公开(公告)号：US20220158181A1

公开(公告)日：2022-05-19

申请号：US17442154

申请日：2020-03-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yukiho Okuno ,  Takahiro Fukuoka ,  Tasuku Ishiguro ,  Masahiro Soga

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/587 ,  H01M4/134

Abstract: A negative electrode material mixture with a negative electrode active material including a Si-containing material and a carbon material; and a carbon nanotube. The Si-containing material includes, a first composite material in which Si particles are dispersed in a lithium silicate phase and/or a carbon phase, and a second composite material in which Si particles are dispersed in a SiO2 phase, at least the first composite material. A mass ratio X of the first composite material to a total of the first and second composite materials, and a mass ratio Y of the total of the first second composite materials to a total of the first composite material, the second composite material, and the carbon material satisfy a relational expression (1): 100Y−32.2X5+65.479X4−55.832X3+18.116X2−6.9275X−3.5356

公开(公告)号：US20240136526A1

公开(公告)日：2024-04-25

申请号：US18277185

申请日：2021-12-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Komi ,  Yukiho Okuno ,  Mitsuru Iwai ,  Shuji Tsutsumi

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/62 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode slurry for a lithium ion secondary battery, according to the present disclosure, is characterized by comprising a negative electrode active material, a thickener, a preservative component, and a solvent, the thickener comprising carboxymethyl-cellulose or a salt thereof, the solvent comprising water, and the preservative component comprising a compound having a tropone skeleton.

公开(公告)号：US20240405201A1

公开(公告)日：2024-12-05

申请号：US18695547

申请日：2022-09-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yosuke Sato ,  Keita Okazaki ,  Yukiho Okuno

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/38 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525

Abstract: A secondary battery disclosed herein includes a positive electrode, and a negative electrode containing a negative electrode active material. The negative electrode active material contains a carbon material and a silicon-containing material. The average particle diameter of the silicon-containing material is smaller than the average particle diameter of the carbon material. The average circularity of the silicon-containing material is smaller than the average circularity of the carbon material.

公开(公告)号：US20240396019A1

公开(公告)日：2024-11-28

申请号：US18695544

申请日：2022-09-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yosuke Sato ,  Keita Okazaki ,  Yukiho Okuno

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587

Abstract: A secondary battery disclosed herein includes a positive electrode, and a negative electrode containing a negative electrode active material. The negative electrode active material contains a carbon material and a silicon-containing material. The silicon-containing material includes a first silicon-containing material and a second silicon-containing material. The average particle diameter of the first silicon-containing material and the average particle diameter of the second silicon-containing material are each smaller than the average particle diameter of the carbon material. The average circularity Zc of the carbon material, the average circularity Zs1 of the first silicon-containing material, and the average circularity Zs2 of the second silicon-containing material satisfy Zs1

公开(公告)号：US20240145718A1

公开(公告)日：2024-05-02

申请号：US18276343

申请日：2021-12-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Komi ,  Yukiho Okuno ,  Mitsuru Iwai ,  Shuji Tsutsumi

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/622 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode slurry for a lithium ion secondary battery, according to an aspect of the present disclosure, comprises a negative electrode active material, a thickener, a preservative component, and a solvent, the thickener comprising carboxymethyl-cellulose or a salt thereof, the solvent comprising water, and the preservative component comprising a cyclic hydroxamic acid ethanolamine salt.