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公开(公告)号：US20220029165A1
公开(公告)日：2022-01-27
申请号：US17296481
申请日：2019-11-11
Inventor： Kouhei Tsuzuki , Yuki Morikawa , Hirokazu Wada , Katsunori Yanagida
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and polyvinylpyrrolidone, and an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector has a higher polyvinylpyrrolidone content than an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.
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公开(公告)号：US11024837B2
公开(公告)日：2021-06-01
申请号：US16321900
申请日：2017-07-28
Inventor： Akihiko Takada , Sho Urata , Kouhei Tuduki , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/131 , H01M4/133 , H01M4/1393 , H01M4/36 , H01M10/0525 , H01M10/0587 , H01M4/587 , H01M4/62 , H01M4/1391
Abstract: 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.
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公开(公告)号：US10910633B2
公开(公告)日：2021-02-02
申请号：US16483837
申请日：2018-01-26
Inventor： Takashi Ko , Fumiharu Niina , Katsunori Yanagida , Yasunori Baba , Yuki Morikawa
Abstract: 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.
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公开(公告)号：US20200251744A1
公开(公告)日：2020-08-06
申请号：US16640226
申请日：2018-11-02
Inventor： Akihiko Takada , Masanori Sugimori , Nobuhiro Hirano , Yuki Morikawa , Yasunori Baba , Katsunori Yanagida
Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.
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公开(公告)号：US10553856B2
公开(公告)日：2020-02-04
申请号：US15770581
申请日：2016-11-21
Inventor： Natsumi Goto , Masanori Sugimori , Kouhei Tuduki , Katsunori Yanagida
IPC: H01M6/16 , H01M4/36 , H01M4/485 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M4/587
Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).
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Patent Agency Ranking
公开(公告)号：US20180212269A1
公开(公告)日：2018-07-26
申请号：US15743395
申请日：2016-09-20
Inventor： Akihiko Takada , Fumiharu Niina , Katsunori Yanagida
IPC: H01M10/052 , H01M10/0569 , H01M10/0567 , H01M10/0587 , H01M10/04 , H01M4/66 , H01M4/131 , H01M4/485 , H01M4/50 , H01M4/52
CPC classification number: H01M10/052 , H01M4/131 , H01M4/485 , H01M4/50 , H01M4/52 , H01M4/5825 , H01M4/662 , H01M10/0459 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M10/0587 , H01M2004/027 , H01M2004/028 , H01M2220/30 , H01M2300/0028 , H01M2300/0068 , Y02E60/122 , Y02T10/7011
Abstract: 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.
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公开(公告)号：US12142789B2
公开(公告)日：2024-11-12
申请号：US17430355
申请日：2020-01-27
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M50/446 , H01M50/409 , H01M50/426 , H01M50/431 , H01M50/443 , H01M50/449
Abstract: A separator for use in a non-aqueous electrolyte secondary battery according to the present invention comprises a porous substrate and a filler layer disposed upon the substrate. The filler layer includes phosphate particles and a reticulated polyvinylidene fluoride resin. The filler layer has a polyvinylidene fluoride resin content of 15 mass % to 40 mass %, inclusive. The D10 particle size (D10) of the phosphate particles on a volume basis is 0.02 μm to 0.5 μm, inclusive, and is smaller than the average pore size of the pores in the substrate. The BET specific surface area of the phosphate particles 30 is 5 m2/g to 100 m2/g, inclusive.
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公开(公告)号：US12132225B2
公开(公告)日：2024-10-29
申请号：US17414172
申请日：2019-12-11
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M50/446 , H01M4/02 , H01M10/0525 , H01M50/443 , H01M50/449
CPC classification number: H01M50/446 , H01M50/443 , H01M50/449 , H01M2004/028 , H01M10/0525
Abstract: This non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The separator includes; a porous base material; a first filler layer which contains phosphate particles as a primary component and is arranged on one surface of the base material; and a second filler layer which is arranged on the other surface of the base material and which contains at least one type of compound selected from the group consisting of an aromatic polyamide, an aromatic polyimide and an aromatic polyamideimide. The BET specific surface area of the phosphate particles is 5-100 m2/g. The content of the aforementioned compounds in the second filler layer 32 is 15 mass % or more.
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公开(公告)号：US11942645B2
公开(公告)日：2024-03-26
申请号：US16640226
申请日：2018-11-02
Inventor： Akihiko Takada , Masanori Sugimori , Nobuhiro Hirano , Yuki Morikawa , Yasunori Baba , Katsunori Yanagida
IPC: H01M4/66 , H01M2/16 , H01M4/36 , H01M4/58 , H01M4/62 , H01M10/0525 , H01M50/417 , H01M50/423 , H01M50/431 , H01M50/434 , H01M50/451 , H01M50/457 , H01M50/46 , H01M4/02
CPC classification number: H01M4/668 , H01M4/366 , H01M4/58 , H01M4/624 , H01M10/0525 , H01M50/417 , H01M50/423 , H01M50/431 , H01M50/434 , H01M50/451 , H01M50/457 , H01M50/46 , H01M2004/021 , H01M2004/027 , H01M2004/028
Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.
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公开(公告)号：US20220131232A1
公开(公告)日：2022-04-28
申请号：US17430355
申请日：2020-01-27
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M50/446 , H01M50/449 , H01M50/443 , H01M50/426 , H01M50/431
Abstract: A separator for use in a non-aqueous electrolyte secondary battery according to the present invention comprises a porous substrate and a filler layer disposed upon the substrate. The filler layer includes phosphate particles and a reticulated polyvinylidene fluoride resin. The filler layer has a polyvinylidene fluoride resin content of 15 mass % to 40 mass %, inclusive. The D10 particle size (D10) of the phosphate particles on a volume basis is 0.02 μm to 0.5 μm, inclusive, and is smaller than the average pore size of the pores in the substrate. The BET specific surface area of the phosphate particles 30 is 5 m2/g to 100 m2/g, inclusive.
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