Patents by Inventor Fumiharu Niina
Fumiharu Niina 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: 20210135214Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the second particle is larger than a coverage ratio of B on surfaces of the first particle by 5% or greater.Type: ApplicationFiled: October 27, 2020Publication date: May 6, 2021Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
-
Publication number: 20210135213Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.Type: ApplicationFiled: October 27, 2020Publication date: May 6, 2021Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Natsumi Goto, Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Ryo Hanazaki
-
Publication number: 20210098786Abstract: An advantage is to provide a non-aqueous electrolyte secondary battery with improved heat resistance. A positive electrode active material contains a lithium-transition metal composite oxide containing 80 mol % or more of Ni and 0.1 mol % to 1.5 mol % of B on the basis of the total number of moles of metal elements excluding Li, and B and at least one element (M1) selected from Groups 4 to 6 are present on at least the surfaces of particles of the composite oxide. When particles having a volume-based particle size larger than 70% particle size (D70) are first particles, and particles having a volume-based particle size smaller than 30% particle size (D30) are second particles, the molar fraction of M1 on the basis of the total number of moles of metallic elements excluding Li on the surfaces of the second particles is greater than that of the first particles.Type: ApplicationFiled: September 22, 2020Publication date: April 1, 2021Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Ko, Shinya Suzuki, Fumiharu Niina, Sho Tsuruta, Natsumi Goto, Ryo Hanazaki
-
Patent number: 10930968Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a lithium transition metal oxide and a phosphoric acid compound. A nonaqueous electrolyte contains a dinitrile represented by a general formula: NC-A-CN (A represents a linear hydrocarbon having 1 to 10 carbon atoms or a hydrocarbon which contains a main chain having 1 to 10 carbon atoms and at least one side chain having 3 or less carbon atoms); an ether represented by a general formula: R1—O—R2—O—R3 (R1 and R3 each represent a group which contains a main chain having 1 to 3 carbon atoms, and R2 represents a chain hydrocarbon group having 1 to 3 carbon atoms); and a fluorophosphate salt.Type: GrantFiled: February 20, 2017Date of Patent: February 23, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Akihiko Takada, Fumiharu Niina, Katsunori Yanagida
-
Patent number: 10923713Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide, at least one element of a group 5 element and group 6 element in the periodic table, and a phosphoric acid compound. The nonaqueous electrolyte contains a lithium salt containing a P—O bond and a P—F bond.Type: GrantFiled: December 19, 2016Date of Patent: February 16, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiharu Niina, Takashi Ko, Katsunori Yanagida
-
Patent number: 10910633Abstract: A nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm3/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm3/g or less.Type: GrantFiled: January 26, 2018Date of Patent: February 2, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida, Yasunori Baba, Yuki Morikawa
-
Patent number: 10892472Abstract: A non-aqueous electrolyte secondary battery which uses a lithium titanium composite oxide as a negative electrode active material is configured to use a first positive electrode active material that is a Co-containing lithium transition metal oxide and has a volume per mass of 8 mm3/g or more with respect to pores having a pore diameter of 100 nm or less and a second positive electrode active material that has a volume per mass of 5 mm3/g or less with respect to pores having a pore diameter of 100 nm or less.Type: GrantFiled: December 11, 2017Date of Patent: January 12, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yuki Morikawa, Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Publication number: 20200403221Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode active material contains a titanium lithium complex oxide that has a lattice shrinkage in charged state of 98.5% or less. A negative electrode mix layer contains a polyacrylic acid or a salt thereof and includes a first layer and a second layer disposed successively from a negative electrode collector. Each of the first layer and the second layer contains a carbon-based negative electrode active material, and the ratio (B/A) of the D-band/G-band ratio (B) of the Raman spectrum of the second layer to the D-band/G-band ratio (A) of the Raman spectrum of the first layer is 2 to 10. The concentration of the polyacrylic acid or a salt thereof in the first layer is higher than the concentration of the polyacrylic acid or a salt thereof in the second layer.Type: ApplicationFiled: February 13, 2019Publication date: December 24, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fumiharu Niina, Kouhei Tsuzuki, Katsunori Yanagida
