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
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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.
Claims42
A plurality of discrete particles, wherein each particle comprises silicon and includes a particle core and a plurality of silicon-comprising elongate structures, 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 capable of being lithiated and delithiated.
A plurality of discrete particles, wherein each particle comprises silicon and includes a particle core and a plurality of silicon-comprising elongate structures extending outwardly therefrom from a first end to a second end, wherein the plurality of elongate structures are attached to the core at the first end of the elongate structure and unattached to the core at the second end, and wherein the silicon-comprising elongate structures are capable of being lithiated and delithiated and are capable of withstanding the volumetric expansion and contraction associated with lithium insertion and extraction without breaking.
Dependencies are inferred from the claim text.