公开(公告)号：US20220037640A1

公开(公告)日：2022-02-03

申请号：US17296487

申请日：2019-11-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouhei Tsuzuki ,  Yuki Morikawa ,  Hirokazu Wada ,  Katsunori Yanagida

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/38 ,  H01M4/62 ,  H01M4/134 ,  H01M10/0525

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer is smaller than that of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector.

公开(公告)号：US20220029165A1

公开(公告)日：2022-01-27

申请号：US17296481

申请日：2019-11-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouhei Tsuzuki ,  Yuki Morikawa ,  Hirokazu Wada ,  Katsunori Yanagida

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/587

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and polyvinylpyrrolidone, and an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector has a higher polyvinylpyrrolidone content than an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.

公开(公告)号：US12040476B2

公开(公告)日：2024-07-16

申请号：US17296487

申请日：2019-11-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouhei Tsuzuki ,  Yuki Morikawa ,  Hirokazu Wada ,  Katsunori Yanagida

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

CPC classification number: H01M4/133 ,  H01M4/134 ,  H01M4/386 ,  H01M4/587 ,  H01M4/624 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer is smaller than that of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector.

公开(公告)号：US12027708B2

公开(公告)日：2024-07-02

申请号：US17296481

申请日：2019-11-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouhei Tsuzuki ,  Yuki Morikawa ,  Hirokazu Wada ,  Katsunori Yanagida

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587

CPC classification number: H01M4/62 ,  H01M4/133 ,  H01M4/587 ,  H01M2004/027

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and polyvinylpyrrolidone, and an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector has a higher polyvinylpyrrolidone content than an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.

公开(公告)号：US12206088B2

公开(公告)日：2025-01-21

申请号：US17296312

申请日：2019-10-31

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouhei Tsuzuki ,  Akihiko Takada ,  Yuki Morikawa ,  Hirokazu Wada ,  Katsunori Yanagida

IPC: H01M4/13 ,  H01M4/02 ,  H01M4/62

Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and a styrene-butadiene rubber, and the glass transition temperature (Tg) of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector is higher than that of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.