192results about How to "High electrical conductivity" patented technology

A positive-electrode active material with improved electrical conductivity, and a power storage device using the material are provided. A positive-electrode active material with large capacity, and a power storage device using the material are provided. A core including lithium metal oxide is used as a core of a main material of the positive-electrode active material, and one to ten pieces of graphene is used as a covering layer for the core. A hole is provided for graphene, whereby transmission of a lithium ion is facilitated, resulting in improvement of use efficiency of current.

A light-emitting device includes a light-reflecting layer, a first electrode disposed on or above the light-reflecting layer, a semi-transparent reflective second electrode, a light-emitting function layer disposed between the first electrode and the second electrode, and an electron-injection layer disposed between the light-emitting function layer and the second electrode. The second electrode is made of an Ag alloy having an Ag content of from 50% by atoms to 98% by atoms.

The invention discloses a compounding and a preparation method for lead-free electronic slurry used for a solar silicon photocell; according to the mass percentage, the slurry is obtained by preparing 70 to 75 percent of aluminium powders, 20 to 25 percent of organic adhesive, 1 to 5 percent of inorganic glass powders and 1 to 5 percent of additives; the aluminium powder is ball-shaped aluminium powder with the surface covered by an aluminium nitride protection layer, with the purity not less than 99.9 percent and the average grain size of 2 to 6 microns; simultaneously, organic adhesives consisting of ethyl cellulose, resin, hexadecanol, diethyleneglycol monomethyl ether, diethyleneglycol monobutyl ether, terpineol and n-butyl alcohol are added into the aluminium powder; the inorganic glass powder is silicon dioxide, boracic acid, alumina, antimony oxide and zirconia; the additive consists of Span and pump oil. The product prepared by the method of the invention has no dust generation or aluminium peeling phenomenon and achieves the requirement of no lead and environmental protection.

A lightning protection system is provided, typically for use on an outer surface of an aircraft, which includes the use of a lightning protection sheet that includes an electrically conductive film patterned into a plurality of hill features. The lightning protection sheet may additionally include an electrically non-conductive discriminator layer over the electrically conductive film.

The invention belongs to the technical field of carbon fiber materials, and particularly discloses a molybdenum disulfide nanosheet / nitrogen-doped carbon fiber hybrid material and a preparation method therefor. The molybdenum disulfide nanosheet / nitrogen-doped carbon fiber hybrid material is prepared by growing a molybdenum disulfide nanosheet on a nitrogen-doped carbon fiber with a three-dimensional network structure in situ by taking molybdenum salt and sulfosalt as precursors; A preparation process for the molybdenum disulfide nanosheet / nitrogen-doped carbon fiber hybrid material comprises: preparing the nitrogen-doped carbon fiber through in-situ oxidization-reduction reaction, freeze-drying and high-temperature carbonization; and growing the molybdenum disulfide nanosheet on the nitrogen-doped carbon fiber in situ through a one-step solvothermal method. According to the nitrogen-doped carbon fiber prepared by the preparation method, the wettability of the carbon fiber and a solvent is improved, and more active sites are provided for growth of inorganic particles; and moreover, the electrical conductivity of the carbon fiber is greatly improved, so that the migration rate for electrons in an electro-catalysis hydrogen-evolution process is increased. The molybdenum disulfide nanosheet / nitrogen-doped carbon fiber hybrid material prepared by the preparation method can be used as an ideal high-performance catalyst material and can be used for the electro-catalysis hydrogen-evolution field.

The invention relates to a flake MoS2 / graphene composite aerogel and a preparation method thereof and belongs to the technical field of anode materials of lithium ion batteries. The preparation method comprises the following steps: ultrasonically dispersing a certain quantity of graphene oxide solution into deionized water, adding a certain quantity of water-soluble molybdate and thiourea, then adding 0.1-3mL organic amine solution, taking out a cylindrical product after hydrothermal reaction at the temperature of 160-240 DEG C, freeze-drying, and then carrying out thermal treatment for 2h in the mixed atmosphere of argon and hydrogen at the temperature of 800 DEG C to obtain the flake MoS2 / graphene composite aerogel. According to the flake MoS2 / graphene composite aerogel and the preparation method thereof disclosed by the invention, thin layers of graphene are connected with one another in a staggering mode to form a three-dimensional ordered conductive network and form micron pore canals, MoS2 is uniformly dispersed on the ultra-large superficial area, and thus, the problems of volume expansion and crushing materials are effectively solved; meanwhile, the structure stability and the cycle performance of the flake MoS2 / graphene composite aerogel, serving as the anode material, are improved.

There are provided an electrode material for a lithium secondary battery which comprises alloy particles comprising silicon as a major component and having an average particle diameter of 0.02 μm to 5 μm, wherein the size of a crystallite of the alloy is not less than 2 nm but no more than 500 nm and an intermetallic compound containing at least tin is dispersed in a silicon phase and an electrode material for a lithium secondary battery which comprises alloy particles comprising silicon as a major component and having an average particle diameter of 0.02 μm to 5 μm, wherein the size of a crystallite of the alloy is not less than 2 nm but no more than 500 nm and an at least one intermetallic compound containing at least one element selected from the group consisting of aluminum, zinc, indium, antimony, bismuth and lead is dispersed in a silicon phase. Thereby, an electrode material for a lithium secondary battery, an electrode structure comprising the electrode material and a secondary battery comprising the electrode structure are provided in which a drop in capacity due to repeated charging / discharging is small, and the charge / discharge cycle life is improved.

