公开(公告)号：US10950852B2

公开(公告)日：2021-03-16

申请号：US16497629

申请日：2018-02-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuro Hayashida ,  Daisuke Katou

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

Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes: a lithium silicate phase including lithium silicate particles; silicon particles dispersed in the lithium silicate phase; and a low-melting point inorganic oxide that has a lower melting point than lithium silicate forming the lithium silicate particles, and that is solid at room temperature. The lithium silicate particles and the silicon particles form a particle agglomerate, and the low-melting point inorganic oxide is filled in at least a portion of voids included in the particle agglomerate.

公开(公告)号：US10424785B2

公开(公告)日：2019-09-24

申请号：US15623399

申请日：2017-06-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke Katou ,  Kenichi Hotehama ,  Junko Matsushita

IPC: H01M4/02 ,  H01M4/36 ,  H01M4/04 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/1393 ,  H01M4/1395

Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes a plurality of composite particles. Each of the plurality of composite particles includes an inorganic particle, one or more covering layers, each of which is in contact with a surface of the inorganic particle, and a carbonaceous material layer that covers the inorganic particle and has voids. The carbonaceous material layer includes a first region having a porosity of 4.3% or more and 10.0% or less, the first region being a region extending from the surface of the inorganic particle to the surface of an imaginary sphere that is centered at the center of the inorganic particle and has a radius of 3r, where r is a radius of the inorganic particle. Each of the voids is separated by one of the one or more covering layers from the surface of the inorganic particle.