公开(公告)号：US20210179441A1

公开(公告)日：2021-06-17

申请号：US17184147

申请日：2021-02-24

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Kazuaki Kanai ,  Shohei Kitano ,  Makio Naito

IPC: C01G25/02 ,  H01M10/0562

Abstract: The present disclosure is directed to a composite metal oxide particle, and method of producing the same, having an excellent lithium ion conductivity that may be produced at low cost. The present disclosure relates to a garnet-type composite metal oxide particle, containing Li, La, Zr and O; Ga and/or Al; and a halogen element, where a part of a Li site is substituted with the Ga and/or the Al, and at least a part of a particle surface is covered with a melt-solidified material. A ratio of an area covered with the melt-solidified material to a total area of the particle is preferably 10% or more, and the halogen element is preferably Cl.

公开(公告)号：US11973184B2

公开(公告)日：2024-04-30

申请号：US17163804

申请日：2021-02-01

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Kazuaki Kanai ,  Shohei Kitano ,  Makio Naito

IPC: H01M10/0562 ,  H01M4/38 ,  H01M6/18 ,  H01M10/052

CPC classification number: H01M10/0562 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/382 ,  H01M6/18 ,  H01M2300/0068 ,  H01M2300/0071 ,  H01M2300/0077

Abstract: One or more embodiments of the present invention are to provide a method for producing a composite metal oxide having an excellent crystallinity by a mechanochemical method. One or more embodiments of the present invention relate to a method for producing a garnet-type composite metal oxide containing Li, La, Zr and O. The method includes a step of treating a mixture containing raw material powders and a flux by a mechanochemical method to react the raw material powders, and the raw material powders contain a Li source powder, a La source powder and a Zr source powder. The raw material powders may further contain at least one selected from an Al source powder and a Ga source powder.

公开(公告)号：US20220376294A1

公开(公告)日：2022-11-24

申请号：US17880195

申请日：2022-08-03

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Kazuaki Kanai ,  Makio Naito

IPC: H01M10/0562 ,  C04B35/48

Abstract: A solid electrolyte which contains a garnet-type composite metal oxide phase (L) and shows an excellent lithium ion conductivity is provided. The solid electrolyte contains a garnet-type composite metal oxide phase (L) and a phase (D) different from the phase (L). The phase (L) contains Li, La, Zr, O, and Ga, and an Li site in the phase (L) is substituted with the Ga. A lattice constant of the solid electrolyte is not smaller than 12.96 Å. The phase (D) contains at least one of LiF, BaZrO3, YF3, SrF2, and ScF3.

公开(公告)号：US12084355B2

公开(公告)日：2024-09-10

申请号：US17184147

申请日：2021-02-24

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Kazuaki Kanai ,  Shohei Kitano ,  Makio Naito

IPC: C01G25/00 ,  H01M10/0562

CPC classification number: C01G25/006 ,  H01M10/0562 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/04 ,  H01M2300/0071

Abstract: The present disclosure is directed to a composite metal oxide particle, and method of producing the same, having an excellent lithium ion conductivity that may be produced at low cost. The present disclosure relates to a garnet-type composite metal oxide particle, containing Li, La, Zr and O; Ga and/or Al; and a halogen element, where a part of a Li site is substituted with the Ga and/or the Al, and at least a part of a particle surface is covered with a melt-solidified material. A ratio of an area covered with the melt-solidified material to a total area of the particle is preferably 10% or more, and the halogen element is preferably Cl.

公开(公告)号：US20210202947A1

公开(公告)日：2021-07-01

申请号：US17192975

申请日：2021-03-05

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Takashi Kikuchi ,  Kohei Ogawa ,  Kazuaki Kanai ,  Makio Naito ,  Takahiro Kozawa

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/36 ,  C01G53/00

Abstract: A method for producing a positive electrode active material is provided. The method can prevent a gas generation due to an oxidative degradation of a non-aqueous electrolyte in a lithium-ion secondary battery using a positive electrode active material which operates at a high potential. A method for producing a coated positive electrode active material for a lithium-ion secondary battery includes coating a surface of a positive electrode active material with an oxide-based solid electrolyte by a mechanical coating method and then conducting heat treatment at 300° C. or higher, and the positive electrode active material has an average potential of extraction and insertion of lithium of 4.5V or more and 5.0V or less based on Li+/Li.

公开(公告)号：US20210151793A1

公开(公告)日：2021-05-20

申请号：US17163804

申请日：2021-02-01

Applicant: KANEKA CORPORATION ,  OSAKA UNIVERSITY

Inventor： Kazuaki Kanai ,  Shohei Kitano ,  Makio Naito

IPC: H01M10/0562 ,  C01G25/00

Abstract: One or more embodiments of the present invention are to provide a method for producing a composite metal oxide having an excellent crystallinity by a mechanochemical method. One or more embodiments of the present invention relate to a method for producing a garnet-type composite metal oxide containing Li, La, Zr and O. The method includes a step of treating a mixture containing raw material powders and a flux by a mechanochemical method to react the raw material powders, and the raw material powders contain a Li source powder, a La source powder and a Zr source powder. The raw material powders may further contain at least one selected from an Al source powder and a Ga source powder.