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公开(公告)号：US12040476B2
公开(公告)日：2024-07-16
申请号：US17296487
申请日：2019-11-11
Inventor： Kouhei Tsuzuki , Yuki Morikawa , Hirokazu Wada , Katsunori Yanagida
CPC classification number: H01M4/133 , H01M4/134 , H01M4/386 , H01M4/587 , H01M4/624 , H01M10/0525 , H01M2004/027
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 carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in 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 is smaller than that of the carboxymethyl cellulose in 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.
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公开(公告)号：US12027708B2
公开(公告)日：2024-07-02
申请号：US17296481
申请日：2019-11-11
Inventor： Kouhei Tsuzuki , Yuki Morikawa , Hirokazu Wada , Katsunori Yanagida
CPC classification number: H01M4/62 , H01M4/133 , H01M4/587 , H01M2004/027
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：US20220037640A1
公开(公告)日：2022-02-03
申请号：US17296487
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 carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in 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 is smaller than that of the carboxymethyl cellulose in 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.
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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：US20200014023A1
公开(公告)日：2020-01-09
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 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.
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Patent Agency Ranking
公开(公告)号：US20190305291A1
公开(公告)日：2019-10-03
申请号：US16471134
申请日：2017-12-11
Inventor： Yuki Morikawa , Yasunori Baba , Takashi Ko , Fumiharu Niina , Katsunori Yanagida
Abstract: 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.
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公开(公告)号：US12224452B2
公开(公告)日：2025-02-11
申请号：US16637034
申请日：2018-11-02
Inventor： Yuki Morikawa , Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M2/16 , H01M4/131 , H01M4/36 , H01M4/58 , H01M4/66 , H01M10/0525 , H01M50/417 , H01M50/423 , H01M50/451 , H01M50/457 , H01M50/46 , H01M4/02
Abstract: In a nonaqueous electrolyte secondary battery, a separator includes a substrate, a first filler layer disposed on one side of the substrate and containing phosphate salt particles, and a second filler layer disposed on the other side of the substrate and containing inorganic particles. The separator is disposed between a positive electrode and a negative electrode in such a manner that the side of the substrate which bears the first filler layer is directed to the positive electrode side.
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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：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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