The present invention relates in part to a method of fabricating graphene structures from graphene oxide by reducing the graphene oxide on a patterned substrate. The invention also relates in part to graphene structures produced using said method and electrodes and capacitors comprising said graphene structures.

A composite with high energy storage capacity for use in energy storage devices includes graphene and mesoporous graphitic carbon nitride (mc@g-C.sub.3N.sub.4). The graphitic carbon nitride is coated on mesoporous carbon (mc@g-C3N4) at a concentration ranging from 3% to 33%. The graphitic carbon nitride is obtained from condensation of mesoporous carbon and urea or a precursor thereof. Electrodes may be prepared from the composite. High energy high power storage devices such as the Electric Double Layer Capacitor (EDLC) may be fabricated with these electrodes.

A supercapacitor having multiple graphene layers that are separated by separator layers. The graphene layers and the separator layers are enclosed within a housing that is filled with electrolyte

A supercapacitor having multiple graphene layers that are separated by separator layers. The graphene layers and the separator layers are enclosed within a housing that is filled with electrolyte

This disclosure provides a battery comprising a cathode and an anode positioned opposite the cathode. A hybrid artificial solid-electrolyte interphase (A-SEI) layer is deposited on the anode and includes a plurality of active components. A blended material is interwoven throughout the plurality of active components and configured to inhibit growth of Lithium (Li) dendritic structures from the anode to the cathode. The blended material includes a combination of crystalline sp.sup.2-bound carbon domains of graphene sheets and a plurality of flexible wrinkle areas positioned at joinder points of two of more of the crystalline sp.sup.2-bound carbon domains of graphene sheets and a polymeric matrix configured to bind the plurality of active components and the blended material together. An electrolyte is in contact with the hybrid A-SEI and the cathode and a separator is positioned between the anode and the cathode. The blended material includes curable carboxylate salts of metals.

This disclosure provides a battery comprising a cathode and an anode positioned opposite the cathode. A hybrid artificial solid-electrolyte interphase (A-SEI) layer is deposited on the anode and includes a plurality of active components. A blended material is interwoven throughout the plurality of active components and configured to inhibit growth of Lithium (Li) dendritic structures from the anode to the cathode. The blended material includes a combination of crystalline sp.sup.2-bound carbon domains of graphene sheets and a plurality of flexible wrinkle areas positioned at joinder points of two of more of the crystalline sp.sup.2-bound carbon domains of graphene sheets and a polymeric matrix configured to bind the plurality of active components and the blended material together. An electrolyte is in contact with the hybrid A-SEI and the cathode and a separator is positioned between the anode and the cathode. The blended material includes curable carboxylate salts of metals.

An energy storage device according to one aspect of the present invention is an energy storage device including a negative electrode having a negative electrode substrate and a negative active material layer stacked on the negative electrode substrate directly or via another layer, and a nonaqueous electrolyte solution, in which the negative active material layer contains graphite and a solvent-based binder, and the negative active material layer is not subjected to pressing.

An electrode assembly for an ultracapacitor is provided. The electrode assembly contains a first electrode comprising a first current collector electrically coupled to a first carbonaceous coating, a second electrode comprising a second current collector electrically coupled to a second carbonaceous coating, and a separator positioned between the first electrode and the second electrode. At least a portion of the first current collector projects beyond the first longitudinal edge to define a first projecting portion, wherein the offset ratio of the first projecting portion is from about 0.02 to about 0.3.

It is a CNT device (1) (carbon-metal structure) equipped with a carbon nanotube layer (2) (CNT layer 2; same hereafter) on a metal pedestal (4). The metal pedestal (4) is brazed to the CNT layer (2) with a brazing material layer (3) interposed therebetween. When manufacturing the CNT device (1), firstly, the CNT layer (2) is formed on a heat-resistant textured substrate (6). Next, the metal pedestal (4) is brazed to the CNT layer (2) that is on the heat-resistant textured substrate (6) with the brazing material layer (3) interposed therebetween. Then, the metal pedestal (4) (and the CNT layer 2) is peeled off the heat-resistant textured substrate (6) to transfer the CNT layer (2) from the heat-resistant textured substrate (6) to the metal pedestal (4).

Ultra-thin lithium ion capacitors with ultra-high power performance are provided. Ultra-thin electrodes and ultra-thin lithium films can be used for the ultra-thin lithium ion capacitor. A lithium ion capacitor can include a first positive electrode and a second positive electrode, a negative electrode disposed between the first positive electrode and the second positive electrode, a first lithium film disposed between the first positive electrode and the negative electrode, and a second lithium film disposed between the second positive electrode and the negative electrode. Each of the first and second lithium films can include an electrolyte. In addition, at least one separator can be provided between the first positive electrode and the first lithium film, and at least one separator can be provided between the second positive electrode and the second lithium film.