297 results about "Carbon nanocomposite" patented technology

The invention is directed in a first aspect to a sulfur-carbon composite material comprising: (i) a bimodal porous carbon component containing therein a first mode of pores which are mesopores, and a second mode of pores which are micropores; and (ii) elemental sulfur contained in at least a portion of said micropores. The invention is also directed to the aforesaid sulfur-carbon composite as a layer on a current collector material; a lithium ion battery containing the sulfur-carbon composite in a cathode therein; as well as a method for preparing the sulfur-composite material.

The invention provides a manganese dioxide/carbon nanocomposite and a preparation method and application thereof. The preparation method comprises the following concrete steps: mixing an aqueous solution of permanganate, a carbon carrier and an aqueous solution of a divalent manganese salt; carrying out a reaction to produce a precipitate; and carrying out washing and drying so as to obtain the manganese dioxide/carbon nanocomposite. The preparation method has the advantages of easiness, rapidness, environment friendliness and easy realization of scale-up synthesis. The prepared manganese dioxide/carbon nanocomposite is applicable to a super-capacitor, a metal-air battery and a fuel battery.

The invention relates to a nickel disulfide carbon nano composite material and a preparation method and an application thereof, wherein the composite material is formed by coating a nickel disulfide nanosheet with a carbon layer. The preparation method comprises the following steps of preparing a nickel hydroxide nanosheet precursor by a hydrothermal method, performing magnetic stirring and dispersing in deionized water to obtain a uniform dispersion liquid of the nickel hydroxide nanosheet precursor, adding a buffering agent tris(hydroxymethyl) aminomethane hydrochloride, and adjusting the pHvalue to be 8.5 by adopting an alkali solution with the pH value of 13, adding dopamine hydrochloride, and magnetically stirring at room temperature for in-situ polymerization, and carrying out washing and centrifugally drying to obtain a nickel hydroxide nanosheet precursor/polydopamine composite material, and carrying out heat treatment and vulcanization with sublimed sulfur powder in a tubularfurnace in nitrogen atmosphere at a certain temperature to obtain the composite material. The preparation process is simple, easy to operate, green and non-toxic and friendly in material preparationprocess; and the prepared nickel disulfide carbon nano composite material is stable in structure, uniform in morphology and high in dispersion. The obtained nickel disulfide carbon nano composite material can be an ideal electrode material of a high-performance lithium ion battery, a supercapacitor and other new energy devices.

The invention relates to the technical field of nonmetallic mineral finish machining and inorganic processing, in particular to an attapulgite/graphite phase carbon nitride composite material. The attapulgite/graphite phase carbon nitride composite material takes attapulgite as a carrier and takes graphite phase carbon nitride as an active ingredient; the mass ratio of the attapulgite to the graphite phase carbon nitride is 1: 1 to 1: 10. By compounding the graphite phase carbon nitride with the attapulgite, the foreign ions in the attapulgite enter the crystal lattices of the graphite phase carbon nitride to increase the defects and change the energy level; the silicon oxide in the attapulgite can possibly form a heterojunction structure with the graphite phase carbon nitride so as to promote the transfer of photo-generated electrons and avoid the self-compounding of the photo-generated electrons; through the concerted catalysis action between the carrier and the active ingredient, the catalytic activity of the composite material is strengthened to a great extent.

The invention discloses an ultra-thin, self-supporting, flexible and all-solid-state super capacitor and a manufacturing method of the ultra-thin, self-supporting, flexible and all-solid-state super capacitor. The super capacitor comprises a position electrode, a solid electrolyte and a negative electrode, wherein the solid electrolyte is located between the positive electrode and the negative electrode to separate the positive electrode and the negative electrode, and the solid electrolyte evenly permeates inside a porous structure of the positive electrode and a porous structure of the negative electrode. The positive electrode and the negative electrode are made of carbon nanometer materials or carbon nanometer composite materials, and the outer side of the positive electrode and the outer side of the positive electrode are not completely embedded by the solid electrolyte and can be used for collecting currents. The thickness of the super capacitor is within the range of 10 nanometers to 10 micrometers, the inner portion of the capacitor is provided with no diaphragm, the outer portion of the capacitor needs no metal current collecting electrode or encapsulation, self-supporting can be realized, and at the same time the capacitor has high specific capacitance, high power density, high energy density, long life and high stability. The super capacitor has the advantages of being superior in performance, simple in manufacturing technology, and capable of satisfying the development demands of flexible, miniature, light electronic products at the same time, and having wide application prospects.

The invention is directed in a first aspect to electron-conducting porous compositions comprising an organic polymer matrix doped with nitrogen atoms and having elemental sulfur dispersed therein, particularly such compositions having an ordered framework structure. The invention is also directed to composites of such S/N-doped electron-conducting porous aromatic framework (PAF) compositions, or composites of an S/N-doped mesoporous carbon composition, which includes the S/N-doped composition in admixture with a binder, and optionally, conductive carbon. The invention is further directed to cathodes for a lithium-sulfur battery in which such composites are incorporated.

