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.

公开(公告)号：US20220131232A1

公开(公告)日：2022-04-28

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 ,  H01M50/449 ,  H01M50/443 ,  H01M50/426 ,  H01M50/431

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：US20210249649A1

公开(公告)日：2021-08-12

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 ,  H01M50/431 ,  H01M4/76

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.