Patents by Inventor Yuji Muroya
Yuji Muroya 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: 20210288351Abstract: A secondary battery includes a power generation element that includes a positive electrode, an electrolyte layer for retaining an electrolyte and a negative electrode. The positive electrode has a positive electrode collector on which a positive electrode active material layer is disposed. The negative electrode has a negative electrode collector on which is disposed a negative electrode active material layer having a silicon-containing negative electrode active material. The negative electrode collector has an active material region in which the negative electrode active material layer is disposed, a non-active-material region in which the negative electrode active material layer is not disposed, and a slit extending from the non-active-material region to the active material region.Type: ApplicationFiled: March 7, 2017Publication date: September 16, 2021Inventors: Yuji MUROYA, Yoshinori NARUOKA
-
Patent number: 11043717Abstract: A non-aqueous electrolyte secondary battery with improved cycle durability includes a power generating element including a positive electrode obtained by forming a positive electrode active material layer containing a positive electrode active material on a surface of a positive electrode current collector, a negative electrode obtained by forming a negative electrode active material layer containing a negative electrode active material on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the separator being 1.55 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the separator is 4.0% or less.Type: GrantFiled: June 8, 2016Date of Patent: June 22, 2021Assignee: Envision AESC Japan Ltd.Inventors: Manabu Nishijima, Fumihiro Kawamura, Yuji Muroya, Yoshiaki Nitta
-
Patent number: 10770716Abstract: A flat stacked type non-aqueous electrolyte secondary battery includes: a positive electrode comprising a a positive electrode active material formed on a surface of a positive electrode current collector, a negative electrode comprising a negative electrode active material formed on a surface of a negative electrode current collector, and an electrolyte layer, wherein a ratio of a rated capacity to a pore volume of the negative electrode active material layer is 1.12 Ah/cc or more, a ratio of a battery area to a rated capacity is 4.0 cm2/Ah or more, and a rated capacity is 30 Ah or more, and the electrolyte layer contains an electrolyte solution containing an electrolyte salt dissolved and a value obtained by dividing a weight of an electrolyte salt in pores in the negative electrode active material layer by a weight of the negative electrode active material is 0.031 or more.Type: GrantFiled: June 8, 2016Date of Patent: September 8, 2020Assignee: Envision AESC Japan Ltd.Inventors: Manabu Nishijima, Fumihiro Kawamura, Masanori Suenaga, Yuji Muroya
-
Publication number: 20190355969Abstract: Provided is a non-aqueous electrolyte secondary battery which has improved battery durability in the battery having a high capacity, a high density, and a large area. A non-aqueous electrolyte secondary battery including a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the positive electrode active material layer being 1.40 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the positive electrode active material layer is 6.0% or less.Type: ApplicationFiled: June 8, 2016Publication date: November 21, 2019Inventors: Yuji Muroya, Fumihiro Kawamura, Manabu Nishijima, Yoshiaki Nitta
-
Patent number: 10476110Abstract: A non-aqueous electrolyte secondary battery has improved battery durability, a high capacity, a high density, and a large area and includes a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the negative electrode active material layer being 1.12 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the negative electrode active material layer is 6.0% or less.Type: GrantFiled: June 8, 2016Date of Patent: November 12, 2019Assignee: Envision AESC Japan Ltd.Inventors: Fumihiro Kawamura, Manabu Nishijima, Yuji Muroya, Yoshiaki Nitta
-
Patent number: 10431830Abstract: A current collector for a battery includes: a layer (1) formed from an electrically conductive material and at least one of (a) a polymer compound having an alicyclic structure, (b) a saturated hydrocarbon polymer compound having a hydroxyl group, (c) a phenoxy resin and an epoxy resin, and (d) an amine having an amine equivalent of 120 g/eq or less and an epoxy resin; a layer (2) which is formed on at least one surface of the layer (1); and a layer (3) formed from an electrically conductive material. The current collector for a battery has stability to an equilibrium potential environment in a negative electrode, a low electric resistance, a blocking property to solvent in electrolytic solution, and a blocking property to a component in an electrolyte. In addition, the current collector for a battery has a high capacity retention rate, and battery durability is improved.Type: GrantFiled: August 29, 2013Date of Patent: October 1, 2019Assignees: KANEKA CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Satoshi Oku, Yusuke Kato, Akiko Waki, Takashi Kikuchi, Takashi Ito, Masahiro Kojima, Gentaro Kano, Shiho Inoue, Yasuyuki Tanaka, Norihisa Waki, Yuji Muroya, Kazuki Miyatake, Yoshio Shimoida, Keisuke Wakabayashi, Tomohisa Matsuno, Seiji Ishimoto
