公开(公告)号：US20200152966A1

公开(公告)日：2020-05-14

申请号：US16631049

申请日：2018-09-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takashi Ko ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano ,  Fumiharu Niina

IPC: H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/58

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.

公开(公告)号：US11005090B2

公开(公告)日：2021-05-11

申请号：US16466126

申请日：2017-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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.

公开(公告)号：US20200067074A1

公开(公告)日：2020-02-27

申请号：US16466126

申请日：2017-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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.

公开(公告)号：US20200014023A1

公开(公告)日：2020-01-09

申请号：US16483837

申请日：2018-01-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takashi Ko ,  Fumiharu Niina ,  Katsunori Yanagida ,  Yasunori Baba ,  Yuki Morikawa

IPC: H01M4/133 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583

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.

公开(公告)号：US20190305291A1

公开(公告)日：2019-10-03

申请号：US16471134

申请日：2017-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuki Morikawa ,  Yasunori Baba ,  Takashi Ko ,  Fumiharu Niina ,  Katsunori Yanagida

IPC: H01M4/131 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M4/505

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.

公开(公告)号：US20190245200A1

公开(公告)日：2019-08-08

申请号：US16343227

申请日：2017-10-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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.

公开(公告)号：US20180366724A1

公开(公告)日：2018-12-20

申请号：US15781759

申请日：2016-12-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Fumiharu Niina ,  Takashi Ko ,  Katsunori Yanagida

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M4/587

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.