Patents by Inventor Yoshihiro Minato
Yoshihiro Minato 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: 11398626Abstract: An objective of the present disclosure is to provide a method of producing metal compound particle group for an electricity storage device electrode that has an improved rate characteristic, the metal compound particle group, and an electrode formed of the metal compound particle group. The method of producing metal compound particle group applied for an electrode of an electricity storage device, the method includes a step of combining a precursor of metal compound particle with a carbon source to obtain a first composite material, a step of producing the metal compound particle by heat processing the first composite material under a non-oxidizing atmosphere to obtain a second composite material having the metal compound particle combined with carbon, and a step of eliminating carbon by heat processing the second composite material under an oxygen atmosphere to obtain the metal compound particle group having the metal compound particle coupled in a three-dimensional mesh structure.Type: GrantFiled: June 26, 2019Date of Patent: July 26, 2022Assignee: Nippon Chemi-Con CorporationInventors: Hirotaka Hanawa, Yoshihiro Minato, Satoru Tsumeda, Shuichi Ishimoto, Katsuhiko Naoi, Wako Naoi
-
Publication number: 20220077463Abstract: A metal compound particle group that can suppress increase of internal resistance of power storage device, an electrode including the metal compound particle group for power storage device, and a method for producing the metal compound particle group are provided. A metal compound particle group has a 3D network structure in which metal compound particles are linked, and a coating layer C including silicon oxide is formed on a part of the metal compound particle group. The coating layer C including silicon oxide is formed on at least a part of a surface of the metal compound particle group. A gap 2 exists in the 3D network structure, and the coating layer C including silicon oxide is formed on the surface of the metal compound particle defining the gap 2. The coating layer C including silicon oxide is an amorphous silicon oxide.Type: ApplicationFiled: November 18, 2019Publication date: March 10, 2022Inventors: Yoshihiro MINATO, Shuichi ISHIMOTO, Ryuta MURASHIGE, Katsuhiko NAOI, Wako NAOI
-
Patent number: 11024469Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.Type: GrantFiled: May 2, 2019Date of Patent: June 1, 2021Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Masaki Koike, Noriyuki Miyamoto, Masashi Otsuka, Sekihiro Takeda, Katsuhiko Naoi, Wako Naoi
-
Patent number: 10858252Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.Type: GrantFiled: October 21, 2016Date of Patent: December 8, 2020Assignees: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
-
Patent number: 10847801Abstract: Provided is conductive carbon which gives an electric storage device having a high energy density. This conductive carbon is characterized in having a hydrophilic solid phase component, where the ratio of the peak area of an amorphous component band in the vicinity of 1510 cm?1 against the peak area in a range from 980 to 1780 cm?1 in a Raman spectrum of the hydrophilic solid phase component is within a range of 13 to 19%. When performing a rolling treatment on an active layer including an active particle and this conductive carbon formed on a current collector during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste-like form and increase in density while covering the surface of the active particles, the conductive carbon being pressed into gaps formed between adjacent active particles and filling the gaps.Type: GrantFiled: October 16, 2014Date of Patent: November 24, 2020Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Katsuhiko Naoi, Wako Naoi
-
Patent number: 10784514Abstract: Provided is conductive carbon that gives an electrical storage device having a high energy density. This conductive carbon includes a hydrophilic part, and the contained amount of the hydrophilic part is 10 mass % or more of the entire conductive carbon. When performing a rolling treatment on an active material layer including an active material particle and this conductive carbon formed on a current collector during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste-like form and increase in density. The active material particles approach each other, and the conductive carbon is pressed into gaps formed between adjacent active material particles, filling the gaps. As a result, the amount of active material per unit volume in the electrode obtained after the rolling treatment increases, and the electrode density increases.Type: GrantFiled: April 18, 2019Date of Patent: September 22, 2020Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Katsuhiko Naoi, Wako Naoi
-
Patent number: 10603721Abstract: A hard alloy includes complex carbonitride hard phases that contain Ti and at least one additional element, and a metal binder phase containing an iron group element as a main component element. The complex carbonitride hard phases include homogeneous composition hard phases where in-complex carbonitride hard phase average concentrations of Ti and the additional element have a difference of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in all the complex carbonitride hard phases. On any cross section specified in the hard alloy, a cross-sectional area of the homogeneous composition hard phases accounts for greater than or equal to 80% of a cross-sectional area of the complex carbonitride hard phases, and the homogeneous composition hard phases account for greater than or equal to 80% of the complex carbonitride hard phases in number.Type: GrantFiled: October 21, 2016Date of Patent: March 31, 2020Assignee: Sumitomo Electric Industries, Ltd.Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato
-
