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).

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.

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.

A method of manufacturing a free-standing electrode film includes preparing a mixture including an electrode active material, a binder, and an additive solution or conductive paste, the additive solution or conductive paste being in an amount less than 5% by weight of the mixture and including a polymer additive and a liquid carrier, as well as a conductive material in the case of a conductive paste. The mixture may have total solid contents greater than 95% by weight. Preparing the mixture may include mixing the additive solution or conductive paste with the electrode active material to lubricate the electrode active material and subsequently adding and mixing in the binder. The method may further include subjecting the mixture to a shear force and, after the mixture has been subjected to the shear force, pressing the mixture into a free-standing film.

A composite for use the manufacture of an electrode, the composition comprising a spontaneously formed segregated network of nanosheets of conducting materials, or a combination thereof, and a particulate active material, in which no additional polymeric binder or conductive-additive are required.

An aspect of the present invention is an energy storage device including: an electrode assembly obtained by winding a band-shaped positive electrode including a positive active material layer, a band-shaped negative electrode including a negative active material layer, and a band-shaped separator in the longitudinal direction; an electrolyte solution; and a case that houses the electrode assembly and the electrolyte solution, where at least one of the positive active material layer and the negative active material layer contains a hollow active material particle, the winding axis of the electrode assembly is located parallel to the horizontal direction, at least a central part of the electrode assembly is pressed with the case pressed, an excess electrolyte solution that is a part of the electrolyte solution is present between the electrode assembly and the case, the lower end of the electrode assembly has contact with the excess electrolyte solution, and the relationship between the height H from the liquid level of the excess electrolyte solution to the upper end of the electrode assembly and the width We of the positive active material layer satisfies the following formula 1:

0.8H≤Wc≤2.0H  1

A lithium-ion battery may include a cathode, an anode, and a polymer electrolyte. The anode may include a current collector. The current collector may include a metal oxide layer provided in a first pattern overlaying a metal layer. The anode may also include a patterned lithium storage structure. The patterned lithium storage structure may include a continuous porous lithium storage layer overlaying at least a portion of the first pattern of metal oxide. These and other lithium-ion batteries are described.

A lithium-ion battery may include a cathode, an anode, and a polymer electrolyte. The anode may include a current collector. The current collector may include a metal oxide layer provided in a first pattern overlaying a metal layer. The anode may also include a patterned lithium storage structure. The patterned lithium storage structure may include a continuous porous lithium storage layer overlaying at least a portion of the first pattern of metal oxide. These and other lithium-ion batteries are described.

An integrated flexible self-charging power supply for energy harvesting in an agricultural environment and a preparation method thereof are provided, wherein the integrated flexible self-charging power supply for the energy harvesting in the agricultural environment includes polydimethylsiloxane (PDMS) and a graphene electrode entirely encapsulated in the PDMS, where the graphene electrode includes a power generation portion and an interdigital portion; the power generation portion and the interdigital portion are integrally encapsulated in the PDMS; the interdigital portion is covered with a solid electrolyte; two ends of the interdigital portion of the graphene electrode are led out by wires to serve as two output ends of the power supply.

The present invention relates to a three-dimensional structure electrode, a method for manufacturing same, and an electrochemical element including the electrode. The present invention is characterized by comprising: (a) an upper conductive layer and a lower conductive layer which have a structure constituting an assembly within which a conductive material and a porous nonwoven fabric including a plurality of polymeric fibers are three-dimensionally connected in an irregular and continuous manner, thereby forming a mutually connected porous structure; and (b) an active material layer forming the same assembly structure as the conductive layers and forming a three-dimensionally filled structure in which electrode active material particles are uniformly filled inside the mutually connected porous structure formed in the assembly structure, wherein the active material layer is formed between the upper conductive layer and the lower conductive layer.