Patents by Inventor Sumihito Ishida

Sumihito Ishida 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: 10879524
    Abstract: A positive electrode for a rechargeable lithium battery, includes a current collector including pores on a surface thereof; and a positive active material layer on the current collector and including a positive active material, the positive active material including a lithium metal compound including primary particles and secondary particles including agglomerations of the primary particles, an average diameter of the pores of the current collector being greater than an average particle diameter (D50) of the primary particles and less than an average particle diameter (D50) of the secondary particles.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: December 29, 2020
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Jeong-Woo Han, Sumihito Ishida, Jung-Woo An
  • Patent number: 10826053
    Abstract: A positive electrode for a rechargeable lithium battery, includes a current collector including pores on a surface thereof; and a positive active material layer on the current collector and including a positive active material, the positive active material including a lithium metal compound including primary particles and secondary particles including agglomerations of the primary particles, an average diameter of the pores of the current collector being greater than an average particle diameter (D50) of the primary particles and less than an average particle diameter (D50) of the secondary particles.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 3, 2020
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Jeong-Woo Han, Sumihito Ishida, Jung-Woo An
  • Publication number: 20200243841
    Abstract: An anode, which includes a current collector and an anode material stack coated on the current collector, the anode material stack includes an anode active material layer, which includes porous carbon material and a first binder, and the porous carbon material is mixed with the binder. The anode material stack further includes a carbon intermediate layer sandwiched between the current collector and the anode active material layer. It also provides a method for preparing the anode. Further, it provides a lithium ion battery including the anode above.
    Type: Application
    Filed: August 17, 2017
    Publication date: July 30, 2020
    Inventors: SHENGCHEN YANG, KAIQIANG WU, ZHUOQUN ZHENG, XIANG LI, SUMIHITO ISHIDA, WENJUAN LIU MATTIS
  • Publication number: 20200028180
    Abstract: The present disclosure provides an anode, which includes a current collector and a carbon fiber layer that is coated onto the current collector and includes oxygen-containing functional groups. The present disclosure also provides a method for preparing the anode, especially preparing the carbon fiber layer. In addition, the present disclosure provides a lithium ion secondary battery including the anode above.
    Type: Application
    Filed: December 18, 2016
    Publication date: January 23, 2020
    Inventors: SUMIHITO ISHIDA, SHENGCHEN YANG, WENJUAN LIU MATTIS, ZHUOQUN ZHENG, XIANG LI, YANG WU
  • Patent number: 10224538
    Abstract: In an aspect, a positive electrode for a lithium rechargeable battery including a current collector; a positive active material layer disposed on the current collector, wherein the positive active material layer includes a positive active material, active carbon, and an additive.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: March 5, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jeong-Woo Han, Young-Kee Kim, Sun-Il Park, Sumihito Ishida
  • Patent number: 10193140
    Abstract: A positive electrode for a rechargeable lithium battery includes a positive active material and activated carbon, wherein an average particle diameter of the activated carbon is about 100% to about 160% relative to 100% of an average particle diameter of the positive active material.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: January 29, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Woo An, Kyeu-Yoon Sheem, Sumihito Ishida
  • Patent number: 10074848
    Abstract: A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: September 11, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Woo An, Sumihito Ishida, Joon-Kil Son
  • Patent number: 10038180
    Abstract: A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: July 31, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Woo An, Sumihito Ishida, Joon-Kil Son
  • Patent number: 9917292
    Abstract: A battery cell includes a first electrode terminal, a second electrode terminal spaced from the first electrode terminal, and at least one sub terminal coupled to one of the first electrode terminal or the second electrode terminal. The at least one sub terminal includes at least one convex area and at least two concave areas. Each of the convex area and the at least two concave areas to establish an electrical connection with an electrode terminal of adjacent battery cells.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: March 13, 2018
    Assignee: Samsung SDI., Ltd.