-
Publication number: 20190273285Abstract: Provided is a non-aqueous electrolyte secondary battery which has improved battery durability in the battery having a high capacity, a high density, and a large area. A non-aqueous electrolyte secondary battery including a power generating element including a positive electrode in which a positive electrode active material layer containing a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the negative electrode active material layer being 1.12 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the negative electrode active material layer is 6.0% or less.Type: ApplicationFiled: June 8, 2016Publication date: September 5, 2019Inventors: Fumihiro Kawamura, Manabu Nishijima, Yuji Muroya, Yoshiaki Nitta
-
Publication number: 20190259999Abstract: Provided is a means capable of improving battery cycle durability in a non-aqueous electrolyte secondary battery having a capacity and a size which are assumed to increase the capacity. A non-aqueous electrolyte secondary battery including a power generating element including a positive electrode obtained by forming a positive electrode active material layer containing a positive electrode active material on a surface of a positive electrode current collector, a negative electrode obtained by forming a negative electrode active material layer containing a negative electrode active material on a surface of a negative electrode current collector, and a separator, a ratio of a rated capacity to a pore volume of the separator being 1.55 Ah/cc or more, a ratio of a battery area to a rated capacity being 4.0 cm2/Ah or more, and a rated capacity being 30 Ah or more, wherein a variation in porosity in the separator is 4.0% or less.Type: ApplicationFiled: June 8, 2016Publication date: August 22, 2019Applicant: Nissan Motor Co., Ltd.Inventors: Manabu NISHIJIMA, Fumihiro KAWAMURA, Yuji MUROYA, Yoshiaki NITTA
-
Publication number: 20190165361Abstract: To provide a non-aqueous electrolyte secondary battery exhibiting improved battery durability in a flat stacked type battery having a high capacity, a high density and a large area. A solution is a flat stacked type non-aqueous electrolyte secondary battery including a power generating element including: a positive electrode comprising a positive electrode active material layer containing a positive electrode active material formed on a surface of a positive electrode current collector, a negative electrode comprising a negative electrode active material layer containing a negative electrode active material formed on a surface of a negative electrode current collector, and an electrolyte layer, wherein a ratio of a rated capacity to a pore volume of the negative electrode active material layer is 1.12 Ah/cc or more, a ratio of a battery area to a rated capacity is 4.Type: ApplicationFiled: June 8, 2016Publication date: May 30, 2019Inventors: Manabu Nishijima, Fumihiro Kawamura, Masanori Suenaga, Yuji Muroya
-
Patent number: 10230112Abstract: A conductive film includes a layer 1 formed by a conductive material 1 that includes a polymer material 1 containing any of (1) an amine and an epoxy resin (where the epoxy resin and the amine are mixed in a ratio of 1.0 or more in terms of the ratio of the number of active hydrogen atoms in the amine with respect to the number of functional groups in the epoxy resin), (2) a phenoxy resin and an epoxy resin, (3) a saturated hydrocarbon polymer having a hydroxyl group, and (4) a curable resin and an elastomer and conductive particles 1. The conductive film has excellent stability in an equilibrium potential environment in a negative electrode and low electric resistance per unit area in the thickness direction. A multilayer conductive film including the conductive film achieves excellent interlayer adhesion, and using them as a current collector enables the production of a battery satisfying both weight reduction and durability.Type: GrantFiled: May 22, 2012Date of Patent: March 12, 2019Assignee: NISSAN MOTOR CO., LTD.Inventors: Yusuke Kato, Takashi Ito, Masami Yanagida, Satoshi Oku, Hiroyuki Ogino, Masato Kusakabe, Ryutaro Mukai, Masahiro Kojima, Takashi Kikuchi, Akiko Waki, Shiho Inoue, Shigeo Ibuka, Yasuyuki Tanaka, Yoshio Shimoida, Yuji Muroya, Norihisa Waki
-
Patent number: 9601780Abstract: A multilayer conductive film includes a layer 1 including a conductive material containing a polymer material 1 having an alicyclic structure and conductive particles 1 and a layer 2 including a material having durability against positive electrode potential. The multilayer conductive film has stability in an equilibrium potential environment in a negative electrode and stability in an equilibrium potential environment in a positive electrode, has low electric resistance per unit area in the thickness direction, and has excellent barrier properties for a solvent of an electrolytic solution. A battery including a current collector employing the multilayer conductive film can achieve both weight reduction and durability.Type: GrantFiled: May 22, 2012Date of Patent: March 21, 2017Assignees: KANEKA CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Yusuke Kato, Masahiro Kojima, Ryutaro Mukai, Masato Kusakabe, Hiroyuki Ogino, Takashi Kikuchi, Takashi Ito, Satoshi Oku, Akiko Waki, Shiho Inoue, Yuji Muroya, Norihisa Waki, Yasuyuki Tanaka, Shigeo Ibuka, Yoshio Shimoida