Patent number: 10573896Abstract: Provided is conductive carbon that gives an electrical storage device having a high energy density. This conductive carbon includes a hydrophilic part, and the contained amount of the hydrophilic part is 10 mass % or more of the entire conductive carbon. When performing a rolling treatment on an active material layer including an active material particle and this conductive carbon formed on a current collector during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste-like form and increase in density. The active material particles approach each other, and the conductive carbon is pressed into gaps formed between adjacent active material particles, filling the gaps. As a result, the amount of active material per unit volume in the electrode obtained after the rolling treatment increases, and the electrode density increases.Type: GrantFiled: March 5, 2015Date of Patent: February 25, 2020Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Katsuhiko Naoi, Wako Naoi
-
Publication number: 20190386301Abstract: An objective of the present disclosure is to provide a method of producing metal compound particle group for an electricity storage device electrode that has an improved rate characteristic, the metal compound particle group, and an electrode formed of the metal compound particle group. The method of producing metal compound particle group applied for an electrode of an electricity storage device, the method includes a step of combining a precursor of metal compound particle with a carbon source to obtain a first composite material, a step of producing the metal compound particle by heat processing the first composite material under a non-oxidizing atmosphere to obtain a second composite material having the metal compound particle combined with carbon, and a step of eliminating carbon by heat processing the second composite material under an oxygen atmosphere to obtain the metal compound particle group having the metal compound particle coupled in a three-dimensional mesh structure.Type: ApplicationFiled: June 26, 2019Publication date: December 19, 2019Inventors: Hirotaka HANAWA, Yoshihiro MINATO, Satoru TSUMEDA, Shuichi ISHIMOTO, Katsuhiko NAOI, Wako NAOI
-
Patent number: 10505187Abstract: An objective of the present disclosure is to provide a method of producing metal compound particle group for an electricity storage device electrode that has an improved rate characteristic, the metal compound particle group, and an electrode formed of the metal compound particle group. The method of producing metal compound particle group applied for an electrode of an electricity storage device, the method includes a step of combining a precursor of metal compound particle with a carbon source to obtain a first composite material, a step of producing the metal compound particle by heat processing the first composite material under a non-oxidizing atmosphere to obtain a second composite material having the metal compound particle combined with carbon, and a step of eliminating carbon by heat processing the second composite material under an oxygen atmosphere to obtain the metal compound particle group having the metal compound particle coupled in a three-dimensional mesh structure.Type: GrantFiled: May 27, 2015Date of Patent: December 10, 2019Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Hirotaka Hanawa, Yoshihiro Minato, Satoru Tsumeda, Shuichi Ishimoto, Katsuhiko Naoi, Wako Naoi
-
Publication number: 20190259545Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.Type: ApplicationFiled: May 2, 2019Publication date: August 22, 2019Applicant: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi KUBOTA, Yoshihiro MINATO, Shuichi ISHIMOTO, Kenji TAMAMITSU, Masaki KOIKE, Noriyuki MIYAMOTO, Masashi OTSUKA, Sekihiro TAKEDA, Katsuhiko NAOI, Wako NAOI
-
Publication number: 20190245209Abstract: Provided is conductive carbon that gives an electrical storage device having a high energy density. This conductive carbon includes a hydrophilic part, and the contained amount of the hydrophilic part is 10 mass % or more of the entire conductive carbon. When performing a rolling treatment on an active material layer including an active material particle and this conductive carbon formed on a current collector during manufacture of an electrode of an electric storage device, the pressure resulting from the rolling treatment causes this conductive carbon to spread in a paste-like form and increase in density. The active material particles approach each other, and the conductive carbon is pressed into gaps formed between adjacent active material particles, filling the gaps. As a result, the amount of active material per unit volume in the electrode obtained after the rolling treatment increases, and the electrode density increases.Type: ApplicationFiled: April 18, 2019Publication date: August 8, 2019Applicant: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi KUBOTA, Yoshihiro MINATO, Shuichi ISHIMOTO, Kenji TAMAMITSU, Katsuhiko NAOI, Wako NAOI
-
Patent number: 10374222Abstract: Provided is an electrode material which leads to a lithium ion secondary battery that has high energy density. An electrode material for a lithium ion secondary battery of the present invention is characterized by containing: a coarse particle of a first active material that is able to act as a positive electrode active material or a negative electrode active material of a lithium ion secondary battery; and a particle of a composite composed of conductive carbon and a second active material attached to the conductive carbon that is able to act as an active material of the same electrode as the first active material. This electrode material for a lithium ion secondary battery is also characterized in that: a diameter of the coarse particle of the first active material is larger than a diameter of the particle of the composite; and the particle of the composite is filled in a gap formed between the particles of the first active material. A conductive agent can be additionally contained in the gap.Type: GrantFiled: September 2, 2013Date of Patent: August 6, 2019Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Katsuhiko Naoi, Wako Naoi, Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu
