Method of fabricating structured particles composed of silicon or a silicon-based material and their use in lithium rechargeable batteries
AssigneeNexeon Limited
InventorsMino Green, Feng-Ming Liu
Life of this patent
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Abstract
Pillared particles of silicon or silicon-comprising material and a method of fabricating the same are disclosed. These particles may be used to create both a composite anode structure with a polymer binder, a conductive additive and a metal foil current collector, and an electrode structure. The structure of the particles overcomes the problems of charge/discharge capacity loss.
Claims21
A particle comprising a particle core and a plurality of elongate structures coating one or more surfaces of the particle, each extending outwardly from the particle core from a first end to a second end, wherein each of the plurality of elongate structures is attached to the core at the first end of the elongate structure and the second end of the elongate structure is an unattached free end, and wherein the elongate structures are formed from silicon.
A porous composite structure for an electrode comprising a plurality of discrete particles, each discrete particle comprising a particle core and a plurality of elongate structures coating one or more surfaces of the particle, each extending outwardly from the particle core from a first end to a second end, wherein each of the plurality of elongate structures is attached to the core at the first end of the elongate structure, and wherein the elongate structures are formed from silicon;
- and a binder binding the particles into the composite structure.
A method of fabricating a plurality of discrete particles, each particle comprising a particle core and a plurality of elongate structures coating one or more surfaces of the particle, each extending outwardly from the particle core from a first end to a second end, wherein each of the plurality of elongate structures is attached to the core at the first end of the elongate structure and the second end of the elongate structure is an unattached free end, and wherein the elongate structures are formed from silicon, the method comprising providing a plurality of silicon particles, and etching the silicon particle to form the elongate structures.
Dependencies are inferred from the claim text.