公开(公告)号：US20230025305A1

公开(公告)日：2023-01-26

申请号：US17782724

申请日：2020-12-01

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Chisaki Fujitomo ,  Tasuku Ishiguro

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/38 ,  H01M4/583

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer supported by the negative electrode current collector, when dividing the negative electrode active material layer into two layers of a first region and a second region having the same thickness, the second region is closer to the negative electrode current collector than the first region, the first region and the second region each contains graphite particles, a ratio P1/P2 of interparticle porosity P1 of the first region to interparticle porosity P2 of the second region is greater than 1, and the nonaqueous electrolyte includes at least one additive selected from the group consisting of a sulfite compound and a sulfate compound.

公开(公告)号：US20230395794A1

公开(公告)日：2023-12-07

申请号：US18034175

申请日：2021-10-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tasuku Ishiguro ,  Yuanlong Zhong ,  Chisaki Fujitomo

IPC: H01M4/525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/505

Abstract: A non-aqueous liquid electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, in which the positive electrode includes a positive electrode active material, and a carbon nanotube, the positive electrode active material includes a lithium-transition metal composite oxide containing Ni, a proportion of Ni in metal elements other than Li in the lithium-transition metal composite oxide is 80 atm % or more, and the non-aqueous electrolyte includes a fluorosulfonic acid salt.

公开(公告)号：US20230035623A1

公开(公告)日：2023-02-02

申请号：US17784463

申请日：2020-12-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Tasuku Ishiguro ,  Shunsuke Nambuya

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/36

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the negative electrode includes a negative electrode current collector, and a negative electrode active material layer supported by the negative electrode current collector and containing a silicon material as a negative electrode active material; when dividing the negative electrode active material layer into two layers of a first region and a second region having the same thickness, the second region is closer to the negative electrode current collector than the first region; the silicon material is contained in the first region more than the second region; and the nonaqueous electrolyte includes at least one additive selected from the group consisting of a sulfite compound and a sulfate compound.

公开(公告)号：US20210036367A1

公开(公告)日：2021-02-04

申请号：US16966147

申请日：2019-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Yasuko Nozaki ,  Masaki Deguchi

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the electrolyte solution includes a solvent, a solute, and a carboxylic anhydride, the solvent includes a carboxylic acid ester compound, and the solute includes a sulfonyl imide compound.

公开(公告)号：US12119445B2

公开(公告)日：2024-10-15

申请号：US16966147

申请日：2019-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Yasuko Nozaki ,  Masaki Deguchi

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the electrolyte solution includes a solvent, a solute, and a carboxylic anhydride, the solvent includes a carboxylic acid ester compound, and the solute includes a sulfonyl imide compound.

公开(公告)号：US20220069307A1

公开(公告)日：2022-03-03

申请号：US17415062

申请日：2019-12-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Junichi Sakamoto ,  Masaki Deguchi

IPC: H01M4/58 ,  H01M10/0569 ,  H01M4/38

Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material capable of electrochemically absorbing and releasing lithium, the negative electrode active material includes a composite material containing a silicate phase and silicon particles dispersed in the silicate phase, and the silicate phase includes at least one of an alkali metal and an alkaline earth metal. The content of the silicon particles in the composite material is above 40 mass % and 80 mass % or less. The non-aqueous electrolyte includes a sultone compound, and the content of the sultone compound in the non-aqueous electrolyte is 2 mass % or less.

公开(公告)号：US20230344005A1

公开(公告)日：2023-10-26

申请号：US18023650

申请日：2021-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Chisaki Fujitomo ,  Tasuku Ishiguro

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M4/131

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M4/131 ,  H01M2300/0037 ,  H01M2004/028

Abstract: The non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte. The electrolyte includes an organic sulfuric acid salt represented by a formula (1): (R—O—SO3)nX1, where R is an organic group with 1 or more carbon atoms, X1 is a cation, and n is an integer of 1 to 3. The electrolyte further includes ethylene carbonate and fluoroethylene carbonate. The ethylene carbonate volume Vec and the fluoroethylene carbonate volume Vfec satisfy 0.1≤Vec/Vfec≤15.

公开(公告)号：US20230307610A1

公开(公告)日：2023-09-28

申请号：US18023638

申请日：2021-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tasuku Ishiguro ,  Chisaki Fujitomo

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133

CPC classification number: H01M4/364 ,  H01M4/625 ,  H01M4/386 ,  H01M4/587 ,  H01M4/134 ,  H01M4/133 ,  H01M2004/027

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolyte; the electrolyte includes an acid anhydride; the negative electrode includes a negative electrode mixture including a negative electrode active material and a carbon nanotube; and the negative electrode active material includes a silicon-containing material and a carbon material.

公开(公告)号：US20230170527A1

公开(公告)日：2023-06-01

申请号：US17913290

申请日：2021-03-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tasuku Ishiguro ,  Satoshi Nishitani ,  Yuanlong Zhong ,  Chisaki Fujitomo

IPC: H01M10/0567 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0569 ,  H01M2004/027 ,  H01M2300/004

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material mixture containing a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, and carbon nanotubes. The negative electrode active material includes a silicon-containing material and a carbonaceous material. The non-aqueous electrolyte includes at least one cyclic ester selected from the group consisting of a cyclic sulfate ester, a cyclic sulfite ester, and a sultone. A content of the carbon nanotubes in the negative electrode material mixture is 0.005 mass% or more and 0.05 mass% or less.

公开(公告)号：US20210050625A1

公开(公告)日：2021-02-18

申请号：US16965518

申请日：2019-01-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yasuko Nozaki ,  Satoshi Nishitani ,  Chisaki Fujitomo ,  Masaki Deguchi

IPC: H01M10/0568 ,  H01M2/16 ,  H01M4/131 ,  H01M10/058

Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte solution, wherein the electrolyte solution includes a lithium salt and carboxylic acid, and the lithium salt includes lithium bis(fluorosulfonyl)imide: LiN(SO2F)2.