公开(公告)号：US20240405214A1

公开(公告)日：2024-12-05

申请号：US18694128

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Norihisa Yamamoto ,  Masahiro Soga ,  Naomichi Sato

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587

Abstract: A secondary battery according to one embodiment of the present invention is provided with: a positive electrode that has a positive electrode core and a positive electrode mixture layer formed on said core; a negative electrode that has a negative electrode core and a negative electrode mixture layer formed on said core; and an electrolyte. The positive electrode mixture layer and the negative electrode mixture layer each includes a first mixture layer and a second mixture layer arranged on the first mixture layer. The curve ratio (τ2) of the second mixture layer is less than the curve ratio (τ1) of the first mixture layer.

公开(公告)号：US20240405205A1

公开(公告)日：2024-12-05

申请号：US18694129

申请日：2022-09-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masahiro Soga ,  Norihisa Yamamoto ,  Naomichi Sato

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62

Abstract: An electrode for secondary batteries according to one example of an embodiment is provided with a core body and a mixture layer that is formed on the core body. The mixture layer includes a first mixture layer and a second mixture layer disposed on the first mixture layer, and contains graphite and silicon material as active materials, and the content of the silicon material is greater than or equal to 0.5% by mass with respect to the active material. The ratio (τ2/τ1) of the tortuosity factor (τ2) of the second mixture layer to the tortuosity factor (τ1) of the first mixture layer is less than 1.1.

公开(公告)号：US20240387810A1

公开(公告)日：2024-11-21

申请号：US18693294

申请日：2022-09-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naomichi Sato ,  Norihisa Yamamoto ,  Masahiro Soga

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/62

Abstract: This negative electrode for a rechargeable battery, according to an exemplary embodiment, comprises: a core; and a mixture layer formed on the core. The mixture layer includes: a first mixture layer; and a second mixture layer disposed on the first mixture layer. The first mixture layer and the second mixture layer have mutually different pore size distributions. In a case where a pore size corresponding to the maximum peak of the pore size distribution of the first mixture layer is defined as pore size A and a pore size corresponding to the maximum peak of the pore size distribution of the second mixture layer is defined as pore size B, the ratio of pore size A to pore size B (A/B) is greater than 0.01 and less than 1.

公开(公告)号：US20240047686A1

公开(公告)日：2024-02-08

申请号：US18269095

申请日：2021-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masaki Hasegawa ,  Norihisa Yamamoto ,  Takashi Watanabe

IPC: H01M4/62 ,  H01M4/587 ,  H01M4/48 ,  H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/625 ,  H01M4/587 ,  H01M4/483 ,  H01M4/364 ,  H01M10/0525 ,  H01M2004/021

Abstract: A negative electrode material for a secondary battery includes a negative electrode active material and a carbon nanotube, wherein the negative electrode active material includes graphite and a material including a silicon element, and the carbon nanotube has an average fiber diameter of 0.5 nm to 6 nm and an average fiber length of 1.2 μm to 8 μm. A secondary battery includes a negative electrode including the negative electrode material for a secondary battery, a positive electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte.

公开(公告)号：US20210066716A1

公开(公告)日：2021-03-04

申请号：US16963611

申请日：2019-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Norihisa Yamamoto ,  Tatsuya Akira

IPC: H01M4/58 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525

Abstract: This negative electrode active material for a secondary cell which is one aspect of the present disclosure comprises: a silicate phase that contains Li, Si, and Mx (Mx alkali metal, alkaline earth metal, and an element other than Si); silicon particles dispersed in the silicate phase; and oxide particles that contain Zr dispersed in the silicate phase. The content of each element with respect to the total of the elements other than oxygen in the silicate phase is 3 to 45 mol % for Li, 40 to 78 mol % for Si, and 1 to 40 mol % for Mx.

公开(公告)号：US12119481B2

公开(公告)日：2024-10-15

申请号：US17267231

申请日：2019-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Norihisa Yamamoto ,  Keita Okazaki

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/485 ,  H01M4/02

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/485 ,  H01M2004/027

Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, the alkali metals include at least Na and Li, and an atomic ratio: Na/Li of Na to Li is 0.1 to 7.1.

公开(公告)号：US12062788B2

公开(公告)日：2024-08-13

申请号：US16963611

申请日：2019-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Norihisa Yamamoto ,  Tatsuya Akira

IPC: H01M4/58 ,  H01M4/13 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/58 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525 ,  H01M2004/027

Abstract: This negative electrode active material for a secondary cell which is one aspect of the present disclosure comprises: a silicate phase that contains Li, Si, and Mx (Mx alkali metal, alkaline earth metal, and an element other than Si); silicon particles dispersed in the silicate phase; and oxide particles that contain Zr dispersed in the silicate phase. The content of each element with respect to the total of the elements other than oxygen in the silicate phase is 3 to 45 mol % for Li, 40 to 78 mol % for Si, and 1 to 40 mol % for Mx.

公开(公告)号：US11984604B2

公开(公告)日：2024-05-14

申请号：US16767774

申请日：2018-10-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Taisuke Yamamoto ,  Tatsuya Akira ,  Norihisa Yamamoto ,  Hiroshi Minami

IPC: H01M4/66 ,  H01M4/02 ,  H01M4/131 ,  H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/661 ,  H01M4/131 ,  H01M4/386 ,  H01M4/583 ,  H01M4/622 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028

Abstract: A lithium ion battery including a negative electrode having a negative electrode active material layer that contains lithium silicate particles and a binder. The lithium silicate particles include composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, wherein a carbon material is present inside the composite particles, and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%. The binder includes at least a first resin, wherein the first resin is at least cue selected from the group consisting of polyacrylic acid, a polyacrylic acid salt, and their derivatives. The first resin is contained in an amount of 2 mass % or less in the negative electrode active material layer.

公开(公告)号：US20210057727A1

公开(公告)日：2021-02-25

申请号：US16963585

申请日：2019-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuya Akira ,  Yohei Uchiyama ,  Norihisa Yamamoto

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/48

Abstract: A negative electrode active substance for a secondary battery, which is one embodiment of the present disclosure, comprises: a silicate phase which contains Li, Si and Mx (Mx is an alkali metal, an alkaline earth metal or an element other than Si); silicon particles dispersed in the silicate phase; and metal particles which are dispersed in the silicate phase and are constituted mainly from one or more metals selected from among Fe, Cr, Ni, Mn, Cu, Mo, Zn and Al or an alloy of these. In the silicate phase, the content of the following elements, relative to the total amount of elements other than oxygen, is: 3-45 mol % of Li; 40-78 mol % of Si; and 1-40 mol % of Mx.

公开(公告)号：US20200321611A1

公开(公告)日：2020-10-08

申请号：US16957182

申请日：2018-12-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Norihisa Yamamoto ,  Tatsuya Akira

IPC: H01M4/36 ,  H01M4/485 ,  H01M10/0525

Abstract: A negative electrode active substance particle according to one embodiment of the present invention, comprises a mother particle that has: a silicate phase that includes Na, Si, and at least one element selected from M, M1, M2, M3 and M4 (M is an alkali earth metal, and M1, M2, M3 and M4 are elements other than alkali metals, alkali earth metals or Si); and silicon particles dispersed in the silicate phase. The contents of the elements in the silicate phase are: 9-52 mol % of Na; 3-50 mol % of M, M1, M2, M3 and M4; and at least 25 mol % of Si.