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公开(公告)号：US20180309116A1
公开(公告)日：2018-10-25
申请号：US15770581
申请日：2016-11-21
Inventor： Natsumi Goto , Masanori Sugimori , Kouhei Tuduki , Katsunori Yanagida
IPC: H01M4/36 , H01M10/0525 , H01M10/0569 , H01M4/525 , H01M4/587
CPC classification number: H01M4/364 , H01M4/366 , H01M4/485 , H01M4/525 , H01M4/587 , H01M4/62 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M2300/0028 , H01M2300/0037 , Y02E60/122 , Y02T10/7011
Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).
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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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公开(公告)号：US10553856B2
公开(公告)日：2020-02-04
申请号：US15770581
申请日：2016-11-21
Inventor： Natsumi Goto , Masanori Sugimori , Kouhei Tuduki , Katsunori Yanagida
IPC: H01M6/16 , H01M4/36 , H01M4/485 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M4/587
Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).
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公开(公告)号：US10535877B2
公开(公告)日：2020-01-14
申请号：US15736066
申请日：2016-09-20
Inventor： Kouhei Tuduki , Atsushi Fukui , Katsunori Yanagida
IPC: H01M4/587 , H01M4/583 , H01M4/36 , H01M4/62 , H01M10/0525 , H01M4/48 , H01M4/133 , H01M4/38 , H01M4/58 , H01M4/02
Abstract: A non-aqueous electrolyte secondary battery includes a non-aqueous electrolyte and an electrode body in which a positive electrode plate and a negative electrode plate are layered with a separator interposed therebetween. The positive electrode plate contains a phosphate compound. The negative electrode plate contains a graphite-based material, an amorphous/non-crystalline carbon material, and a rubber-based binder. The ratio of the coverage of the rubber-based binder on the amorphous/non-crystalline carbon material to the coverage of the rubber-based binder on the graphite-based material is more than 0 and 0.5 or less.
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公开(公告)号：US20190044179A1
公开(公告)日：2019-02-07
申请号：US16074986
申请日：2017-01-26
Inventor： Masanori Sugimori , Kouhei Tuduki , Katsunori Yanagida
Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode mixture layer of a positive electrode contains a lithium transition metal oxide containing at least nickel (Ni), cobalt (Co), manganese (Mn), and tungsten (W). A negative electrode mixture layer of a negative electrode contains lithium titanate and a group-5 group-6oxide that is an oxide containing at least one selected from a group consisting of group 5 elements and group 6 elements.
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Patent Agency Ranking
公开(公告)号：US11005090B2
公开(公告)日：2021-05-11
申请号：US16466126
申请日：2017-12-04
Inventor： Kouhei Tuduki , Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/133 , H01M4/62 , H01M10/0525 , H01M4/02
Abstract: This non-aqueous electrolyte secondary battery is provided with: a wound electrode body which comprises a positive electrode, a negative electrode and a separator, and wherein the positive electrode and the negative electrode are wound into a roll, with the separator being interposed therebetween; and a non-aqueous electrolyte. The negative electrode comprises a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector. The negative electrode mixture layer contains graphite, a carbon material that has a BET specific surface area of 10 m2/g or more, said BET specific surface area being larger than that of the graphite, and a hydrophobic binder. The coverage of the particle surfaces of the carbon material by the binder is higher than the coverage of the particle surfaces of the graphite by the binder.
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7.发明申请公开(公告)号：US20200067074A1
公开(公告)日：2020-02-27
申请号：US16466126
申请日：2017-12-04
Inventor： Kouhei Tuduki , Takashi Ko , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/133 , H01M10/0525 , H01M4/62
Abstract: This non-aqueous electrolyte secondary battery is provided with: a wound electrode body which comprises a positive electrode, a negative electrode and a separator, and wherein the positive electrode and the negative electrode are wound into a roll, with the separator being interposed therebetween; and a non-aqueous electrolyte. The negative electrode comprises a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector. The negative electrode mixture layer contains graphite, a carbon material that has a BET specific surface area of 10 m2/g or more, said BET specific surface area being larger than that of the graphite, and a hydrophobic binder. The coverage of the particle surfaces of the carbon material by the binder is higher than the coverage of the particle surfaces of the graphite by the binder.
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公开(公告)号：US20190181423A1
公开(公告)日：2019-06-13
申请号：US16321900
申请日：2017-07-28
Inventor： Akihiko Takada , Sho Urata , Kouhei Tuduki , Fumiharu Niina , Katsunori Yanagida
IPC: H01M4/131 , H01M10/0525 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M4/36
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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公开(公告)号：US20180183042A1
公开(公告)日：2018-06-28
申请号：US15736066
申请日：2016-09-20
Inventor： Kouhei Tuduki , Atsushi Fukui , Katsunori Yanagida
CPC classification number: H01M4/587 , H01M4/133 , H01M4/366 , H01M4/38 , H01M4/483 , H01M4/5825 , H01M4/583 , H01M4/62 , H01M4/622 , H01M4/625 , H01M10/0525 , H01M2004/027 , H01M2004/028 , H01M2220/20 , Y02T10/7011
Abstract: A non-aqueous electrolyte secondary battery includes a non-aqueous electrolyte and an electrode body in which a positive electrode plate and a negative electrode plate are layered with a separator interposed therebetween. The positive electrode plate contains a phosphate compound. The negative electrode plate contains a graphite-based material, an amorphous/non-crystalline carbon material, and a rubber-based binder. The ratio of the coverage of the rubber-based binder on the amorphous/non-crystalline carbon material to the coverage of the rubber-based binder on the graphite-based material is more than 0 and 0.5 or less.
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公开(公告)号：US20190173085A1
公开(公告)日：2019-06-06
申请号：US15772701
申请日：2016-11-21
Inventor： Masanori Sugimori , Natsumi Goto , Kouhei Tuduki , Katsunori Yanagida
IPC: H01M4/525 , H01M10/0525 , H01M4/485
Abstract: A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a first lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li; a second lithium transition metal oxide in which Co and Ni account for 60 mole percent or more and 20 mole percent or less, respectively, of the total molar amount of metal elements excluding Li; and tungsten element. The negative electrode contains a lithium-titanium composite oxide.
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