    Inventors: Jin Kim, Jin-Man Jeoung, Sumihito Ishida
  • Patent number: 9853320
    Abstract: The positive active material for a rechargeable lithium battery includes a composite material of a microporous carbon-based material and a lithium composite compound and a carbon layer on the surface of the composite material.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: December 26, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Kyeu-Yoon Sheem, Sumihito Ishida, Bok-Hyun Ka
  • Patent number: 9490502
    Abstract: An electrolyte for a rechargeable lithium battery, the electrolyte including a lithium salt, a non-aqueous organic solvent, a first additive represented by Chemical Formula 1, and a second additive represented by Chemical Formula 2 is disclosed. A rechargeable lithium battery including the electrolyte is also disclosed. The structures and definitions of the Chemical Formulae 1 and 2 are the same as described in the detailed description.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: November 8, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sun-Il Park, Young-Kee Kim, Sumihito Ishida
  • Patent number: 9419305
    Abstract: An electrolyte for rechargeable lithium battery includes a lithium salt, a non-aqueous organic solvent, a first additive represented by the following Chemical Formula 1, and a second additive represented by the following Chemical Formula 2. A rechargeable lithium battery includes the electrolyte.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: August 16, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Yeon-Joo Choi, Young-Kee Kim, Sumihito Ishida
  • Patent number: 9356283
    Abstract: In an aspect, a positive active material for a rechargeable lithium battery that includes a first positive active material; and a second positive active material including LiaMn1-xMxO2 (M is selected from Co, Ni, Mn, Fe. Cu, V, Si, Al, Sn, Pb, Sn, Ti, Sr, Mg, Ca or a combination thereof; x is 0?x?1.0; and a is 0.9?a?1.1) is disclosed.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: May 31, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Woo An, Sumihito Ishida
  • Patent number: 9306212
    Abstract: A positive active material for a rechargeable lithium battery includes a porous material including primary particles, and secondary particles including aggregates of a plurality of the primary particles. The porous material has a tap density of 0.3 to less than 1.0 g/cc. A positive electrode includes the positive active material. A rechargeable lithium battery includes the positive electrode including the positive active material.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: April 5, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sumihito Ishida, Jung-Woo An, Young-Kee Kim, Jin-Man Jeoung
  • Publication number: 20160087261
    Abstract: A positive electrode for a rechargeable lithium battery, includes a current collector including pores on a surface thereof; and a positive active material layer on the current collector and including a positive active material, the positive active material including a lithium metal compound including primary particles and secondary particles including agglomerations of the primary particles, an average diameter of the pores of the current collector being greater than an average particle diameter (D50) of the primary particles and less than an average particle diameter (D50) of the secondary particles.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 24, 2016
    Inventors: Jeong-Woo HAN, Sumihito ISHIDA, Jung-Woo AN
  • Publication number: 20160036031
    Abstract: A battery cell includes a first electrode terminal, a second electrode terminal spaced from the first electrode terminal, and at least one sub terminal coupled to one of the first electrode terminal or the second electrode terminal. The at least one sub terminal includes at least one convex area and at least two concave areas. Each of the convex area and the at least two concave areas to establish an electrical connection with an electrode terminal of adjacent battery cells.
    Type: Application
    Filed: June 9, 2015
    Publication date: February 4, 2016
    Inventors: Jin KIM, Jin-Man JEOUNG, Sumihito ISHIDA
  • Publication number: 20150287981
    Abstract: A negative active material for a rechargeable lithium battery includes amorphous carbon and lithium metal nitride represented by Chemical Formula 1 Li3-xMxN??Chemical Formula 1 In Chemical Formula 1, M and x are as described in the present disclosure. The negative active material of Chemical Formula 1 has high initial charge and discharge efficiency and excellent reversibility, as well as excellent cycle-life characteristics and high-rate charge and discharge characteristics and thus, can realize a high-capacity rechargeable lithium battery. A method of preparing the negative active material of Chemical Formula 1, and a rechargeable lithium battery including the same are also disclosed.
    Type: Application
    Filed: January 14, 2015
    Publication date: October 8, 2015
    Inventors: Sumihito Ishida, Young-Kee Kim, Jeong-Woo Han
  • Publication number: 20150263336
    Abstract: A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.
    Type: Application
    Filed: May 29, 2015
    Publication date: September 17, 2015
    Inventors: Jung-Woo An, Sumihito Ishida, Joon-Kil Son
  • Patent number: 9093711
    Abstract: An active material for a rechargeable lithium battery and a rechargeable battery, the active material including an active material core; and a thin film graphite layer on the core.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: July 28, 2015
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Kyeu-Yoon Sheem, Sumihito Ishida, Eui-Hwan Song
  • Patent number: 9059463
    Abstract: Disclosed is a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode includes a current collector; and a positive active material layer disposed on the current collector and including a lithium vanadium oxide-based positive active material represented by the following Chemical Formula 1. LixV2-yMyO5??[Chemical Formula 1] In Chemical Formula 1, M is one or more selected from the group consisting of aluminum (Al), magnesium (Mg), zirconium (Zr), titanium (Ti), strontium (Sr), copper (Cu), cobalt (Co), nickel (Ni), manganese (Mn), and a combination thereof, 1<x<4, and 0?y?0.5.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: June 16, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sumihito Ishida, Jung-Woo An, Kyeu-Yoon Sheem