公开(公告)号：US20190214642A1

公开(公告)日：2019-07-11

申请号：US16311988

申请日：2017-07-03

Applicant: KRATOS LLC

Inventor： Timothy D. Newbound ,  Reza Kavian ,  Jeff A. Norris

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/587 ,  H01M4/04

Abstract: A method of producing a negative electrode, including comminuting Li-Group IVA alloy particles in a solvent to a desired particle size distribution range, exposing surfaces of the Li-Group IVA alloy particles to at least one surface modifier present during the comminution process, the at least one surface modifier forming at least one continuous coating on at least one of the exposed surfaces of the Li-Group IVA alloy particles, removing the solvent, and adding the surface-modified Li-Group IVA alloy particles to a negative electrode material by a coating process.

公开(公告)号：US20200259170A1

公开(公告)日：2020-08-13

申请号：US16497601

申请日：2018-03-30

Applicant: KRATOS LLC

Inventor： Timothy D. Newbound ,  Richard Owen Crowther ,  Reza Kavian ,  Bruce Andrew Kraay ,  Jeff A. Norris

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/1395 ,  H01M4/66 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525

Abstract: Provided are methods of producing a negative electrode including comminuting Li-Group IVA alloy particles in a solvent to a desired particle size distribution range, exposing surfaces of the Li-Group IVA alloy particles to a monomer or polymer surface modifier present during the comminution process, the surface modifier forming a continuous coating on an exposed surface of the Li-Group IVA alloy particles, removing the solvent, and adding the surface-modified Li-Group IVA alloy particles to a negative electrode material by a coating process.

公开(公告)号：US11637280B2

公开(公告)日：2023-04-25

申请号：US16497601

申请日：2018-03-30

Applicant: KRATOS LLC

Inventor： Timothy D. Newbound ,  Richard Owen Crowther ,  Reza Kavian ,  Bruce Andrew Kraay ,  Jeff A. Norris

IPC: H01M4/131 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided are methods of producing a negative electrode including comminuting Li-Group IVA alloy particles in a solvent to a desired particle size distribution range, exposing surfaces of the Li-Group IVA alloy particles to a monomer or polymer surface modifier present during the comminution process, the surface modifier forming a continuous coating on an exposed surface of the Li-Group IVA alloy particles, removing the solvent, and adding the surface-modified Li-Group IVA alloy particles to a negative electrode material by a coating process.

公开(公告)号：US11522178B2

公开(公告)日：2022-12-06

申请号：US16311988

申请日：2017-07-03

Applicant: KRATOS LLC

Inventor： Timothy D. Newbound ,  Reza Kavian ,  Jeff A. Norris

IPC: H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/02

Abstract: A method of producing a negative electrode, including comminuting Li-Group IVA alloy particles in a solvent to a desired particle size distribution range, exposing surfaces of the Li-Group IVA alloy particles to at least one surface modifier present during the comminution process, the at least one surface modifier forming at least one continuous coating on at least one of the exposed surfaces of the Li-Group IVA alloy particles, removing the solvent, and adding the surface-modified Li-Group IVA alloy particles to a negative electrode material by a coating process.

公开(公告)号：US20200044240A1

公开(公告)日：2020-02-06

申请号：US16338576

申请日：2017-10-09

Applicant: KRATOS LLC

Inventor： Timothy D. Newbound ,  Reza Kavian ,  Jeff A. Norris ,  Richard Owen Crowther

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/62

Abstract: The present invention provides micron or submicron particles (NPs) that are comprised of a variety of materials, including Group IVA elements such as silicon (Si) that are known to have a high electrochemical capacity in Li-ion secondary batteries. The micron or sub-micron particles of the invention are provided with a surface layer, or surface modification, that imparts additional functionality to the particle. Surface modification prevents the formation of a dielectric oxide layer on the primary Group IV A particles, allowing elements of the surface modifier to covalently bond directly to the Group IV A elements, accommodates volumetric expansion to help mitigate ingress of electrolyte solvents from penetrating the surface modifier, mitigates disruption of SEI layers formed during electrochemical cycling and provides favorable surface properties to allow the formation of strong bonding to binders and other materials in the electrode composite. The NPs can be combined with graphite particles to create a composite graphite particle that can be used for battery anodes.