a non-aqueous electrolyte which includes at least one borate-based compound as an additive.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: October 2, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Kyoung Ho Ahn, Chul Haeng Lee, Yoo Seok Kim, Doo Kyung Yang, Young Min Lim, Jung Hoon Lee
  • Patent number: 10090560
    Abstract: The present invention relates to a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated ether compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode and a separator. According to a non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a rigid SEI layer may be formed at a negative electrode during the initial charging of the lithium secondary battery comprising the same, the output properties of the lithium secondary battery may be improved, and the output properties after storing at high temperature and capacity properties may be increased.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 2, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Shul Kee Kim, Chul Haeng Lee, Young Min Lim, Gwang Yeon Kim
  • Publication number: 20180261885
    Abstract: The present invention relates to: a nonaqueous electrolyte having an excellent swelling suppressing effect during high-temperature storage; and a lithium secondary battery including the same.
    Type: Application
    Filed: November 15, 2016
    Publication date: September 13, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Yeong Lee, Hyea Eun Han, Chul Haeng Lee, Yu Ra Jeong