COMPOSITE PARTICLE

摘要

A composite particle for inclusion in a composite material of the sort used in electrochemical cells, metal ion batteries such as lithium-ion batteries, lithium air batteries, flow cell batteries, other energy storage devices such as fuel cells, thermal batteries, photovoltaic devices such as solar cells, filters and the like is provided. The composite particle comprises a particle core and a polymeric coating applied thereto. The present invention provides a composite material including a composite particle, methods of manufacturing both composite particles and composite materials and devices including such materials and particles.

主权项

1. An electrode for a lithium ion battery, the electrode comprising a current collector and a composite material applied to the surface of the current collector, wherein the composite material comprises an electroactive composite particle comprising:
a. a first particle component selected from the group comprising silicon, tin, germanium, gallium, lead, zinc, aluminium and bismuth and alloys and oxides thereof; and b. a first polymeric coating characterised in that the first polymeric coating adheres to the surface of the first particle component, is insoluble in N-methyl pyrrolidone (NMP), comprises one or more functional groups selected from a carboxylic acid and sulphonic acid functional group and covers at least 70% of the surface area of the first particle component.