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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：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：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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4.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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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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Patent Agency Ranking
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：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：US20230335717A1
公开(公告)日：2023-10-19
申请号：US18027802
申请日：2021-08-18
Inventor： Natsumi Goto , Takashi Ko , Sho Tsuruta , Kohei Kintsu , Fumiharu Niina
CPC classification number: H01M4/366 , H01M4/525 , H01M4/505 , H01M4/131 , H01M2004/028
Abstract: Provided is a non-aqueous electrolyte secondary battery, wherein: a positive electrode active material includes a lithium transition metal composite oxide containing at least Ni, Mn, and B; 80 mol %≤Ni≤95 mol %; 0 mol %
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公开(公告)号：US20230290939A1
公开(公告)日：2023-09-14
申请号：US18032431
申请日：2021-10-29
Inventor： Yuji Goshima , Yuta Kuroda , Fumiharu Niina , Tatsuro Sasa
Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte, while being characterized in that: the negative electrode comprises a negative electrode active material that contains an Si-containing material; the Si-containing material contains a first Si-containing material which comprises a silicate phase and silicon particles that are dispersed in the silicate phase, and a second Si-containing material which comprises a carbon phase and silicon particles that are dispersed in the carbon phase; and the difference between the initial charge/discharge efficiency (Efc) of the positive electrode and the initial charge/discharge efficiency (Efa) of the negative electrode, namely (Efc−Efa) satisfies 1%
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公开(公告)号：US10892472B2
公开(公告)日：2021-01-12
申请号：US16471134
申请日：2017-12-11
Inventor： Yuki Morikawa , Yasunori Baba , Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/131 , H01M4/133 , H01M4/525 , H01M4/587 , H01M10/0525 , H01M4/505 , H01M10/0567 , H01M4/62 , H01M4/485 , H01M4/13 , H01M10/052 , H01M4/36
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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