49 results about "Carbon nanowalls" patented technology

A negative electrode (10) for a lithium secondary battery, including a negative electrode collector (20), and a negative electrode active substance layer (30) that is supported on the negative electrode collector (20) and includes carbon nanowalls (32) which are formed on the negative electrode collector (20), and a negative electrode active substance (36) which is supported on the carbon nanowalls (32).

A method for growing carbon nanowalls on a base material is disclosed. The method comprises mixing a predetermined amount of a hydrocarbon gas with a predetermined amount of at least one non hydrocarbon gas; placing said base material in a reaction chamber having a first portion and a second portion, first portion is extended from a first end of reaction chamber to first end of base material; creating a radical in reaction chamber which comprises a hydrocarbon radical and a non hydrocarbon radical; applying the radical to the base material; and growing carbon nanowalls on said base material based on said hydrocarbon radical.

The invention provides a method of controlling the structure of carbon nanowall (CNW) in which the interwall spacing of carbon nanowall (CNW) is varied so as to control the surface area thereof or control the crystallinity thereof, thereby enhancing the corrosion resistance at high potential; and a highly crystalline carbon nanowall (CNW) and carbon nanowall (CNW) of large surface area with controlled structure. There are provided (1) carbon nanowall characterized by having a wall surface area of 50 cm / cm-substrate mum or greater, (2) carbon nanowall characterized by having a crystallinity such that the D-band half value width of Raman spectrum measured with an irradiation laser wavelength of 514.5 nm is 85 cm or less; and (3) carbon nanowall characterized by having not only a wall surface area of 50 cm / cm-substrate mum or greater but also a crystallinity such that the D-band half value width of Raman spectrum measured with an irradiation laser wavelength of 514.5 nm is 85 cm or less.

A positive electrode (10) for a lithium secondary battery, including a positive electrode collector (20), and a positive electrode active substance layer (30) that is supported on the positive electrode collector (20) and includes carbon nanowalls (32) which are formed on the positive electrode collector (20), and a positive electrode active substance (36) which is supported on the carbon nanowalls (32).

A positive electrode (10) for a lithium secondary battery, including a positive electrode collector (20), and a positive electrode active substance layer (30) that is supported on the positive electrode collector (20) and includes carbon nanowalls (32) which are formed on the positive electrode collector (20), and a positive electrode active substance (36) which is supported on the carbon nanowalls (32).

Releasability of a mold and a resin layer during nanoimprinting is improved, thereby improving the durability of the mold. A nanoimprint mold for resin molding comprising a carbon nanowall layer provided on the surface thereof, a method of forming a nanopattern using the mold, and a resin-molded product obtained by the method.

The present invention relates to a graphene nanoribbon preparation method, which comprises steps as follows: etching a metal substrate in an acid solution; then heating the etched metal substrate to between 600 and 900 DEG C under anaerobic conditions, exposing the metal substrate to ultraviolet radiation under flux of a carbon-containing gas and a protective gas; after the reaction, obtaining carbon nanowalls on the surface of the metal substrate; mixing the carbon nanowalls and a chloride intercalating agent at a mass ratio of 1 : (0.8 to 1.2), heating to between 460 and 550 DEG C, and maintaining the temperature and reacting for 2 hours to 6 hours to obtain the chloride intercalated carbon nanowalls; and mixing the chloride intercalated carbon nanowalls and an ionic liquid at a volume / mass ratio of 1 g: 10 ml to 100 ml, and processing the mixture in an alternating electric field with intensity of 50 V / m to 5000 V / m for 10 minutes to 30 minutes to obtain a reaction solution, which is filtered to obtain graphene nanoribbons. The graphene nanoribbons prepared by the method mentioned above have high electrical conductivity.

A method for manufacturing a catalyst layer for a fuel cell support for a catalyst layer comprises the steps of vapor-growing a carbonaceous porous material having a nano-size structure, such as carbon nanowalls (CNWs), and supporting and dispersing a catalyst component and / or an electrolyte component on the support for a catalyst layer. The method simplifies the process for manufacturing an electrode layer for fuel cells and improves the dispersibility of the catalyst component and the electrolyte, whereby the generation efficiency of a fuel cell can be improved.

A novel composite electrode material and a method for manufacturing the same, a composite electrode containing said composite electrode material, and a Li-based battery comprising said composite electrode are disclosed. Herein, the composite electrode material of the present invention comprises: a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, and compounds thereof; and a graphene nanowall or a graphene-like carbon nanowall; wherein the graphene nanowall or the graphene-like carbon nanowall grows on a surface of the core.

Provided is a negative electrode having a new structure for realizing a lithium secondary battery having increased charging / discharging capacities and a battery capacity that is reduced less due to repeated charging / discharging. The negative electrode for a lithium secondary battery includes a current collector substrate; a carbon nanochips layer including graphene sheets grown to incline in irregular directions independently from the current collector substrate; and a silicon thin film layer on the carbon nanochips layer, in which gaps among the carbon nanochips are formed between the silicon thin film layer and the current collector substrate. The Raman spectrum of graphite forming the carbon nanochips layer has a g / d ratio of 0.30 to 0.80, both inclusive, and the crystallinity level of the graphite is lower than that of graphite forming carbon nanowalls. The carbon nanochips layer can be formed by a plasma CVD method using a gaseous mixture of methane and hydrogen, for example.

The present invention relates to an oxygen reduction catalyst, an oxygen reduction electrode, and a fuel cell that have nitrogen-doped carbon nanowalls. The present invention can provide, at a low cost, an oxygen reduction catalyst, an oxygen reduction electrode, and a fuel cell.