公开(公告)号：US20220029151A1

公开(公告)日：2022-01-27

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 ,  H01M4/58 ,  H01M4/38

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：US20240413327A1

公开(公告)日：2024-12-12

申请号：US18690536

申请日：2022-09-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Taisuke Asano ,  Toshiki Kamidaira ,  Yosuke Sato

IPC: H01M4/58 ,  H01M4/02 ,  H01M10/0525

Abstract: The disclosed negative electrode active material for a secondary battery includes silicate composite particles each including a silicate phase, and silicon particles dispersed in the silicate phase. A peak of an oxygen K-edge energy loss near edge structure (ELNES) at an interface between the silicate phase and the silicon particles is shifted to a lower energy side by 2.0 eV to 3.0 eV relative to a peak of the oxygen K-edge energy loss near edge structure in the silicate phase.

公开(公告)号：US20240038974A1

公开(公告)日：2024-02-01

申请号：US18268813

申请日：2021-10-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiki Kamidaira ,  Taisuke Asano ,  Naoki Seki

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

CPC classification number: H01M4/382 ,  H01M4/362 ,  H01M4/485

Abstract: Composite particles for a non-aqueous electrolyte secondary battery include a lithium zirconate phase, and a silicon phase dispersed in the lithium zirconate phase. In the composite particles, a content proportion MZr of zirconium in all elements other than oxygen is, for example, 14.6 mass % or more and 54.6 mass % or less, and a content proportion MLi of lithium in all elements other than oxygen is, for example, 0.9 mass % or more and 10.4. mass % or less.

公开(公告)号：US20220263066A1

公开(公告)日：2022-08-18

申请号：US17630656

申请日：2020-07-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Taisuke Asano ,  Yohei Uchiyama ,  Yosuke Sato

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58

Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery, including a silicate phase, silicon particles dispersed in the silicate phase, and a crystal phase dispersed in the silicate phase. The silicate phase contains at least one element E1 selected from the group consisting of alkali metal elements and Group 2 elements. The crystal phase contains a rare earth element, silicon, and oxygen.

公开(公告)号：US20220190314A1

公开(公告)日：2022-06-16

申请号：US17439944

申请日：2020-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Taisuke Asano ,  Yosuke Sato ,  Masahiro Soga

IPC: H01M4/134 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/36

Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode mixture comprising a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, a negative electrode additive, and an acrylic resin. The negative electrode active material includes a silicon containing material. The Negative electrode additive includes at least silicon dioxide and a group 2 element oxide, and the group 2 element oxide includes at least one selected from the group consisting of BeO, MgO, CaO, SrO, BaO and RaO. The acrylic resin includes at least a (meth)acrylic acid salt unit. The content of the group 2 element oxide in the negative electrode additive is less than 20 mass % relative to a total amount of the negative electrode additive.

公开(公告)号：US20200020932A1

公开(公告)日：2020-01-16

申请号：US16497609

申请日：2018-02-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/38 ,  H01M4/48 ,  H01M10/0525

Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0