公开(公告)号：US20210159498A1

公开(公告)日：2021-05-27

申请号：US16640128

申请日：2018-12-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M4/58 ,  H01M50/414 ,  H01M50/46 ,  H01M50/457 ,  H01M10/0525

Abstract: In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m2/g or more and 100 m2/g or less.

公开(公告)号：US11949097B2

公开(公告)日：2024-04-02

申请号：US17271348

申请日：2019-02-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/76 ,  H01M50/431 ,  H01M50/443

CPC classification number: H01M4/364 ,  H01M4/621 ,  H01M4/624 ,  H01M4/762 ,  H01M50/431 ,  H01M50/443

Abstract: In a nonaqueous electrolyte secondary battery a separator includes a porous substrate, a first filler layer, and a second filler layer. The first filler layer comprises phosphate particles having a BET specific surface area of 5 to 100 m2/g and polyvinylidene fluoride and is formed on a first surface that faces the positive electrode side of the substrate and contacts the positive electrode. The second filler comprises inorganic particles which have a melting point higher than that of the phosphate particles and is formed on at least one of a second surface that faces the negative electrode side of the substrate and the area between the substrate and the first filler layer. The content of the polyvinylidene fluoride in the first filler layer is 10 to 50 mass % and is higher in a region on the positive electrode side than in a region on the substrate side.

公开(公告)号：US11569493B2

公开(公告)日：2023-01-31

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: H01M4/58 ,  H01M4/136 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

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：US11509021B2

公开(公告)日：2022-11-22

申请号：US16637026

申请日：2018-07-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M4/00 ,  H01M50/46 ,  H01M4/136 ,  H01M50/44 ,  H01M50/431

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and a separator disposed between the positive electrode and the negative electrode, wherein the separator includes an inorganic filler layer which includes a first filler layer containing phosphate salt particles and a second filler layer disposed on the first filler layer and containing inorganic particles more heat resistant than the phosphate salt particles, and the BET specific surface area of the phosphate salt particles is in the range of not less than 5 m2/g and not more than 100 m2/g.

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：US10903485B2

公开(公告)日：2021-01-26

申请号：US16325557

申请日：2017-08-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanori Sugimori ,  Yasunori Baba ,  Katsunori Yanagida

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M4/62 ,  H01M4/60 ,  H01M10/0525 ,  H01M4/02

Abstract: A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and the negative electrode mixture layer contains a negative electrode active material containing lithium titanate, a binder, and a (meth)acrylic acid-based polymer. The amount of the (meth)acrylic acid-based polymer in the negative electrode mixture layer is 10 mass % or less relative to the total amount of the (meth)acrylic acid-based polymer and the binder. The amount of the (meth)acrylic acid-based polymer in a portion of the negative electrode mixture layer that extends from the surface to the middle of the negative electrode mixture layer in the thickness direction (upper region) is 60 mass % or more relative to the total amount of the (meth)acrylic acid-based polymer.

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：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.

公开(公告)号：US11942645B2

公开(公告)日：2024-03-26

申请号：US16640226

申请日：2018-11-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M4/66 ,  H01M2/16 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M50/417 ,  H01M50/423 ,  H01M50/431 ,  H01M50/434 ,  H01M50/451 ,  H01M50/457 ,  H01M50/46 ,  H01M4/02

CPC classification number: H01M4/668 ,  H01M4/366 ,  H01M4/58 ,  H01M4/624 ,  H01M10/0525 ,  H01M50/417 ,  H01M50/423 ,  H01M50/431 ,  H01M50/434 ,  H01M50/451 ,  H01M50/457 ,  H01M50/46 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.