The invention relates to the technical field of performance enhancing and functionalization of carbon nanocomposite materials, in particular to a polymer thermal conductive film containing uniformly dispersed and highly oriented graphene and a preparation method thereof. The thermal conductive film material is composed of the following components: a polymer matrix, graphene, second thermal conductive filler, a surface treatment agent, a filler coating agent and a processing aid. A technical route combining "high shear melting dispersion" and "high stretching" is employed to promote the uniformdispersion of graphene nanosheets and other thermal conductive filler in the polymer matrix and the acquisition of high orientation, graphene itself is utilized to construct a long-range continuous and three-dimensional hybrid thermal conductive network structure, thus overcoming the anisotropy of graphene, and constructing a stable and effective thermal conductive network.

The invention discloses a high specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for a negative electrode of a lithium ion battery. A raw material, namely soluble ferric salt is solved in a mixed solvent of glycerol and distilled water; after low-temperature treatment, precipitates are collected, and a spindle-shaped iron oxide hydroxide (FeOOH) precursor is obtained; and after the precursor is subject to carbothermal reduction, the ferroferric oxide/carbon nano composite material with the same appearance is obtained. The invention discloses a preparation method of the spindle-shaped ferroferric oxide/carbon, which has the advantages that the operation is simple, convenient and simple to do, the used raw material has a cheap price, mass production is facilitated, and the synthetized spindle-shaped ferroferric oxide/carbon nano composite material shows high first time coulomb efficiency and high specific capacity when being used as the negative electrode of the lithium ion battery, and is a promising negative electrode material of the lithium ion battery.

The invention discloses a preparation method of a polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material. The preparation method comprises the following specific steps: dispersing graphene oxide into deionized water, and performing ultrasonic dispersion to obtain a negatively charged aqueous graphene dispersion; performing a refluxing reaction on gamma-aminopropyltriethoxysilane in a toluene solvent protected by a nitrogen atmosphere to achieve surface aminosilane modification of hydroxylated carbon nanotubes, dispersing the aminosilane-modified carbon nanotubes into deionized water, and dropwise adding a hydrochloric acid solution for pH adjustment to obtain a positively charged aminosilane-modified aqueous carbon nanotube dispersion; immersing perforated polymerfoam into the aqueous graphene dispersion, repeatedly squeezing, taking out after saturation, and drying in a drying box to obtain a polymer foam-based graphene composite material; then immersing thepolymer foam-based graphene composite material into the aminosilane-modified aqueous carbon nanotube dispersion, gently squeezing repeatedly and then drying. By the preparation method, the obtained conductive composite foam material has good flexibility, resilience and pressure-sensitive response.

The invention discloses a porous carbon-coated ZnO nanocomposite material and a preparation method thereof. The present invention adopts a simple method of coating and calcining to synthesize porous carbon-coated ZnO nanocomposite material, and the preparation process is simple. First, 2-methylimidazole and ZnO nanoparticles are used as raw materials to construct ZnO heterostructure material, and then The obtained material is calcined to obtain a layer of porous carbon nanocomposite material supported on the ZnO surface. That is, the porous carbon-coated ZnO nanocomposite material is obtained; the prepared material has great application prospects in the field of degrading organic dyes.

The invention discloses a lithium sulfide/carbon composite nanometer material and a preparation method and application thereof. In a relatively typical embodiment, the method comprises the steps of fully mixing lithium sulfate and a carbon material precursor or a carbon material, and performing thermal treatment, wherein the thermal treatment condition comprises a temperature rising rate of 1-20 DEG C per minute, a constant temperature of 600 to 1000 DEG C for 2-12 hours in an inert atmosphere; and natural cooling of the material to a room temperature to acquire the lithium sulfide/carbon composite material. The invention provides a process for synthesizing the lithium sulfide/carbon nanocomposite material by reducing lithium sulfate with carbon, the process is simple and easy to operate, is high in controllability and low in cost, the raw materials are low in price and easy to get, moreover, the obtained product is the lithium sulfide/carbon nanocomposite material which is uniformly dispersed, has good performance and is controllable in morphology, the lithium sulfide/carbon nanocomposite material comprises a one-dimensional nanometer fiber, a two-dimensional nanosheet and the like, and the lithium sulfide/carbon nanocomposite material is high in conductivity and can be widely applied to an electrochemical energy storage device such as a lithium-sulfur battery.

The invention relates to carbon nanotube/polypyrrole composite sponge and a preparation method thereof, belonging to the field of the synthesis and application of carbon nanocomposites. The carbon nanotube/polypyrrole composite sponge is formed through stacking and winding composite tubes with microcosmic core-shell structures and has a porous structure, wherein each composite tube consists of a carbon nanotube and a uniform-thickness polypyrrole layer coated outside the carbon nanotube. The mass content of polypyrrole in the composite sponge is controllable; the composite sponge has good elasticity, good cyclic compression stability and excellent electrochemical properties; the carbon nanotube/polypyrrole composite sponge is prepared by the method which combines a chemical vapor deposition method, an adsorption composite method and an electrochemical polymerization method; the preparation method has ingenious conception and is simple and easy in operation.

