High‐Performance Solid‐State Supercapacitors and Microsupercapacitors Derived from Printable Graphene Inks

Solid-state supercapacitors and microsupercapacitors comprising printed graphene electrodies and related method of fabricating a graphene capacitor, said method comprising providing a graphene ink composition comprising graphene and an ethyl cellulose, said composition not prepared from graphene oxide, depositing said graphene ink composition on a substrate, annealing said graphene ink composition to decompose said ethyl cellulose and provide an electrode component comprising graphene, and coupling electrolyte and metallic lead components to said electrode component.