Patents Assigned to 3DOM INC.
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Patent number: 11139534Abstract: Provided is a lithium secondary battery separator including a laminate of a substrate and a porous heat-resistant polyimide film which covers at least one surface of the substrate. The porous heat-resistant polyimide film has pores which are regularly arrayed three-dimensionally and a film thickness of 5-20 ?m. Penetration damage to the separator by growth of dendrite-shaped lithium is avoided, and it is also possible to meet a request which is demanded of the lithium secondary battery separator.Type: GrantFiled: December 9, 2011Date of Patent: October 5, 2021Assignees: TOKYO METROPOLITAN UNIVERSITY, 3DOM INC.Inventors: Kiyoshi Kanamura, Hirokazu Munakata, Yongcheng Jin
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Publication number: 20210151788Abstract: To provide: an electrolyte film having a practical film thickness, an excellent mechanical strength, and electrochemical characteristics; an electrolyte composition making it possible to obtain the electrolyte film; and a cell in which the electrolyte film is used. [Solution] An electrolyte composition characterized in comprising an electrolyte powder, a binder, and an ion-conductive material; the electrolyte powder being an oxide-based ceramic electrolyte powder; the binder being a polymer compound that is stable with respect to metal ions; the ion-conductive material being a solvated ion-conductive material or an ion-conductive solution having a metal ion-based compound. An electrolyte film characterized in being provided with an electrolyte powder and a composite material in which a binder and an ion-conductive material are made into a composite.Type: ApplicationFiled: July 24, 2018Publication date: May 20, 2021Applicants: TOKYO METROPOLITAN UNIVERSITY, 3DOM INC.Inventors: Kiyoshi Kanamura, Hirokazu Munakata, Takeshi Kimura
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Patent number: 10930911Abstract: Provided is a separator which can make the electric field on the surface of a negative electrode for a metal secondary battery homogeneous to thereby prevent the formation of dendrites. A porous separator for metal secondary batteries, which has a polymer electrolyte layer formed on the surface layer of at least one main surface of a porous polyimide film. It is preferred that the polymer electrolyte layer is composed of both a polymer electrolyte material which is supported on at least one main surface of the porous polyimide film and a polymer electrolyte material which is supported in voids in a layered region that extends from the main surface.Type: GrantFiled: August 27, 2015Date of Patent: February 23, 2021Assignees: TOKYO OHKA KOGYO CO., LTD., TOKYO METROPOLITAN UNIVERSITY, 3DOM INCInventors: Hiroyoshi Sago, Kiyoshi Kanamura, Hirokazu Munakata, Kazuhiro Imazawa
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Publication number: 20200119354Abstract: To provide an electrode which can sufficiently exhibit the battery characteristics necessary for a solid-state battery, a production method therefor, an electrode composition for producing said electrode, and a battery using the electrode.Type: ApplicationFiled: January 26, 2018Publication date: April 16, 2020Applicants: TOKYO METROPOLITAN UNIVERSITY, 3DOM INC.Inventors: Kiyoshi Kanamura, Hirokazu Munakata, Mao Shoji
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Patent number: 10096809Abstract: A method for manufacturing, a secondary battery separator including a porous resin film in which pores have three-dimensionally ordered structure and are in mutual communication via through-holes. The method includes: uniformly dispersing spherical microparticles having narrow particle size distribution in a dispersion medium to prepare a microparticles-dispersed slurry; drying slurry to obtain a spherical microparticles-dispersed film; heat-treating the film to form a microparticles-resin film in which the microparticles are regularly arrayed in three-dimensions in a resin matrix; and contacting the microparticles-resin film with an organic acid, water, an alkaline solution or an inorganic acid other than hydrofluoric acid to dissolve and remove the microparticles, or heating the microparticles-resin film to remove the microparticles, to form pores which are in mutual communication and regularly arrayed in the resin matrix.Type: GrantFiled: June 4, 2014Date of Patent: October 9, 2018Assignees: TOKYO METROPOLITAN UNIVERSITY, 3DOM INC., TOKYO OHKA KOGYO CO., LTD.Inventors: Kiyoshi Kanamura, Hirokazu Munakata, Kazuhiro Imazawa, Hiroyoshi Sago
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Publication number: 20180198120Abstract: A lithium secondary battery having a positive electrode, a negative electrode, a separator and an electrolyte solution, in which the positive electrode contains a first active material and a second active material each capable of intercalating and deintercalating lithium. The first active material is in the state under which only deintercalation of lithium can be carried out in a battery reaction with the negative electrode immediately after assembly of the lithium secondary battery, and the second active material is in the state under which lithium can be intercalated in the battery reaction with the negative electrode immediately after assembly of the lithium secondary battery. The negative electrode contains metal lithium as an active material. The separator has a structure in which pores are three-dimensionally regularly arranged.Type: ApplicationFiled: April 28, 2016Publication date: July 12, 2018Applicants: Tokyo Metropolitan University, 3DOM Inc.Inventors: Masaaki KUBOTA, Hidetoshi ABE, Miyu NEMOTO, Kiyoshi KANAMURA, Kazuhiro IMAZAWA
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Publication number: 20170279101Abstract: Provided is a separator which can make the electric field on the surface of a negative electrode for a metal secondary battery homogeneous to thereby prevent the formation of dendrites. A porous separator for metal secondary batteries, which has a polymer electrolyte layer formed on the surface layer of at least one main surface of a porous polyimide film. It is preferred that the polymer electrolyte layer is composed of both a polymer electrolyte material which is supported on at least one main surface of the porous polyimide film and a polymer electrolyte material which is supported in voids in a layered region that extends from the main surface.Type: ApplicationFiled: August 27, 2015Publication date: September 28, 2017Applicants: TOKYO OHKO KOGYO CO., LTD., TOKYO METROPOLITAN UNIVERSITY, 3DOM INC.Inventors: Hiroyoshi SAGO, Kiyoshi KANAMURA, Hirokazu MUNAKATA, Kazuhiro IMAZAWA
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Publication number: 20160111695Abstract: A method for manufacturing, a secondary battery separator including a porous resin film in which pores have three-dimensionally ordered structure and are in mutual communication via through-holes. The method includes: uniformly dispersing spherical microparticles having narrow particle size distribution in a dispersion medium to prepare a microparticles-dispersed slurry; drying slurry to obtain a spherical microparticles-dispersed film; heat-treating the film to form a microparticles-resin film in which the microparticles are regularly arrayed in three-dimensions in a resin matrix; and contacting the microparticles-resin film with an organic acid, water, an alkaline solution or an inorganic acid other than hydrofluoric acid to dissolve and remove the microparticles, or heating the microparticles-resin film to remove the microparticles, to form pores which are in mutual communication and regularly arrayed in the resin matrix.Type: ApplicationFiled: June 4, 2014Publication date: April 21, 2016Applicants: TOKYO METROPOLITAN UNIVERSITY, 3DOM INC., TOKYO OHKA KOGYO CO., LTD.Inventors: Kiyoshi KANAMURA, Hirokazu MUNAKATA, Kazuhiro IMAZAWA, Hiroyoshi SAGO