Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

2028results about How to "High specific capacitance" patented technology

Multi-element composite nano-material, preparation method thereof and application thereof

The invention provides a multi-element composite nano-material for a super capacitor, and a preparation method of the nano-material. The nano-material comprises a carbon material, metal oxide and conducting polymer, and components of the nano-material can be two or more than two materials. By the aid of the characteristics such as fine electrical conductivity, long cycle life and high specific surface area of the carbon material, high pseudo-capacitance of the metal oxide and low internal resistance, low cost and high operating voltage of the conducting polymer, different types of electrode materials generate synergistic effects, advantages are mutually combined, shortcomings are mutually weakened, the energy storage characteristics of an electric double-layer capacitor and a pseudo-capacitor are simultaneously made full use of, a composite electrode material with high power density, fine circulating stability and higher energy density is prepared, and the multi-element composite nano-material is excellent in comprehensive performance when used for an electrode of the super capacitor, has the advantages of simple preparation process, short cycle, low cost and the like, and is suitable for large-scale industrial production.
Owner:中科(马鞍山)新材料科创园有限公司

Method for preparing electrodes of super capacitor based on nickel foam and products thereof

The invention discloses a method for preparing electrodes of a dissymmetric super capacitor based on nickel foam. The method comprises the steps: washing the nickel foam, soaking the nickel foam into a graphene oxide aqueous solution to obtain nickel foam in which graphene oxide deposits, serving the nickel foam in which the graphene oxide deposits as precursor materials, and respectively adopting a three-electrode method for preparaing a positive electrode and a negative electrode of the dissymmetric super capacitor, wherein the positive electrode is composed of composite materials of graphene, a carbon nanometer tube and the nickel foam, and the negative electrode is composed of composite materials of graphene, manganese dioxide and the nickel foam. The invention further discloses some other methods for preparing the electrodes of the super capacitor based on the similar principle, and products which correspond to the methods. By means of the methods and the products, respective high-ratio capacitance characteristics of the composite materials are fully played, and energy density of the super capacitor is improved. In addition, usage of various combined reagents can be avoided, and accordingly large-batch industrial production is conducted in a mode of convenient control, low cost and low energy consumption.
Owner:HUAZHONG UNIV OF SCI & TECH

Preparation method of transition metal oxide/carbon-based laminated composite material

InactiveCN104733712ALengthy process routeLong process routeHybrid capacitor electrodesCell electrodesNew energyConductive materials
The invention relates to a preparation method of a transition metal oxide / carbon-based laminated composite material. According to the preparation method, a conducting material such as metal carbide, metal nitride or metal carbonitride with a two-dimensional laminated structure is taken as a precursor, a gas containing oxygen elements is taken as an oxidant, and the two-dimensional conducting material is converted into the transition metal oxide / carbon-based laminated composite material by in-situ oxidation under the condition of controlling the oxidation temperature at 300-1000 DEG C and controlling the oxidation time at 1-300 min. The method disclosed by the invention has the advantages of simplicity and easiness in operation, controllable structure and morphology, controllable crystal form and electrochemical properties of metal oxides, and the like; the preparation method is environment-friendly, and nuisanceless, has no by-product, can be used for reducing the economic costs of traditional preparation methods, and can be popularized; and the transition metal oxide / carbon-based laminated composite material not only can be used as a key electrode material of a new energy storage device, but also can be used as a denitration catalyst, so that the material can be applied to the fields of environmental remediation, and the like.
Owner:EAST CHINA UNIV OF SCI & TECH +1

Composite nanometer carbon paper and preparation method thereof

The invention discloses composite nanometer carbon paper and a preparation method thereof. The nanometer carbon paper uses carbon nanometer paper as a framework network, MnO2 metallic oxides are deposited on the surface, the outer layer is covered with grapheme, and the composite nanometer carbon paper belongs to a flexible composite film material. The preparation method of the composite nanometer carbon paper comprises the steps that carbon nanometer tubes are dispersed in a solvent, then, the suction filtering is carried out to obtain carbon nanometer tube paper, next, the carbon nanometer tube paper is used as a carrier for depositing the MnO2 metallic oxides on the surface, and finally, the grapheme is adhered on the product surface to obtain target products. The electrical conductivity, the heavy current charging and discharging capability, the specific capacitance and the cycle life of the composite nanometer carbon paper are respectively and obviously enhanced through being compared with those of the carbon nanometer tube-MnO2, the problems that in the existing super capacitor, the metallic oxides easily fall off from the surface of the carbon nanometer tubes, the electrical conductivity of the metallic oxides is poor, and the like are solved, the composite nanometer carbon paper also has the characteristics of light weight and flexibility of materials and high efficiency, simultaneously, the preparation process is simple, the operation is easy, the controllability is good, and in addition, the cost is low. The composite nanometer carbon paper and the preparation method have wide application prospects in fields of new energy sources, advanced chemical engineering, electronic devices, film preparation and the like.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Preparation method of biomass-based nitrogenous porous carbon, porous carbon prepared by method and use thereof

