US 10,374,221 B2 · Scaffolding matrix with internal nanoparticles

Abstract

A battery electrode composition is provided comprising composite particles, with each composite particle comprising active material and a scaffolding matrix. The active material is provided to store and release ions during battery operation. For certain active materials of interest, the storing and releasing of the ions causes a substantial change in volume of the active material. The scaffolding matrix is provided as a porous, electrically-conductive scaffolding matrix within which the active material is disposed. In this way, the scaffolding matrix structurally supports the active material, electrically interconnects the active material, and accommodates the changes in volume of the active material.

Claims22

Dependent claims

A battery electrode composition comprising composite particles, each composite particle comprising:

active material provided to store and release ions during battery operation, whereby the storing and releasing of the ions causes a change in volume of the active material;
a porous, electrically-conductive scaffolding matrix within which the active material is interspersed, wherein the scaffolding matrix is a single-bodied monolithic particle that structurally supports the active material, electrically interconnects the active material, and accommodates the changes in volume of the active material;
and
a shell at least partially encasing the active material and the scaffolding matrix, the shell being permeable to the ions stored and released by the active material.

1 more element

A method of fabricating a battery electrode composition comprising composite particles, the method comprising:

providing an active material to store and release ions during battery operation, whereby the storing and releasing of the ions causes a change in volume of the active material;
forming a porous, electrically-conductive scaffolding matrix within which the active material is interspersed, wherein the scaffolding matrix is a single-bodied monolithic particle that structurally supports the active material, electrically interconnects the active material, and accommodates the changes in volume of the active material;
and
forming a shell at least partially encasing the active material and the scaffolding matrix, the shell being permeable to the ions stored and released by the active material.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/973,943Filed 22 Aug 2013 · us provisional application

Priority

24 Aug 2012

Published

US 2014/0057179 A127 Feb 2014

Granted

6 Aug 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 4/364
Composites: as mixtures
H01M 4/0402
Processes of manufacture in general: methods of deposition of the material
H01M 4/13
Electrodes composed of, or comprising, active material: electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators;…
H01M 4/139
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: processes of manufacture

Scaffolding matrix with internal nanoparticles

Life of this patent

Scaffolding matrix with internal nanoparticles

Life of this patent

Abstract

Claims22