公开(公告)号：US20240322217A1

公开(公告)日：2024-09-26

申请号：US18574244

申请日：2022-06-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama

IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/66 ,  H01M10/0569 ,  H01M10/0587 ,  H01M50/46 ,  H01M50/489

CPC classification number: H01M10/0525 ,  H01M4/669 ,  H01M10/0569 ,  H01M10/0587 ,  H01M50/46 ,  H01M50/489 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0028 ,  H01M2300/0034

Abstract: Disclosed is a lithium secondary battery (10) including a positive electrode (11) containing a positive electrode active material capable of absorbing and releasing lithium ions, a negative electrode (12) including a negative electrode current collector, a separator (13) disposed between the positive electrode (11) and the negative electrode (12), and a nonaqueous electrolyte having lithium ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The negative electrode current collector includes an austenitic stainless steel.

公开(公告)号：US20230207806A1

公开(公告)日：2023-06-29

申请号：US17927292

申请日：2021-05-20

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yohei Uchiyama ,  Yosuke Sato

IPC: H01M4/58 ,  H01M4/38 ,  H01M4/36 ,  H01M10/052

CPC classification number: H01M4/5825 ,  H01M4/386 ,  H01M4/364 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative electrode active material for a secondary battery includes a lithium silicate phase, and a silicon phase dispersed in the lithium silicate phase. An electron diffraction image of the negative electrode active material obtained using a transmission electron microscope has a spot image, and an average particle diameter of the negative electrode active material is 8 μm or less.

公开(公告)号：US20210320299A1

公开(公告)日：2021-10-14

申请号：US17270519

申请日：2019-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Taisuke Asano ,  Yosuke Sato

IPC: H01M4/58 ,  H01M4/38

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, and the alkali metals include at least Na and K.

公开(公告)号：US20200350591A1

公开(公告)日：2020-11-05

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 ,  H01M4/583 ,  H01M4/62 ,  H01M4/131 ,  H01M4/38 ,  H01M10/0525

Abstract: A lithium 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：US12095076B2

公开(公告)日：2024-09-17

申请号：US17311818

申请日：2019-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yosuke Sato ,  Yohei Uchiyama ,  Taisuke Asano

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/02

CPC classification number: H01M4/362 ,  H01M4/38 ,  H01M4/5825 ,  H01M2004/027

Abstract: A negative electrode active material for a secondary battery includes a silicate composite particle. The silicate composite particle contains silicate phases, silicon particles dispersed in the silicate phases, and a carbon phase. The silicate phases contain at least one selected from the group consisting of an alkali metal and an alkaline earth metal. At least parts of the carbon phase coat at least parts of surfaces of the silicon particles.

公开(公告)号：US20240136523A1

公开(公告)日：2024-04-25

申请号：US18275922

申请日：2022-01-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keita Okazaki ,  Yohei Uchiyama

IPC: H01M4/58 ,  H01M4/36 ,  H01M10/00

CPC classification number: H01M4/5825 ,  H01M4/364 ,  H01M10/00 ,  H01M2004/021

Abstract: A negative electrode active material for a secondary battery includes composite particles. The composite particles include a lithium silicate phase and a silicon phase dispersed in the lithium silicate phase, wherein the silicon phase has lined portions in the lithium silicate phase, a maximum diameter D1 and a minimum diameter D2 of the lined portions satisfy 3≤D1/D2. The composite particles include a metal Me dispersed in the lithium silicate phase, and the metal Me is at least one selected from the group consisting of Fe, Pb, Zn, Sn, Cu, Ni, Cr, Zr, and Ti.

公开(公告)号：US20210167372A1

公开(公告)日：2021-06-03

申请号：US17267979

申请日：2019-08-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiyuki Nakamori ,  Yasunobu Iwami ,  Mai Yokoi ,  Yohei Uchiyama

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

Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).

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：US20250055041A1

公开(公告)日：2025-02-13

申请号：US18851295

申请日：2023-03-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama

IPC: H01M10/0587 ,  H01M4/02 ,  H01M4/66 ,  H01M10/04 ,  H01M10/052 ,  H01M50/107 ,  H01M50/449 ,  H01M50/491

Abstract: A lithium secondary battery includes: a wound electrode group including a positive electrode, a negative electrode including a negative electrode current collector, and a separator disposed between the positive electrode and the negative electrode; a core member disposed in a hollow part of the electrode group; and a non-aqueous electrolyte having lithium ion conductivity. Lithium metal is deposited on the negative electrode when the battery is charged, and the lithium metal dissolves when the battery is discharged. The negative electrode current collector is an austenitic stainless steel foil or an oxygen-free copper foil.

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.