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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：US11949097B2
公开(公告)日：2024-04-02
申请号：US17271348
申请日：2019-02-25
Inventor： Yasunori Baba , Masanori Sugimori , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M4/36 , H01M4/62 , H01M4/76 , H01M50/431 , H01M50/443
CPC classification number: H01M4/364 , H01M4/621 , H01M4/624 , H01M4/762 , H01M50/431 , H01M50/443
Abstract: In a nonaqueous electrolyte secondary battery a separator includes a porous substrate, a first filler layer, and a second filler layer. The first filler layer comprises phosphate particles having a BET specific surface area of 5 to 100 m2/g and polyvinylidene fluoride and is formed on a first surface that faces the positive electrode side of the substrate and contacts the positive electrode. The second filler comprises inorganic particles which have a melting point higher than that of the phosphate particles and is formed on at least one of a second surface that faces the negative electrode side of the substrate and the area between the substrate and the first filler layer. The content of the polyvinylidene fluoride in the first filler layer is 10 to 50 mass % and is higher in a region on the positive electrode side than in a region on the substrate side.
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公开(公告)号：US11569493B2
公开(公告)日：2023-01-31
申请号：US16631049
申请日：2018-09-28
Inventor： Takashi Ko , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano , Fumiharu Niina
Abstract: 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.
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公开(公告)号：US11509021B2
公开(公告)日：2022-11-22
申请号：US16637026
申请日：2018-07-27
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M4/00 , H01M50/46 , H01M4/136 , H01M50/44 , H01M50/431
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes an inorganic filler layer which includes a first filler layer containing phosphate salt particles and a second filler layer disposed on the first filler layer and containing inorganic particles more heat resistant than the phosphate salt particles, and the BET specific surface area of the phosphate salt particles is in the range of not less than 5 m2/g and not more than 100 m2/g.
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Patent Agency Ranking
公开(公告)号：US20210288311A1
公开(公告)日：2021-09-16
申请号：US16326507
申请日：2017-09-15
Inventor： Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/36 , H01M4/525 , H01M4/505 , H01M4/485 , H01M10/0525
Abstract: A positive electrode for nonaqueous electrolyte secondary batteries which contains a first positive electrode active material, a second positive electrode active material and a phosphoric acid compound. With respect to the first positive electrode active material, the volume per mass of pores having a pore diameter of 100 nm or less is 8 mm3/g or more. With respect to the second positive electrode active material, the volume per mass of pores having a pore diameter of 100 nm or less is 5 mm3/g or less. In addition, the volume per mass of pores having a pore diameter of 100 nm or less of the first positive electrode active material is four times or more the volume per mass of pores having a pore diameter of 100 nm or less of the second positive electrode active material.
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公开(公告)号：US20210257702A1
公开(公告)日：2021-08-19
申请号：US17271103
申请日：2019-02-25
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M50/457 , H01M50/431 , H01M50/443 , H01M50/417
Abstract: In a nonaqueous electrolyte secondary battery which is an example of the embodiment of the present invention, a separator comprises a porous base material, a first filler layer that includes phosphate particles and is formed on one side of the base material, and a second filler layer that includes inorganic particles which have a melting point that is higher than that of the phosphate particles and is formed on the other side of the base material. The volume-based 10% particle size (D10) of the phosphate particles is 0.02 to 0.5 μm and is smaller than the average pore size of the base material. A portion of the phosphate particles penetrates into voids of the base material, and an average value of penetration depth of the particles is 0.1 to 2 μm.
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公开(公告)号：US10923713B2
公开(公告)日：2021-02-16
申请号：US15781759
申请日：2016-12-19
Inventor： Fumiharu Niina , Takashi Ko , Katsunori Yanagida
IPC: H01M4/36 , H01M4/525 , H01M4/505 , H01M10/0525 , H01M4/587 , H01M10/0568 , H01M4/485 , H01M4/58 , H01M4/02
Abstract: 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.
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公开(公告)号：US10903485B2
公开(公告)日：2021-01-26
申请号：US16325557
申请日：2017-08-22
Inventor： Masanori Sugimori , Yasunori Baba , Katsunori Yanagida
Abstract: A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and the negative electrode mixture layer contains a negative electrode active material containing lithium titanate, a binder, and a (meth)acrylic acid-based polymer. The amount of the (meth)acrylic acid-based polymer in the negative electrode mixture layer is 10 mass % or less relative to the total amount of the (meth)acrylic acid-based polymer and the binder. The amount of the (meth)acrylic acid-based polymer in a portion of the negative electrode mixture layer that extends from the surface to the middle of the negative electrode mixture layer in the thickness direction (upper region) is 60 mass % or more relative to the total amount of the (meth)acrylic acid-based polymer.
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10.发明申请公开(公告)号：US20200152966A1
公开(公告)日：2020-05-14
申请号：US16631049
申请日：2018-09-28
Inventor： Takashi Ko , Yasunori Baba , Katsunori Yanagida , Nobuhiro Hirano , Fumiharu Niina
Abstract: 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.
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