Patents by Inventor Willy Shun Kai Bong

Willy Shun Kai Bong 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: 20210020922
    Abstract: A non-aqueous electrolyte secondary battery which is obtained using a lithium composite oxide having a layered structure and coated with a tungsten-containing compound in a positive electrode active substance, and which has a low initial resistance, and in which an increase in resistance following repeated charging and discharging is suppressed. The non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer containing a lithium composite oxide having a layered structure. The lithium composite oxide includes a porous particle having a void ratio of not less than 20% but not more than 50%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle is provided with a coating containing tungsten oxide and lithium tungstate.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210020901
    Abstract: Provided is a nonaqueous electrolyte secondary battery with a positive electrode active material that contains an excess of Li and has a layered structure, the nonaqueous electrolyte secondary battery having a high output and enabling prevention of gelation of the positive electrode active material layer-forming paste during production. The herein disclosed nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer contains a lithium composite oxide having a layered structure as a positive electrode active material. The compositional ratio of the lithium atom to the metal atom other than a lithium atom contained in the lithium composite oxide is greater than 1. The lithium composite oxide is in the form of porous particles.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji Yamamoto, Momoko Procter, Yoshinari Makimura, Tetsutaro Hayashi, Willy Shun Kai Bong
  • Publication number: 20210020923
    Abstract: A non-aqueous electrolyte secondary battery is obtained using a lithium composite oxide having a layered structure in a positive electrode active substance. An increase in resistance following repeated charging and discharging is suppressed. The battery includes a positive electrode provided with a positive electrode active substance layer, a negative electrode and a non-aqueous electrolyte. The positive electrode active substance layer contains a porous particle lithium composite oxide having a layered structure. The average void ratio of the porous particle is not less than 12% but not more than 50%, and it contains two or more voids having diameters that are at least 8% of its particle diameter. The surface of the porous particle is provided with a coating of lithium tungstate. The coverage ratio of the surface of the porous particle by the lithium tungstate is not less than 10% but not more than 65%.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210020900
    Abstract: A non-aqueous electrolyte secondary battery that has a low initial resistance and an increase in resistance after charging and discharging is suppressed. The secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode active substance layer, which contains a lithium composite oxide having a layered structure. The lithium composite oxide is a porous particle. A surface of the porous particle includes a layer having a rock salt type structure. A thickness of the layer is not less than 5 nm and not more than 80 nm. A void ratio of the porous particle is not less than 15% and not more than 48%. The porous particle contains two or more voids having diameters that are at least 10% of the particle diameter of the porous particle. The surface of the porous particle includes a coating of lithium tungstate.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai Bong
  • Publication number: 20210020924
    Abstract: A nonaqueous electrolyte secondary battery uses, as a positive electrode active material, a lithium composite oxide having a layered structure and coated with lithium tungstate, and has a low resistance. The nonaqueous electrolyte secondary battery includes positive and negative electrodes and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer containing a lithium composite oxide having a layered structure as a positive electrode active material. The lithium composite oxide is in the form of porous particles, each having at least two voids each having a percentage of a void area with respect to the area occupied by each of the particles in its cross-sectional view of at least 1%. Each porous particle has a void connecting the particle interior to the surface and having an opening with a diameter of at least 100 nm. Each porous particle has a lithium tungstate coating on its surface.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 21, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO METAL MINING CO., LTD.
    Inventors: Yuji YAMAMOTO, Momoko PROCTER, Yoshinari MAKIMURA, Tetsutaro HAYASHI, Willy Shun Kai BONG
  • Publication number: 20210020925
    Abstract: The present disclosure can bring excellent output characteristics to a nonaqueous electrolyte secondary battery that uses a cathode active material containing tungsten while desired durability is secured. The battery of the present disclosure includes a cathode, an anode, and a nonaqueous electrolyte. The cathode includes a cathode active material layer that contains a granular cathode active material. The cathode active material includes a core part that contains a lithium-transition metal composite oxide of a layered structure; a tungsten-concentrated layer that is formed over a surface of the core part and has a higher tungsten concentration than in the core part; and a lithium-tungsten compound particle that adheres to at least part of a surface of the tungsten-concentrated layer and contains tungsten and lithium. In the battery of the present disclosure, the tungsten-concentrated layer has an amorphous structure. This can bring excellent output characteristics while desired durability is secured.
    Type: Application
    Filed: July 16, 2020
    Publication date: January 21, 2021
    Applicants: Toyota Jidosha Kabushiki Kaisha, Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuji Yamamoto, Momoko Procter, Yoshinari Makimura, Tetsutaro Hayashi, Willy Shun Kai Bong