-
Publication number: 20150318555Abstract: A current collector for a battery includes: a layer (1) formed from an electrically conductive material and at least one of (a) a polymer compound having an alicyclic structure, (b) a saturated hydrocarbon polymer compound having a hydroxyl group, (c) a phenoxy resin and an epoxy resin, and (d) an amine having an amine equivalent of 120 g/eq or less and an epoxy resin; a layer (2) which is formed on at least one surface of the layer (1); and a layer (3) formed from an electrically conductive material. The current collector for a battery has stability to an equilibrium potential environment in a negative electrode, a low electric resistance, a blocking property to solvent in electrolytic solution, and a blocking property to a component in an electrolyte. In addition, the current collector for a battery has a high capacity retention rate, and battery durability is improved.Type: ApplicationFiled: August 29, 2013Publication date: November 5, 2015Applicants: KANEKA CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Satoshi Oku, Yusuke Kato, Akiko Waki, Takashi Kikuchi, Takashi Ito, Masahiro Kojima, Gentaro Kano, Shiho Inoue, Yasuyuki Tanaka, Norihisa Waki, Yuji Muroya, Kazuki Miyatake, Yoshio Shimoida, Keisuke Wakabayashi, Tomohisa Matsuno, Seiji Ishimoto
-
Publication number: 20150303483Abstract: A collector for bipolar lithium ion secondary batteries including an electroconductive polyimide layer including a conductivity-imparting agent dispersed in a polyimide resin that is prepared by imidizing a polyamic acid that is obtained by reacting at least one tetracarboxylic dianhydride component of biphenyltetracarboxylic dianhydrides, 3,3?,4,4?-benzophenonetetracarboxylic dianhydride, pyromellitic dianhydride, and [isopropylidenebis(p-phenyleneoxy)]diphthalic dianhydrides with at least one diamine component of oxydianilines, phenylenediamines, and 2,2-bis[4-(4-aminophenoxy)phenyl]propane has excellent solvent barrier properties to an electrolytic solution, and can be used to give a highly reliable bipolar lithium ion secondary battery.Type: ApplicationFiled: November 18, 2013Publication date: October 22, 2015Applicants: KANEKA CORPORATION, NISSAN MOTOR CO., LTD.Inventors: Takashi Kikuchi, Masami Yanagida, Takashi Ito, Kohei Ogawa, Satoshi Oku, Keisuke Wakabayashi, Norihisa Waki, Yuji Muroya, Yoshio Shimoida, Seiji Ishimoto, Tomohisa Matsuno
-
Publication number: 20140186699Abstract: A multilayer conductive film includes a layer 1 including a conductive material containing a polymer material 1 having an alicyclic structure and conductive particles 1 and a layer 2 including a material having durability against positive electrode potential. The multilayer conductive film has stability in an equilibrium potential environment in a negative electrode and stability in an equilibrium potential environment in a positive electrode, has low electric resistance per unit area in the thickness direction, and has excellent barrier properties for a solvent of an electrolytic solution. A battery including a current collector employing the multilayer conductive film can achieve both weight reduction and durability.Type: ApplicationFiled: May 22, 2012Publication date: July 3, 2014Applicant: Nissan Motor Co., Ltd.Inventors: Yusuke Kato, Masahiro Kojima, Ryutaro Mukai, Masato Kusakabe, Hiroyuki Ogino, Takashi Kikuchi, Takashi Ito, Satoshi Oku, Akiko Waki, Shiho Inoue, Yuji Muroya, Norihisa Waki, Yasuyuki Tanaka, Shigeo Ibuka, Yoshio Shimoida
-
Publication number: 20140099537Abstract: A conductive film includes a layer 1 formed by a conductive material 1 that includes a polymer material 1 containing any of (1) an amine and an epoxy resin (where the epoxy resin and the amine are mixed in a ratio of 1.0 or more in terms of the ratio of the number of active hydrogen atoms in the amine with respect to the number of functional groups in the epoxy resin), (2) a phenoxy resin and an epoxy resin, (3) a saturated hydrocarbon polymer having a hydroxyl group, and (4) a curable resin and an elastomer and conductive particles 1. The conductive film has excellent stability in an equilibrium potential environment in a negative electrode and low electric resistance per unit area in the thickness direction. A multilayer conductive film including the conductive film achieves excellent interlayer adhesion, and using them as a current collector enables the production of a battery satisfying both weight reduction and durability.Type: ApplicationFiled: May 22, 2012Publication date: April 10, 2014Applicants: Nissan Motor Co., Ltd., Kaneka CorporationInventors: Yusuke Kato, Takashi Ito, Masami Yanagida, Satoshi Oku, Hiroyuki Ogino, Masato Kusakabe, Ryutaro Mukai, Masahiro Kojima, Takashi Kikuchi, Akiko Waki, Shiho Inoue, Shigeo Ibuka, Yasuyuki Tanaka, Yoshio Shimoida, Yuji Muroya, Norihisa Waki