Electrospray deposition of a Co3O4 nanoparticles–graphene composite for a binder-free lithium ion battery electrode

Abstract

A binder-free anode was fabricated from a Co₃O₄–graphene composite by direct electrospray deposition on current collectors. The highly-interconnected mesoporous structure enables fast ion transport and accommodates the volume expansion of Co₃O₄ upon Li⁺ insertion/extraction. The incorporation of highly conductive graphene also improves the charge transport and thus the electrochemical performance.