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).
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Patent number: 10340525Abstract: A non-aqueous electrolyte secondary battery positive electrode capable of suppressing a decomposition reaction of an electrolyte solution in an overcharged state is provided. A non-aqueous electrolyte secondary battery positive electrode according to this embodiment includes a positive electrode active material layer which includes a positive electrode active material (54) containing a lithium transition metal oxide, a tungsten compound (56), a phosphoric acid compound (58) not in contact with the positive electrode active material (54), and an electrically conductive agent (52) in contact with the tungsten compound (56) and the phosphoric acid compound (58).Type: GrantFiled: January 21, 2016Date of Patent: July 2, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Yuu Takanashi, Fumiharu Niina, Atsushi Fukui, Takahiro Isono
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Patent number: 10340521Abstract: An object of the invention is to provide a nonaqueous electrolyte secondary battery having good cycle characteristics. The nonaqueous electrolyte secondary battery of the present invention includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a layered lithium transition metal oxide, and the positive electrode active material has a crystallite size of 140 nm or less. The negative electrode active material contains at least carbon, and the nonaqueous electrolyte contains 2 to 30% by volume of fluoroethylene carbonate.Type: GrantFiled: February 13, 2015Date of Patent: July 2, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Atsushi Ogata, Yoshiyuki Muraoka, Katsunori Yanagida, Masanobu Takeuchi, Fumiharu Niina
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Publication number: 20190181423Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5×10?2 MPa or more.Type: ApplicationFiled: July 28, 2017Publication date: June 13, 2019Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akihiko Takada, Sho Urata, Kouhei Tuduki, Fumiharu Niina, Katsunori Yanagida
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Patent number: 10256461Abstract: A nonaqueous electrolyte secondary battery of the invention includes a positive electrode, a negative electrode and a nonaqueous electrolyte, the positive electrode including lithium transition metal oxide particles as a positive electrode active material, the lithium transition metal oxide particles containing nickel as a main transition metal component and being such that a first compound containing at least one element Ma selected from the group consisting of Group IV elements and Group V elements is sintered to a portion of the surface of the lithium transition metal oxide particles, the first compound having a composition different from that of the lithium transition metal oxide particles, the positive electrode further including a second compound containing at least one element Mb selected from the group consisting of Group VI elements, the second compound having a composition different from that of the lithium transition metal oxide particles.Type: GrantFiled: August 29, 2013Date of Patent: April 9, 2019Assignee: SANYO Electric Co., Ltd.Inventors: Atsushi Mizawa, Fumiharu Niina, Daisuke Nishide, Hiroyuki Fujimoto, Yoshinori Kida
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Publication number: 20190044184Abstract: 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: ApplicationFiled: February 20, 2017Publication date: February 7, 2019Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akihiko Takada, Fumiharu Niina, Katsunori Yanagida
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Publication number: 20180366724Abstract: 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: ApplicationFiled: December 19, 2016Publication date: December 20, 2018Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumiharu Niina, Takashi Ko, Katsunori Yanagida
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Publication number: 20180212269Abstract: It is an object of the present disclosure to provide a nonaqueous electrolyte secondary battery with improved room-temperature regeneration. The present disclosure provides a nonaqueous electrolyte secondary battery that includes an electrode assembly having a structure in which a positive plate and a negative plate are stacked with a separator therebetween and also includes a nonaqueous electrolyte. The positive plate contains a lithium transition metal oxide, an element belonging to the group 5 or 6 of the periodic table, and a phosphoric acid compound. The nonaqueous electrolyte contains 1,2-dimethoxyethane.Type: ApplicationFiled: September 20, 2016Publication date: July 26, 2018Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akihiko Takada, Fumiharu Niina, Katsunori Yanagida
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Publication number: 20180034032Abstract: 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: ApplicationFiled: March 8, 2016Publication date: February 1, 2018Applicant: SANYO Electric Co., Ltd.Inventors: Fumiharu Niina, Daisuke Nishide, Atsushi Fukui
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Publication number: 20180019473Abstract: A non-aqueous electrolyte secondary battery positive electrode capable of suppressing a decomposition reaction of an electrolyte solution in an overcharged state is provided. A non-aqueous electrolyte secondary battery positive electrode according to this embodiment includes a positive electrode active material layer which includes a positive electrode active material (54) containing a lithium transition metal oxide, a tungsten compound (56), a phosphoric acid compound (58) not in contact with the positive electrode active material (54), and an electrically conductive agent (52) in contact with the tungsten compound (56) and the phosphoric acid compound (58).Type: ApplicationFiled: January 21, 2016Publication date: January 18, 2018Applicant: SANYO Electric Co., Ltd.Inventors: Yuu Takanashi, Fumiharu Niina, Atsushi Fukui, Takahiro Isono
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Publication number: 20170194628Abstract: 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: ApplicationFiled: August 25, 2015Publication date: July 6, 2017Applicant: Sanyo Electric Co., Ltd.Inventors: Kenji Kibune, Fumiharu Niina
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Publication number: 20170141441Abstract: 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: ApplicationFiled: July 7, 2015Publication date: May 18, 2017Applicant: Sanyo Electric Co., Ltd.Inventors: Fumiharu Niina, Kazunari Ookita