-
Patent number: 10868299Abstract: The present invention relates to a non-aqueous electrolyte secondary cell comprising: a positive electrode having a positive electrode mixture layer that contains a first positive-electrode active material and a second positive-electrode active material; a negative electrode containing a lithium-titanium composite oxide as a negative-electrode active material; and a non-aqueous electrolyte. The volume per mass of pores in the first positive-electrode active material having a pore diameter of 100 nm or less is four or more times the volume per mass of pores in the second positive-electrode active material having a pore diameter of 100 nm or less. The content of the first positive-electrode active material is 30 mass % or less with respect to the total amount of the first positive-electrode active material and the second positive-electrode active material.Type: GrantFiled: October 19, 2017Date of Patent: December 15, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Publication number: 20200266420Abstract: It is an object of the present disclosure to provide a nonaqueous electrolyte secondary battery with improved low-temperature power characteristics. A nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode according to the present invention contains a lithium transition metal oxide, at least one element of a group 5 element and group 6 element in the periodic table, and a phosphoric acid compound containing a metal element and hydrogen element.Type: ApplicationFiled: December 20, 2016Publication date: August 20, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Publication number: 20200152966Abstract: A positive electrode including a positive electrode current collector, an intermediate layer disposed on the positive electrode current collector and including a conductive agent and inorganic particles, and a positive electrode mixture layer disposed on the intermediate layer and including a positive electrode active material and a hydrogen phosphate salt represented by the general formula MaHbPO4 (wherein a satisfies 1?a?2, b satisfies 1?b?2, and M includes at least one element selected from alkali metals and alkaline earth metals), the positive electrode satisfying 0.5?X?3.0, 1.0?Y?7.0, and 0.07?X/Y?3.0 wherein X is the mass ratio (mass %) of the hydrogen phosphate salt relative to the total mass of the positive electrode active material and Y is the mass ratio (mass %) of the conductive agent relative to the total mass of the intermediate layer.Type: ApplicationFiled: September 28, 2018Publication date: May 14, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takashi Ko, Yasunori Baba, Katsunori Yanagida, Nobuhiro Hirano, Fumiharu Niina
-
Publication number: 20200144606Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a lithium transition metal oxide as a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte. The lithium transition metal oxide contains W and Si, and W and Si adhere to the surface of the carbon material constituting the negative electrode active material. The amount of W adhering to the surface of the carbon material is 2 times or less in terms of a molar ratio to the amount of Si adhering to the surface of the carbon material.Type: ApplicationFiled: February 9, 2018Publication date: May 7, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Fumiharu NIINA, Takashi KO, Katsunori YANAGIDA
-
Patent number: 10601029Abstract: It is an object to provide a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity is suppressed even when a positive electrode active material exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery contains a lithium transition metal oxide and is formed by mixing the lithium transition metal oxide, tungsten oxide, and a carbonate compound. The tungsten oxide is present on at least a part of a surface of the lithium transition metal oxide, and the mixed carbonate compound is present on a part of a surface of the tungsten oxide.Type: GrantFiled: August 25, 2015Date of Patent: March 24, 2020Assignee: SANYO Electric Co., Ltd.Inventors: Kenji Kibune, Fumiharu Niina
-
Publication number: 20200067074Abstract: This non-aqueous electrolyte secondary battery is provided with: a wound electrode body which comprises a positive electrode, a negative electrode and a separator, and wherein the positive electrode and the negative electrode are wound into a roll, with the separator being interposed therebetween; and a non-aqueous electrolyte. The negative electrode comprises a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector. The negative electrode mixture layer contains graphite, a carbon material that has a BET specific surface area of 10 m2/g or more, said BET specific surface area being larger than that of the graphite, and a hydrophobic binder. The coverage of the particle surfaces of the carbon material by the binder is higher than the coverage of the particle surfaces of the graphite by the binder.Type: ApplicationFiled: December 4, 2017Publication date: February 27, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kouhei Tuduki, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Publication number: 20200014023Abstract: A nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as a negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm3/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm3/g or less.Type: ApplicationFiled: January 26, 2018Publication date: January 9, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida, Yasunori Baba, Yuki Morikawa