The invention relates to a nitrogen-doped porous carbon/sulfur composite material and a preparing method and application thereof. The composite material is formed by a coaxial nitrogen-doped porous carbon material and elemental sulfur through compositing. The preparing method of the composite material includes the steps that a coaxial nitrogen-doped porous polymer/one-dimension nanometer composite material is subjected to high temperature treatment in a tube furnace under inert gas protection to form the coaxial nitrogen-doped porous carbon material, and then heat treatment compositing is carried out on the coaxial nitrogen-doped porous carbon material and the elemental sulfur to obtain the nitrogen-doped porous carbon/sulfur composite material. A lithium-sulfur battery based on the composite material is provided at the same time, the battery shows high specific discharge capacity, cycling stability and good rate performance.

The invention relates to a carbon nano composite and a preparation method thereof. The carbon nano composite comprises a carbon nano material and metal particles, wherein the carbon nano material is subjected to surface functionalization, and the metal particles are formed on the carbon nano material. The carbon nano composite can be used for removing pollutants in waste water, and a removal effect is significantly better than that of the existing nano material.

The invention relates to an iron-carbon nano composite electromagnetic wave absorption material and a preparation method thereof. Carbonyl iron, methane and acetylene serving as main raw materials are directly synthesized into the iron-carbon nano composite material in a gas-phase reaction device at the temperature of between 300 and 1,000 DEG C. The nano composite material has good stability and uniformity. The iron-carbon nano composite material is wrapped outside iron nano granules by nano-scale C to form a C film; and the iron-carbon nano composite material has the characteristics of good electromagnetic wave absorption performance, wide absorption coverage frequency range, strong corrosion and oxidation resistance and low cost, and is applicable to electromagnetic shielding in a radio communication system, electromagnetic radiation and leakage of equipment of high frequency prevention, microwave heating and the like, construction of microwave darkrooms and hiding technology.

The invention discloses a double-metal co-doped carbon nano-composite material and a preparation method thereof. The composite material is prepared from a carbon substrate and ferrocene-phenylalanine and transition metal except iron, which are co-assembled on the carbon substrate through a non-covalent bond, wherein the ferrocene-phenylalanine, the transition metal except the iron and the carbon substrate commonly form a raspberry-like nanosphere structure. The invention further discloses a double-metal-nitrogen-carbon nano-catalyst obtained by mixing the composite material with dicyanodiamide and carbonizing and further provides application of the double-metal-nitrogen-carbon nano-catalyst to catalytic oxygen reduction reaction. The preparation methods of the composite material and the catalyst have simple steps and low cost and are suitable for large-scale application. The double-metal-nitrogen-carbon nano-catalyst provided by the invention has excellent electrochemical performance and has good methanol toxin resistance and stability, so that the double-metal-nitrogen-carbon nano-catalyst has a good application prospect in the field of the catalytic oxygen reduction reaction.

This invention relates to a method of preparing an iron carbide/carbon nanocomposite catalyst containing potassium for high temperature Fischer-Tropsch (FT) synthesis reaction and the iron carbide/carbon nanocomposite catalyst prepared thereby, and a method of manufacturing a liquid hydrocarbon using the same and a liquid hydrocarbon manufactured thereby, wherein a porous carbon support is uniformly impregnated with an iron hydrate using melt infiltration, and potassium is also supported together via various addition processes, including a pre-addition process of a potassium salt which is ground upon impregnation with the iron hydrate, or a mid- or post-addition process of a potassium solution using incipient wetness impregnation after impregnation with the iron hydrate. Accordingly, the highly active iron carbide/potassium/carbon composite catalyst for high temperature FT reaction in which 5˜30 wt % of active iron carbide particles are supported on the porous carbon support can be obtained and is structurally stable to heat even in high temperature FT reaction of 300° C. or more, and liquid hydrocarbons can be selectively obtained at high yields.

The invention relates to a preparation method and application of an iron carbide-cobalt/nitrogen doped carbon nano composite material. The preparation method specifically comprises the following stepsthat a, a mesoporous ordered KIT-6 silicon template is constructed; b, Co(NO3)2.6H2O and Fe(NO3)3.9H2O, melamine and P123 are injected into holes of the KIT-6 template; c, the mixture is subjected toannealing in an N2 environment to decompose Co(NO3)2.6H2O and Fe(NO3)3.9H2O to be subjected to a chemical reaction with carbon obtained by pyrolyzing the P123 and the melamine; and d, a product afterheat-treating is corroded with a NaOH solution. The obtained Fe3C-Co/NC composite material has a large specific surface area and quite good electrical conductivity and has quite good catalytic performance for oxygen reduction and electrolysis of water reaction of negative electrodes of alkaline fuel cells, and a new idea for rational design and construction of a multifunctional electrocatalyst isprovided.