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Publication number: 20170062818Abstract: An object of the invention is to provide a nonaqueous electrolyte secondary battery having good cycle characteristics. The nonaqueous electrolyte secondary battery of the present invention includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a layered lithium transition metal oxide, and the positive electrode active material has a crystallite size of 140 nm or less. The negative electrode active material contains at least carbon, and the nonaqueous electrolyte contains 2 to 30% by volume of fluoroethylene carbonate.Type: ApplicationFiled: February 13, 2015Publication date: March 2, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Atsushi Ogata, Yoshiyuki Muraoka, Katsunori Yanagida, Masanobu Takeuchi, Fumiharu Niina
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Patent number: 9577247Abstract: A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.Type: GrantFiled: August 30, 2012Date of Patent: February 21, 2017Assignee: SANYO Electric Co., Ltd.Inventors: Daisuke Nishide, Fumiharu Niina, Hiroshi Kawada, Toshikazu Yoshida, Yoshinori Kida
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Publication number: 20170005333Abstract: 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: ApplicationFiled: March 12, 2015Publication date: January 5, 2017Applicant: SANYO Electric Co., Ltd.Inventors: Fumiharu Niina, Takao Kokubu, Takeshi Ogasawara
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Publication number: 20160301079Abstract: Provided is a positive electrode for nonaqueous electrolyte secondary batteries. The positive electrode allows the batteries to operate with a limited loss of initial efficiency even if the positive electrode has been exposed to air. In an aspect of a positive electrode for nonaqueous electrolyte secondary batteries according to the present invention, the positive electrode for nonaqueous electrolyte secondary batteries contains positive electrode active material particles and a boron compound. The positive electrode active material particles are composed of a lithium transition metal oxide and a rare earth compound adhering to the surface thereof.Type: ApplicationFiled: November 20, 2014Publication date: October 13, 2016Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takao Kokubu, Takeshi Ogasawara, Fumiharu Niina
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Publication number: 20160064738Abstract: An aspect of the invention resides in a nonaqueous electrolyte secondary battery (10) including a positive electrode (11), a negative electrode (12) and a nonaqueous electrolytic solution, the positive electrode including a positive electrode active material containing a lithium transition metal oxide having a rare earth compound attached on the surface, the nonaqueous electrolytic solution including an aromatic compound having an oxidative decomposition potential in the range of 4.2 to 5.0 V vs. Li/Li+. The rare earth compound is preferably a rare earth hydroxide, a rare earth oxyhydroxide or a rare earth oxide.Type: ApplicationFiled: March 20, 2014Publication date: March 3, 2016Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takatoshi Higuchi, Fumiharu Niina, Daisuke Nishide, Hiroyuki Fujimoto
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Publication number: 20160020459Abstract: The present invention has a main object to improve the thermal stability of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an aspect of the present invention includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a positive electrode active material and a metal fluoride. The positive electrode active material contains particles of a lithium transition metal oxide. At least one portion of the surface of each of the lithium transition metal oxide particles has a rare-earth compound attached thereto. The nonaqueous electrolyte contains a fluorine-containing lithium salt. The rare-earth compound is preferably a hydroxide, an oxyhydroxide, or an oxide.Type: ApplicationFiled: March 13, 2014Publication date: January 21, 2016Applicant: SANYO Electric Co., Ltd.Inventors: Daisuke Nishide, Atsushi Mizawa, Fumiharu Niina, Hiroyuki Fujimoto, Takeshi Ogasawara
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Publication number: 20150221933Abstract: A nonaqueous electrolyte secondary battery of the invention includes a positive electrode, a negative electrode and a nonaqueous electrolyte, the positive electrode including lithium transition metal oxide particles as a positive electrode active material, the lithium transition metal oxide particles containing nickel as a main transition metal component and being such that a first compound containing at least one element Ma selected from the group consisting of Group IV elements and Group V elements is sintered to a portion of the surface of the lithium transition metal oxide particles, the first compound having a composition different from that of the lithium transition metal oxide particles, the positive electrode further including a second compound containing at least one element Mb selected from the group consisting of Group VI elements, the second compound having a composition different from that of the lithium transition metal oxide particles.Type: ApplicationFiled: August 29, 2013Publication date: August 6, 2015Applicant: SANYO ELECTRIC CO., LTD.Inventors: Atsushi Mizawa, Fumiharu Niina, Daisuke Nishide, Hiroyuki Fujimoto, Yoshinori Kida
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Publication number: 20140329146Abstract: A positive-electrode active material of a nonaqueous electrolyte secondary battery is modified to improve the output characteristics under various temperature conditions, thereby making the nonaqueous electrolyte secondary battery suitable for a power supply for hybrid vehicles. The nonaqueous electrolyte secondary battery includes a working electrode 11, a counter electrode 12 containing a negative-electrode active material, and a nonaqueous electrolyte solution 14. In the working electrode 11, a positive-electrode mixture layer containing a granular positive-electrode active material and a binder is disposed on both sides of a positive-electrode collector. The positive-electrode active material contains a lithium transition metal oxide Li1.07Ni0.46Co0.19Mn0.28O2 and a tungsten trioxide attached to part of the surface of the lithium transition metal oxide.Type: ApplicationFiled: June 29, 2012Publication date: November 6, 2014Applicant: SANYO ELECTRIC CO., LTD.Inventors: Fumiharu Niina, Hiroshi Kawada, Toshikazu Yoshida, Yoshinori Kida
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Publication number: 20140227599Abstract: A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.Type: ApplicationFiled: August 30, 2012Publication date: August 14, 2014Applicant: SANYO ELECTRIC CO., LTD.Inventors: Daisuke Nishide, Fumiharu Niina, Hiroshi Kawada, Toshikazu Yoshida, Yoshinori Kida