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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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Patent Agency Ranking
公开(公告)号：US20210249649A1
公开(公告)日：2021-08-12
申请号：US17271348
申请日：2019-02-25
Inventor： Yasunori Baba , Masanori Sugimori , Katsunori Yanagida , Nobuhiro Hirano
IPC: H01M4/36 , H01M4/62 , H01M50/431 , H01M4/76
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：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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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：US20190245200A1
公开(公告)日：2019-08-08
申请号：US16343227
申请日：2017-10-19
Inventor： Yasunori Baba , Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/36 , H01M4/485 , H01M4/525 , H01M4/505 , H01M10/0525
CPC classification number: H01M4/364 , H01M4/131 , H01M4/36 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M2004/021 , Y02E60/122 , Y02T10/7011
Abstract: 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.
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26.发明申请公开(公告)号：US20190214635A1
公开(公告)日：2019-07-11
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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