The invention discloses a preparation method of biomass-based nitrogenous porous carbon, the porous carbon prepared by the method and the use of the prepared nitrogenous porous carbon in a super capacitor. The preparation method comprises the steps of (1) drying a biomass material, and grinding the biomass material into fine powders, (2) evenly mixing the biomass material powders and water or a dilute acid solution, (3) placing the above mixture into a reactor for hydrothermal reaction, and (4) drying and grinding an obtained hydrothermal reaction product, and calcining the hydrothermal reaction product in a tube furnace to obtain a nitrogen-doped porous carbon material with a large surface area. According to the method of the invention, cheap and renewable plant is used as carbon and nitrogen precursors, and the porous nitrogen-doped carbon material is prepared through a hydrothermal method. The method has the advantages of simple preparation process, no need of an activator or template agent, low cost, environmental protection, and convenient operation, problems of strong corrosion, a high price of transition metal and environmental pollution caused by heavy metal are avoided, and the method is suitable for mass production.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI +1

Graphene in-situ load needle-shaped Co3O4 composite electrode material and manufacturing method thereof

The invention discloses a graphene in-situ load needle-shaped Co3O4 composite electrode material and a manufacturing method of the graphene in-situ load needle-shaped Co3O4 composite electrode material. Single-layer graphene with needle-shaped Co3O4 growing on the edge or two faces is adopted as a load frame of the composite electrode material, the plane size of a nanosheet layer is one micron to 50 microns, and the manufacturing method comprises the steps that graphite oxide is manufactured through a modified Hummers method, then ultrasonic treatment is carried out to obtain graphene oxide, a precursor of the composite electrode material is manufactured through the graphene oxide, and the precursor is annealed in inert atmosphere to obtain the composite electrode material. The manufacturing method of the composite electrode material is simple and environmentally friendly, according to the typical structure of the composite electrode material, the needle-shaped Co3O4 is combined with the surface or the side face of the graphene, a quasi two-dimensional nano structure is formed, the graphene sheet layer can be loaded with the needle-shaped Co3O4 in situ, the cycle life of the Co3O4 is prolonged, and the specific capacitance and other good electrochemical performance are improved.
Owner:INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1

Active carbon for preparing carbon electrode of super capacitor and preparation method thereof

The invention discloses an active carbon for preparing a carbon electrode of a super capacitor and a preparation method thereof. The average particle size of active carbon particles is between 15 and 30 mu m, the specific surface area of the active carbon particles is between 3,000 and 3,400 m<2> / g and pore channels with pore diameters of between 2 and 5 nanometers account for 25 to 32 percent of all pore channels in the particles. The preparation method comprises the following steps of: mixing an amphipathic carbon material serving as a precursor and potassium hydroxide (KOH) and deionized water and stirring the mixture to obtain solution; drying the solution to obtain a solid mixture; and activating, washing, and drying the washed solid mixture to obtain the active carbon. The active carbon and the preparation method have the advantages that: the process for preparing the active carbon is simple; the amphipathic carbon material is soluble in water and is easy to be uniformly mixed with KOH, so not only the using amount of KOH is reduced but also the uniformity and high efficiency of an activating process are improved; and the prepared active carbon has a large specific surface area, high occupation ratio of the pore channels with particle sizes of between 2 and 5 nanometers in the particles, high specific capacity for manufacturing the electrode of the super capacitor and excellent heavy current performance.
Owner:成都佰思格科技有限公司

Metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and preparation method and application thereof

The invention discloses a metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material, and a preparation method and an application thereof. The preparation method comprises the following steps: uniformly grinding sublimed sulfur and conductive carbon black, and carrying out heat treatment fusion for uniform mixing to obtain sulfur and carbon black composite powder; and dissolving metal salt and hexamethylenetetramine in water, adding polyvinylpyrrolidone and the sulfur and carbon black composite powder, stirring, carrying out ultrasonic treatment to obtain a black mixed liquor, carrying out hydrothermal treatment on the black mixed liquor at 80-100DEG C for 2-5h, cooling, centrifuging, and drying to obtain the material. The metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material prepared in the invention inhibits the shuttle effect of polysulfide, improves the conductive performance of sulfur, and improves the cycle performances of batteries. The metal hydroxide coated carbon and sulfur lithium-sulfur battery positive electrode material is used to make a lithium-sulfur positive electrode, the lithium-sulfur positive electrode is applied in a lithium-sulfur battery, and the lithium-sulfur battery has high capacity and protruding cycle performances.
Owner:杭州亿昇达新能源科技有限公司