-
Patent number: 10522877Abstract: There is provided a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity can be suppressed even when a positive electrode exposed to the air is used. A positive electrode for a nonaqueous electrolyte secondary battery according to an aspect of the present invention contains a lithium transition metal composite oxide represented by general formula Li1+xMnaMbO2+c (in the formula, x, a, b, and c satisfy x+a+b=1, 0<x?0.2, 0.09?a, and ?0.1?c?0.1, and M is at least one element selected from the group consisting of transition metal elements other than Mn, alkali metal elements, alkaline-earth metal elements, group 12 elements, group 13 elements, and group 14 elements) and also contains tungsten oxide and a phosphate compound.Type: GrantFiled: July 7, 2015Date of Patent: December 31, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Fumiharu Niina, Kazunari Ookita
-
Patent number: 10454107Abstract: A positive electrode for nonaqueous electrolyte secondary batteries and a nonaqueous electrolyte secondary battery are provided with which loss of initial efficiency can be limited even if a positive electrode exposed to air is used. An aspect of a positive electrode according to the present invention for nonaqueous electrolyte secondary batteries is a positive electrode for nonaqueous electrolyte secondary batteries incorporating a lithium transition metal oxide, wherein the positive electrode for nonaqueous electrolyte secondary batteries contains a tungsten compound and a boron compound. It is particularly preferred that the tungsten compound be a tungsten-containing oxide.Type: GrantFiled: March 12, 2015Date of Patent: October 22, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Fumiharu Niina, Takao Kokubu, Takeshi Ogasawara
-
Publication number: 20190305291Abstract: A non-aqueous electrolyte secondary battery which uses a lithium titanium composite oxide as a negative electrode active material is configured to use a first positive electrode active material that is a Co-containing lithium transition metal oxide and has a volume per mass of 8 mm3/g or more with respect to pores having a pore diameter of 100 nm or less and a second positive electrode active material that has a volume per mass of 5 mm3/g or less with respect to pores having a pore diameter of 100 nm or less.Type: ApplicationFiled: December 11, 2017Publication date: October 3, 2019Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuki Morikawa, Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Publication number: 20190245200Abstract: The present invention relates to a non-aqueous electrolyte secondary cell comprising: a positive electrode having a positive electrode mixture layer that contains a first positive-electrode active material and a second positive-electrode active material; a negative electrode containing a lithium-titanium composite oxide as a negative-electrode active material; and a non-aqueous electrolyte. The volume per mass of pores in the first positive-electrode active material having a pore diameter of 100 nm or less is four or more times the volume per mass of pores in the second positive-electrode active material having a pore diameter of 100 nm or less. The content of the first positive-electrode active material is 30 mass % or less with respect to the total amount of the first positive-electrode active material and the second positive-electrode active material.Type: ApplicationFiled: October 19, 2017Publication date: August 8, 2019Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida
-
Patent number: 10374205Abstract: It is an object of the present invention to improve the low-temperature output characteristics of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode assembly having a structure in which a positive electrode and a negative electrode are stacked with a porous separator provided therebetween. The positive electrode contains tungsten and a phosphate compound. The separator contains a material having higher oxidation resistance than a polyethylene and has a pore distribution peak sharpness index of 40 or more in the range of 0.01 ?m to 10 ?m as calculated using formula 1: formula 1: pore distribution peak sharpness index=(peak value of Log differential pore volume)/(difference between maximum pore size and minimum pore size at position corresponding to ½ peak value of Log differential pore volume).Type: GrantFiled: March 8, 2016Date of Patent: August 6, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Fumiharu Niina, Daisuke Nishide, Atsushi Fukui