公开(公告)号：US20240097111A1

公开(公告)日：2024-03-21

申请号：US18274575

申请日：2021-11-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shuhei Uchida ,  Yoshinori Satou

IPC: H01M4/36 ,  H01G11/50 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01G11/50 ,  H01M4/364 ,  H01M4/386 ,  H01M4/483 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021

Abstract: Active material particles include: composite particles each containing a lithium silicate phase, and a silicon phase dispersed in the lithium silicate phase; and a first coating covering at least part of surfaces of the composite particles. The first coating contains an oxide of a first element with oxygen vacancies, and a carbon material, and the first element is an element other than non-metallic elements.

公开(公告)号：US11545657B2

公开(公告)日：2023-01-03

申请号：US16820643

申请日：2020-03-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takanori Omae ,  Ryuichi Natsui ,  Yu Otsuka ,  Shuhei Uchida

IPC: H01M4/131 ,  H01M4/505 ,  H01M10/0562 ,  H01M10/052 ,  H01M4/525 ,  H01M4/36

Abstract: A cathode active material includes a lithium composite oxide having a crystal structure which belongs to a layered structure. The lithium composite oxide has a BET specific surface area of not less than 5 m2/g and not more than 10 m2/g. The lithium composite oxide has an average particle size of not less than 3 μm and not more than 30 μm. The lithium composite oxide, an average crystallite size calculated by an X-ray diffraction method is not less than 150 Å and not more than 350 Å.

公开(公告)号：US12057564B2

公开(公告)日：2024-08-06

申请号：US17152801

申请日：2021-01-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shuhei Uchida ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/131 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/74 ,  H01M2004/028

Abstract: A positive electrode active material includes a lithium composite oxide having a crystal structure belonging to the space group Fd-3m and has an integrated intensity ratio I(18°-20°)/I(43°-46°) of greater than or equal to 0.05 and less than or equal to 0.90 and an integrated intensity ratio I(63°-65°)/I(17°-19°) of greater than or equal to 0.8 and less than or equal to 2.0. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integrated intensity I(18°-20°) to an integrated intensity I(43°-46°). The integrated intensity ratio I(63°-65°)/I(17°-19°) is a ratio of an integrated intensity I(63°-65°) to an integrated intensity I(17°-19°). The integrated intensity I(A°-B°) is an integrated intensity of a maximum peak present in a range of angle of diffraction 2θ greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the positive electrode active material.

公开(公告)号：US20230318129A1

公开(公告)日：2023-10-05

申请号：US18023531

申请日：2021-08-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shuhei Uchida ,  Takahito Nakayama

IPC: H01M50/383 ,  H01M10/42

CPC classification number: H01M50/383 ,  H01M10/4235 ,  H01M2004/028

Abstract: The disclosed secondary battery is a non-aqueous electrolyte secondary battery including a positive electrode and a negative electrode. The positive electrode includes a first layer containing a positive electrode active material, and the first layer further contains a flame retardant containing a halogen atom. The first layer can contain carbon nanotubes. The first layer may include a second layer and a third layer disposed nearer to a surface of the positive electrode than the second layer, a content of the flame retardant in the third layer being higher than that in the second layer.