-
Patent number: 10332692Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.Type: GrantFiled: May 18, 2015Date of Patent: June 25, 2019Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Masaki Koike, Noriyuki Miyamoto, Masashi Otsuka, Sekihiro Takeda, Katsuhiko Naoi, Wako Naoi
-
Publication number: 20190092638Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.Type: ApplicationFiled: October 21, 2016Publication date: March 28, 2019Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
-
Patent number: 9905853Abstract: Provided is conductive carbon which gives an electric storage device having a high energy density. This conductive carbon is characterized in having a hydrophilic solid phase component, where a crystallite size La that does not include a twist in a graphene surface direction and a crystallite size Leq that includes a twist in a graphene surface direction, which are calculated from a Raman spectrum of the hydrophilic solid phase component, satisfy the following relationships: 1.3 nm?La?1.5 nm, and 1.5 nm?Leq?2.3 nm, and 1.0?Leq/La?1.55.Type: GrantFiled: October 16, 2014Date of Patent: February 27, 2018Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Satoshi Kubota, Yoshihiro Minato, Shuichi Ishimoto, Kenji Tamamitsu, Katsuhiko Naoi, Wako Naoi
-
Publication number: 20180036806Abstract: A hard alloy includes complex carbonitride hard phases that contain Ti and at least one additional element, and a metal binder phase containing an iron group element as a main component element. The complex carbonitride hard phases include homogeneous composition hard phases where in-complex carbonitride hard phase average concentrations of Ti and the additional element have a difference of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in all the complex carbonitride hard phases. On any cross section specified in the hard alloy, a cross-sectional area of the homogeneous composition hard phases accounts for greater than or equal to 80% of a cross-sectional area of the complex carbonitride hard phases, and the homogeneous composition hard phases account for greater than or equal to 80% of the complex carbonitride hard phases in number.Type: ApplicationFiled: October 21, 2016Publication date: February 8, 2018Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato
-
Patent number: 9843037Abstract: A method for manufacturing composites in which the nanosize of a carbon material and a metal compound can be maintained as the final product is realized to provide a superior electrode material. A treatment of increasing the functional groups possessed by a carbon material is performed in advance. Then, a metal compound precursor is supported on a carbon material by separately performing a treatment of adsorbing one of source materials of the metal compound to the functional groups of the carbon material having increased functional groups and a treatment of reacting the adsorbed source material of the metal compound with the rest of the source materials on the carbon material to produce a metal compound precursor on the carbon material. Finally, a lithium source is introduced and calcined.Type: GrantFiled: March 27, 2015Date of Patent: December 12, 2017Assignee: NIPPON CHEMI-CON CORPORATIONInventors: Katsuhiko Naoi, Wako Naoi, Yoshihiro Minato, Satoshi Kubota, Syuichi Ishimoto, Kenji Tamamitsu
-
Publication number: 20170346090Abstract: An objective of the present disclosure is to provide a method of producing metal compound particle group for an electricity storage device electrode that has an improved rate characteristic, the metal compound particle group, and an electrode formed of the metal compound particle group. The method of producing metal compound particle group applied for an electrode of an electricity storage device, the method includes a step of combining a precursor of metal compound particle with a carbon source to obtain a first composite material, a step of producing the metal compound particle by heat processing the first composite material under a non-oxidizing atmosphere to obtain a second composite material having the metal compound particle combined with carbon, and a step of eliminating carbon by heat processing the second composite material under an oxygen atmosphere to obtain the metal compound particle group having the metal compound particle coupled in a three-dimensional mesh structure.Type: ApplicationFiled: May 27, 2015Publication date: November 30, 2017Inventors: Hirotaka HANAWA, Yoshihiro MINATO, Satoru TSUMEDA, Shuichi ISHIMOTO, Katsuhiko NAOI, Wako NAOI
-
Publication number: 20170221644Abstract: Provided is an electrode which gives an electric storage device that has high energy density and good cycle life. This electrode for an electric storage device is characterized by having an active material layer that contains: an electrode active material particle; and a paste-like conductive carbon that is derived from an oxidized carbon obtained by giving an oxidizing treatment to a carbon raw material with an inner vacancy and covers a surface of the electrode active material particle. The paste-like conductive carbon derived from the oxidized carbon is densely filled not only into a gap that is formed between the electrode active material particles adjacent to each other but also into a pore that exists on the surface of the active material particle, so that the electrode density is increased, thereby improving the energy density of the electric storage device.Type: ApplicationFiled: May 18, 2015Publication date: August 3, 2017Applicant: Nippon Chemi-Con CorporationInventors: Satoshi KUBOTA, Yoshihiro MINATO, Shuichi ISHIMOTO, Kenji TAMAMITSU, Masaki KOIKE, Noriyuki MIYAMOTO, Masashi OTSUKA, Sekihiro TAKEDA, Katsuhiko NAOI, Wako NAOI