3D-nanostructure NiCo2S4 electrode material for super capacitor and preparation method thereof

The invention relates to a 3D-nanostructure NiCo2S4 electrode material and a preparation method thereof. The 3D-nanostructure NiCo2S4 electrode material is in a three-dimensional nanostructure formed through self-assembly of hexagonal NiCo2S4 nanosheets. The 3D-nanostructure NiCo2S4 electrode material is prepared through a hydrothermal method and a follow-up sulfuration process. The preparation method comprises 1) dissolving divalent cobalt salt and divalent nickel salt into an alkaline aqueous solution, and obtaining an intermediate product in a three-dimensional structure through hydrothermal reaction; and 2) dispersing the obtained intermediate product into a sulfur source solution so as to carry out hydrothermal sulfidizing processing, and thus the 3D-nanostructure NiCo2S4 electrode material can be obtained. On the basis of high seudocapacitance activity and high conductivity of the NiCo2S4 material, specific surface area is improved by forming the 3D nanostructure, and the obtained product is allowed to have excellent super capacitor performance; the hydrothermal and follow-up sulfuration processing processes are simple and are easy to operate and control; and the method is suitable for continuous large-scale production.
Owner:YANGZHOU UNIV

Method for preparing carbide film by carbonizing graphene reinforced polyimide resin

The invention discloses a method for preparing a carbide film by carbonizing graphene reinforced polyimide resin, and relates to a method for preparing a carbide film. The method solves the technical problems of high carbonizing temperature, high energy consumption, long carbonizing period and low carbonizing rate and low strength of the carbide film in the conventional method for preparing the carbide film. The method comprises the following steps of: 1, adding 4,4'-diamino diphenyl ether (ODA) and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) into N,N-dimethyl acetamide (DMAC), and performing mechanical stirring to obtain a polyamide acid (PAA) solution; 2, adding graphene into the PAA solution, and performing in-situ polymerization reaction to obtain a solution A; 3, spreading the solution A on a clean glass plate, heating to the temperature of 60 DEG C and preserving the heat for 2 hours, heating to the temperature of 100 DEG C and preserving the heat for 1 hour, heating to the temperature of 200 DEG C and preserving the heat for 1 hour, heating to the temperature of 300 DEG C and preserving the heat for 1 hour, and thus obtaining a composite film; and 4, carbonizing, naturally cooling to room temperature, and thus obtaining the carbide film. The carbide film has excellent mechanical properties; and because the adding proportion of the graphene is increased, the mechanical properties of the carbide film are improved, the specific capacitance of the graphene is also improved, and the carbide film is suitable to be used as an electrode material.

Method for preparing manganese molybdate/cobalt molybdate hierarchical heterostructure nanowires

The invention discloses a method for preparing manganese molybdate / cobalt molybdate hierarchical heterostructure nanowires. The method comprises the following steps of: preparing a NaMoO4 aqueous solution and a MnCl2aqueous solution; proportioning in a certain ratio of the NaMoO4aqueous solution to the MnCl2 aqueous solution to CTAB (Cetyltrimethyl Ammonium Bromide) to n-butyl alcohol to isooctane and preparing manganese molybdate nanorods by using a microemulsion method; adding the manganese molybdate nanorods into distilled water, stirring and ultrasonically cleaning to obtain transparent liquid; and adding the liquid into a flask, placing the flask in an oil bath of between 60 and 80 DEG C, condensing and refluxing, adding a CoCl2 solution and a Na2MoO4 solution with different concentrations in turn every certain time, stirring to react so as to obtain a product, separating and drying the product to obtain the manganese molybdate / cobalt molybdate hierarchical heterostructure nanowires, wherein the lengths of the nanowires reach 10 microns and the diameters of the nanowires are between 500 and 1,000nm; the manganese molybdate nanorods in the hierarchical heterostructure nanowires are used as a main material and the diameters of the manganese molybdate nanorods are between 300 and 500; and the cobalt molybdate is branch nanorods which orderly grow on the surfaces of the manganese molybdate nanorods and the diameters of the cobalt molybdate nanorods are between 30 and 50nm. The material has excellent electrochemical performance and can be used as an active material for electrodes of electrochemical super capacitors. The method has the advantages of low-cost raw materials, simple process and environmental friendliness.
Owner:武汉经开科创运营有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products