A meta-material is disclosed that includes a first layer composed of graphene, and one or more additional layers, each composed of glassy carbon or graphene. A method of producing an engineered material includes depositing a graphene precursor on a substrate, pyrolyzing the graphene precursor to allow the formation of graphene, depositing a glassy carbon precursor the graphene, pyrolyzing to allow the formation of glassy carbon from the glassy carbon precursor, depositing a graphene precursor on the glassy carbon, and pyrolyzing the graphene precursor to allow the formation of graphene.

The present invention provides an on-chip all-solid-state supercapacitor, which includes a first electrode and a second electrode, and both the first electrode and the second electrode include a substrate, a laminated structure, a conductive thin film layer and a solid electrolyte. The laminated structure is disposed on a surface of the substrate and is provided with at least one deep trench structure; an inner surface of the deep trench structure is provided with a sacrificial layer trench, which increases the electrode area of the on-chip all-solid-state supercapacitor, and further increases the capacitance density and energy density; the conductive thin film layer covers the inner surface of the deep trench structure, an inner surface of the sacrificial layer trench, the surface of the substrate exposed in the deep trench structure and a surface of the laminated structure facing away from the substrate; the solid electrolyte is filled inside the sacrificial layer trench and the deep trench structure covered by the conductive thin film layer; the solid electrolyte also covers a surface of the conductive thin film layer facing away from the substrate, and the solid electrolyte of the first electrode and the solid electrolyte of the second electrode are bonded together. The present invention also provides a preparation method of an on-chip all-solid-state supercapacitor.

The present invention provides an on-chip all-solid-state supercapacitor, which includes a first electrode and a second electrode, and both the first electrode and the second electrode include a substrate, a laminated structure, a conductive thin film layer and a solid electrolyte. The laminated structure is disposed on a surface of the substrate and is provided with at least one deep trench structure; an inner surface of the deep trench structure is provided with a sacrificial layer trench, which increases the electrode area of the on-chip all-solid-state supercapacitor, and further increases the capacitance density and energy density; the conductive thin film layer covers the inner surface of the deep trench structure, an inner surface of the sacrificial layer trench, the surface of the substrate exposed in the deep trench structure and a surface of the laminated structure facing away from the substrate; the solid electrolyte is filled inside the sacrificial layer trench and the deep trench structure covered by the conductive thin film layer; the solid electrolyte also covers a surface of the conductive thin film layer facing away from the substrate, and the solid electrolyte of the first electrode and the solid electrolyte of the second electrode are bonded together. The present invention also provides a preparation method of an on-chip all-solid-state supercapacitor.

A method of preparing an electrochemical electrode which is partially or totally covered with a film that is obtained by spreading an aqueous solution comprising a water-soluble binder over the electrode and subsequently drying same. The production cost of the electrodes thus obtained is reduced and the surface porosity thereof is associated with desirable resistance values.

A method of preparing an electrochemical electrode which is partially or totally covered with a film that is obtained by spreading an aqueous solution comprising a water-soluble binder over the electrode and subsequently drying same. The production cost of the electrodes thus obtained is reduced and the surface porosity thereof is associated with desirable resistance values.

A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm.sup.2 and less than or equal to 10 m.sup.2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.

A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm.sup.2 and less than or equal to 10 m.sup.2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.

A process is provided comprising submerging a substrate in an electrochemical deposit bath having at least a metal salt and saccharin. In embodiments, the film is further treated with anodization, and in other cases chemical vapor deposition. Films are also provided formed by the disclosed processes. The films are nanoporous on at least a portion of a surface of the films. Also disclosed are electronic devices having the films disclosed, including lithium-ion batteries, storage devices, supercapacitors, electrodes, semiconductors, fuel cells, and/or combinations thereof.

A process is provided comprising submerging a substrate in an electrochemical deposit bath having at least a metal salt and saccharin. In embodiments, the film is further treated with anodization, and in other cases chemical vapor deposition. Films are also provided formed by the disclosed processes. The films are nanoporous on at least a portion of a surface of the films. Also disclosed are electronic devices having the films disclosed, including lithium-ion batteries, storage devices, supercapacitors, electrodes, semiconductors, fuel cells, and/or combinations thereof.

Disclosed herein is a composite material that is formed from a polymer, acetylated collagen and graphene, which can be used as a super-capacitor material. Also disclosed herein are methods of making said composite material and its intermediates, as well as a supercapacitor made using said material.