公开(公告)号：US20210257702A1

公开(公告)日：2021-08-19

申请号：US17271103

申请日：2019-02-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M50/457 ,  H01M50/431 ,  H01M50/443 ,  H01M50/417

Abstract: In a nonaqueous electrolyte secondary battery which is an example of the embodiment of the present invention, a separator comprises a porous base material, a first filler layer that includes phosphate particles and is formed on one side of the base material, and a second filler layer that includes inorganic particles which have a melting point that is higher than that of the phosphate particles and is formed on the other side of the base material. The volume-based 10% particle size (D10) of the phosphate particles is 0.02 to 0.5 μm and is smaller than the average pore size of the base material. A portion of the phosphate particles penetrates into voids of the base material, and an average value of penetration depth of the particles is 0.1 to 2 μm.

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：US09614249B2

公开(公告)日：2017-04-04

申请号：US14516903

申请日：2014-10-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Isao Fujiwara ,  Nobuhiro Hirano ,  Masaru Watanabe

IPC: H01M2/16 ,  H01M10/05 ,  H01M10/052

CPC classification number: H01M10/05 ,  H01M2/162 ,  H01M2/1626 ,  H01M2/1653 ,  H01M2/1686 ,  H01M10/052

Abstract: A separator according to the present disclosure is a separator for a non-aqueous electrolyte secondary battery that includes a porous layer that contains cellulose fibers and resin particles. The ratio of the amount of the resin particles to the total amount of the cellulose fibers and the resin particles increases with decreasing distance from one surface of the porous layer.

公开(公告)号：US20240128440A1

公开(公告)日：2024-04-18

申请号：US18277868

申请日：2022-01-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Nobuhiro Hirano ,  Yusuke Fukumoto ,  Masanori Sugimori ,  Yuji Yokoyama

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/386 ,  H01M4/583 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/027

Abstract: This negative electrode for a lithium ion secondary battery is characterized by comprising a negative electrode mixture layer containing a carbon-based negative electrode active material, a Si-based negative electrode active material, and carbon nanotubes, wherein when 100 is the ratio at which the carbon nanotubes coat the surface of the Si-based negative electrode active material, the ratio at which the carbon nanotubes coat the surface of the carbon-based negative electrode active material is at least 20 but no higher than 50.

公开(公告)号：US20240055613A1

公开(公告)日：2024-02-15

申请号：US18267304

申请日：2021-11-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yusuke Fukumoto ,  Nobuhiro Hirano ,  Masanori Sugimori ,  Yuji Yokoyama

IPC: H01M4/62 ,  C01B32/174 ,  C09D5/24 ,  C09D7/61 ,  C09D101/28 ,  H01M4/587 ,  H01M4/38 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36

CPC classification number: H01M4/625 ,  C01B32/174 ,  C09D5/24 ,  C09D7/61 ,  C09D101/286 ,  H01M4/587 ,  H01M4/386 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  C01B2202/22 ,  C01P2006/22 ,  C01B2202/28 ,  C01P2004/62 ,  C01P2004/61 ,  C01P2004/53

Abstract: Provided is an electrode slurry carbon nanotube liquid dispersion which improves charge/discharge cycle characteristics. An electrode slurry carbon nanotube liquid dispersion which is one aspect of the present disclosure and contains 0.1-1.5 mass % of carbon nanotubes, a dispersion medium, and carboxymethyl cellulose, the viscosity of which at 100 s−1 in a 3% aqueous solution is 2-200 mPa·s, wherein: the carboxymethyl cellulose content constitutes 50-250 parts by mass relative to 100 parts by mass of carbon nanotubes; the viscosity at 100 s−1 is 50-200 mPa·s in a state in which the carbon nanotubes are dispersed; and the particle distribution according to the laser diffraction method exhibits a D10 of 0.3-1.0 μm, a D50 of 3-10 μm and a D90 of 60 μm or less in a state in which the carbon nanotubes are dispersed.

公开(公告)号：US20220102808A1

公开(公告)日：2022-03-31

申请号：US17430155

申请日：2020-01-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M50/431 ,  H01M50/443 ,  H01M50/426

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 inorganic particles having a higher heat resistance than the phosphate particles. 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 is 5 m2/g to 100 m2/g, inclusive, and is greater than the BET specific surface area of the inorganic particles. The D50 particle size (D50) of the inorganic particles on a volume basis is greater than the D50 particle size (D50) of the phosphate particles on a volume basis.

公开(公告)号：US20220029243A1

公开(公告)日：2022-01-27

申请号：US17414199

申请日：2019-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M50/423 ,  H01M10/0525

Abstract: This non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The separator includes: a porous base material; a first filler layer which contains phosphate particles as a primary component and is arranged on one surface of the base material; and a second filler layer which is disposed between the base material and the first filler layer and which contains at least one type of compound selected from the group consisting of an aromatic polyamide, an aromatic polyimide and an aromatic polyiamideimide. The BET specific surface area of the phosphate particles is 5-100 m2/g. The content of the aforementioned compounds in the second filler layer is 15 mass % or greater.

公开(公告)号：US20200243827A1

公开(公告)日：2020-07-30

申请号：US16637034

申请日：2018-11-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuki Morikawa ,  Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M2/16 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/66 ,  H01M4/36 ,  H01M4/131

Abstract: In a nonaqueous electrolyte secondary battery, a separator includes a substrate, a first filler layer disposed on one side of the substrate and containing phosphate salt particles, and a second filler layer disposed on the other side of the substrate and containing inorganic particles. The separator is disposed between a positive electrode and a negative electrode in such a manner that the side of the substrate which bears the first filler layer is directed to the positive electrode side.

公开(公告)号：US12142789B2

公开(公告)日：2024-11-12

申请号：US17430355

申请日：2020-01-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M50/446 ,  H01M50/409 ,  H01M50/426 ,  H01M50/431 ,  H01M50/443 ,  H01M50/449

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.

公开(公告)号：US12132225B2

公开(公告)日：2024-10-29

申请号：US17414172

申请日：2019-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida ,  Nobuhiro Hirano

IPC: H01M50/446 ,  H01M4/02 ,  H01M10/0525 ,  H01M50/443 ,  H01M50/449

CPC classification number: H01M50/446 ,  H01M50/443 ,  H01M50/449 ,  H01M2004/028 ,  H01M10/0525

Abstract: This non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The separator includes; a porous base material; a first filler layer which contains phosphate particles as a primary component and is arranged on one surface of the base material; and a second filler layer which is arranged on the other surface of the base material and which contains at least one type of compound selected from the group consisting of an aromatic polyamide, an aromatic polyimide and an aromatic polyamideimide. The BET specific surface area of the phosphate particles is 5-100 m2/g. The content of the aforementioned compounds in the second filler layer 32 is 15 mass % or more.