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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：US11430983B2
公开(公告)日：2022-08-30
申请号：US16495937
申请日：2018-02-09
Inventor： Fumiharu Niina , Takashi Ko , Katsunori Yanagida
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a lithium transition metal oxide as a positive electrode active material, a negative electrode containing a carbon material as a negative electrode active material, and a nonaqueous electrolyte. The lithium transition metal oxide contains W and Si, and W and Si adhere to the surface of the carbon material constituting the negative electrode active material. The amount of W adhering to the surface of the carbon material is 2 times or less in terms of a molar ratio to the amount of Si adhering to the surface of the carbon material.
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公开(公告)号：US20220166007A1
公开(公告)日：2022-05-26
申请号：US17442219
申请日：2020-01-27
Inventor： Takashi Ko , Shinya Suzuki , Fumiharu Niina , Sho Tsuruta , Katsunori Yanagida
IPC: H01M4/36 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M4/58
Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a positive electrode active material A. The positive electrode active material A includes: a lithium transition metal composite oxide represented by a general formula of LiaNibCocMndAleMfOg (in the formula, M is at least one element selected from Groups IV, V, and VI, and 0.8≤a≤1.2, b≥0.82, 0
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公开(公告)号：US20200266420A1
公开(公告)日：2020-08-20
申请号：US15781578
申请日：2016-12-20
Inventor： Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/131 , H01M4/134 , H01M4/66 , H01M10/0525
Abstract: It is an object of the present disclosure to provide a nonaqueous electrolyte secondary battery with improved low-temperature power characteristics. A nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode according to the present invention 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 containing a metal element and hydrogen element.
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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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Patent Agency Ranking
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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7.发明公开公开(公告)号：US20240047645A1
公开(公告)日：2024-02-08
申请号：US18266753
申请日：2021-12-01
Inventor： Takashi Ko , Katsuya Inoue , Takeshi Ogasawara
CPC classification number: H01M4/131 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/4235 , H01M2004/028
Abstract: Provided is a positive electrode active substance that increases the discharge capacity of a battery. This positive electrode for a non-aqueous electrolyte secondary battery comprises a positive electrode current collector and a positive electrode mixture layer formed on the surface of the positive electrode current collector. The positive electrode mixture layer contains: a positive electrode active substance that includes a lithium transition metal complex oxide with a layered halite structure; and a phosphate. The lithium transition metal complex oxide contains at least nickel and aluminum, and calcium and/or strontium; the content ratio of nickel in the lithium transition metal complex oxide is at least 75 mol % relative to the total amount of metal elements other than lithium; and the phosphate content of the positive electrode mixture layer, if the positive electrode active substance content is 100 parts by mass, is 0.1-5 parts by mass.
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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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