The present invention relates to an aerogel based on doped graphene, a method for producing said aerogel and the use of said aerogel, for example, as an electrode or a catalyst. Furthermore, the present invention relates to electrodes, all solid-state supercapacitors (ASSS) or catalysts based on said aerogel.The present invention also relates to doped graphene, which can be obtained as an intermediate in the production of the aerogel based on doped graphene using graphene oxide as starting material.

Aerogel based on doped graphene

The invention relates to a preparation method of a graphene film In the invention, an electrochemical method is used for preparing a graphene film on the surface of a conductive substrate The graphene film prepared by the method has the advantages of controllable thickness, controllable size, uniformity, continuity and crystallinity The graphene film can be widely used in the fields of sensors, transistors, transparent electrodes, capacitors, catalysts, composite materials and the like

Preparation method of graphene film

The invention discloses a material adopting a thin graphene and metal powder composite structure, a preparation method and an application thereof The material adopting the composite structure comprises metal powder bridged by and coated with thin graphene The preparation technology of the material comprises the steps as follows: mixing transition metal powder or reduced transition metal powder with the thin graphene, and growing the thin graphene on the surface of the transition metal powder through CVD (chemical vapor deposition) and coating the surface of the transition metal powder with the thin graphene, so as to obtain the metal powder bridged by and coated with the thin graphene; or growing the thin graphene on the surface of the transition metal powder through the CVD, and then compositing the metal powder with the thin graphene to obtain a target product The invention has the advantages that the technology is simple; the oxidation resistance and the corrosion prevention of the metal powder can be enhanced, meanwhile, the metal powder has good heat conduction, antistatic and electromagnetic shielding properties, the service life of the metal powder can be prolonged, and the cost can be reduced; and besides, the material has a wide application prospect in antistatic performance, thermal management, heat conduction and radiation, electromagnetic shielding, catalysts, sintering activators, electro-conduction slurry, batteries, cemented carbide and the like

Material adopting thin graphene and metal powder composite structure, preparation method and application thereof

Film containing graphene and/or graphene oxide, and preparation method thereof

Transparent conductive film and preparation method of transparent conductive film

The invention belongs to the fields of material synthesis and energy technology, and especially relates to a graphene/metal oxide composite cathode material for lithium ion batteries and a preparation method thereof. Grapheme is dispersed into various metal oxide precursor salt solutions; a graphene/metal oxide compound is obtained directly by a hydrothermal method, or an graphene/metal oxide compound is obtained by a liquid in-situ polymerization method or a coprecipitation process; and the graphene/metal oxide compound is obtained by heat treatment or hydrothermal treatment. In the invention, the novel three-dimensional composite cathode material of graphene-coated metal oxide or graphene-anchored metal oxide is prepared by carrying metal oxide particles with graphene as a carrier. The obtained composite material can be used as a lithium ion battery cathode, which has a high specific capacity, excellent cycle stability and rate capability, and is expected to be used as a lithium ion battery cathode material with a high energy density and a high power density.

Graphene/metal oxide composite cathode material for lithium ion battery and preparation

The invention relates to a method for preparing a graphene-based flexible super capacitor and an electrode material The method comprises the following steps of: (1) filtering graphene aqueous dispersion with different concentrations through a filter film to form a film-shaped product, drying the filter film and the film-shaped product and stripping the film-shaped product from the filter film so as to obtain a graphene thin film; (2) taking the graphene thin film as an electrode material, taking sulfuric acid and aqueous solution of conducting polymer or transition metal oxide as electrolyte solution respectively, and depositing the conducting polymer or the transition metal oxide on the surface of the graphene thin film by adopting constant potential electrochemical deposition so as to prepare a grapheme-based composite thin film; and (3) taking the grapheme-based composite thin film as an electrode material, taking the sulfuric acid or saline solution as electrolyte solution, taking flexible plastics as packaging materials, and assembling into an electrochemical capacitor Through the method, the super capacitor which has higher weight capacity and volume capacity and has a flexible structure is obtained, and the application of the super capacitor can be further expanded in the fields of energy and electronic devices

Method for preparing graphene-based flexible super capacitor and electrode material thereof

The invention relates to the field of graphene electrode materials, and in particular relates to a doped graphene electrode material, a macro preparation method as well as an application of the doped graphene electrode material in a high-capacity high-multiplying-power lithium ion battery. In the invention, graphene is taken as a raw material. The preparation method comprises the following steps: controlling the temperature rising speed rate through shielding gas; introducing gas containing nitrogen or boron elements in different concentrations at high temperature so as to realize the doping of heteroatoms of the graphene, and get the nitrogen or boron doped graphene; mixing the doped graphene, conductive carbon black and a bonding agent; adding a solvent; coating the mixture on a current collector after grinding; taking the mixture after drying, shearing and tabletting as a working electrode; adding electrolyte containing a lithium salt by taking a lithium plate as a counter electrode /reference electrode; assembling into a button-type lithium ion half-battery in a glove box; and carrying out constant current charge and discharge tests under the condition of high current density. According to the invention, the electrode stability of the material under the condition of high current density is improved, and the fact that the doped graphene has higher specific capacity and excellent cycle performance in a shorter time is realized.

Doped graphene electrode material, macro preparation method and application of doped graphene electrode material

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Graphene/metal oxide composite cathode material for lithium ion battery and preparation

Method for preparing graphene-based flexible super capacitor and electrode material thereof

Doped graphene electrode material, macro preparation method and application of doped graphene electrode material