The invention provides a preparation method of slurry for an electrode of a supercapacitor, the electrode of the supercapacitor and a preparation method of the electrode of the supercapacitor. A eight-stage slurry preparation process is adopted in the preparation method of the slurry, and the preparation method of the slurry comprises the following steps of: I, dry mixing; II, wet mixing; III, lumping; IV, rubber mixing; V, roasting; VI, pelleting; VII, smashing; and VIII, slurry forming. The preparation method of the slurry can be used for increasing the solid content of the slurry, reducing the using amount of an adhesive, improving the dispersing effect of the slurry, realizing the quantitative control for the slurry preparation process and achieving better process stability and consistency. The electrode prepared by using the slurry has the advantages that the strength of the electrode is enhanced, the internal resistance of the electrode is reduced, the electrochemical stability and the structural stability of the electrode are improved, the reliability of the supercapacitor with the electrode is improved, and the service life of the supercapacitor is prolonged.

A capacitive touch display panel includes a first substrate, a second substrate, an opaque pattern, a plurality of transparent conductive sensor pads, and a plurality of non-transparent conductive patterns. The first substrate and the second substrate are disposed oppositely. The transparent conductive sensor pads are disposed on the second substrate. The non-transparent conductive patterns are disposed on the second substrate, and the non-transparent conductive patterns and the transparent conductive sensor pads are electrically connected and overlapping. The conductivity of the non-transparent conductive patterns is higher than that of the transparent conductive sensor pads, and the non-transparent conductive patterns are corresponding to the opaque pattern.

The present invention relates to a method for manufacturing a graphene fiber and a graphene fiber manufactured thereby, comprising the following steps: a) preparing a dispersion liquid by dispersing graphene with a surfactant in a solvent; b) preparing a composite fiber by mixing the dispersion liquid with a polymer solution, wet spinning and drying same; and c) removing polymers by heat-treating or treating the composite fiber with strong acid. The graphene fiber manufactured by the method has superior electric and mechanical properties, is flexible, and can be utilized as a storage medium for energy, hydrogen, etc. due to porosity from having a wrinkled structure.

The invention discloses a conductive agent combined type lithium ion battery positive pole piece, which comprises a current collector and a positive pole film adhered to the current collector. The positive pole film comprises a positive pole active material, a conductive agent and a binding agent, wherein the conductive agent is a combination of CB and CNTs or CB and GNPs or CNTs and GNPs or CB, CNTs and GNPs. A manufacture method comprises the steps of (1) adding the binding agent into solvent and evenly stirring and mixing; (2) adding the conductive agent combination of two or three of CB, CNTs and GNPs into the solvent and evenly stirring and mixing; (3) adding the positive pole active material and evenly stirring and mixing to obtain positive pole slurry; (4) coating the positive pole slurry on the current collector and obtaining the lithium ion battery positive pole piece after roasting and rolling. The positive pole piece is high in energy density, low in expansion rate, high in coulombic efficiency and high in compaction.

The object of the present invention is to provide linked stacks of reduced graphene, in which excellent electrical property on the surface of graphene may be utilized, a method for producing the same, powder comprising the same, and film comprising the same. The object may be solved by using linked stacks of partly reduced graphene 11 comprising two or more stacks of partly reduced graphene 21 to 24 linked together, in which the stack of partly reduced graphene 21 has two or more sheets of partly reduced graphene 31 and a nanosubstance 32 held between the sheets of partly reduced graphene 31, the partly reduced graphene 31 has no carbonyl groups and has carboxyl groups 31a and hydroxyl groups 31b, and different stacks of partly reduced graphene 21 to 24 are linked to each other by an ester bond 34.

A contact slidable structure is formed between a resilient terminal and a terminal electrode. The terminal electrodes and are disposed on the ceramic element. The resilient terminals and are resiliently deformed and forced to press the terminal electrodes and. The ceramic element has the ceramic body, inner leads and formed inside the ceramic body, terminal electrodes and disposed on the outer surfaces and, and conductive through holes and electrically connecting the inner leads and with the terminal electrodes and, respectively. In the ceramic element, the resilient terminals and are placed slidably on the outer surfaces and of the terminal electrodes and to form the contact slidable structure, and the conductive through holes and are not formed within the contact slidable areas and to the terminal electrodes and, respectively.

The invention provides a polyaniline-carbon layer-titanium nitride nanowire array composite material. The polyaniline-carbon layer-titanium nitride nanowire array composite material comprises a carbon substrate (1), titanium nitride nanowire arrays (2), an unformed carbon layer (3) and a polyaniline film (4); the titanium nitride nanowire arrays (2) are vertically arranged on the surface of the carbon substrate (1) and interconnected to form an integral structure; the unformed carbon layer (3) completely warps the surfaces of the titanium nitride nanowire arrays (2); the polyaniline film (4) completely wraps the surface of the carbon layer (3). The invention further provides a preparation method of the composite material, and application of the composite material in electrochemical energy storage in a super-capacitor. The polyaniline-carbon layer-titanium nitride nanowire array composite material has the characteristic of sequentially arranged housing-housing-kernel coaxial heterogeneous nanometer line structures; the composite material can be directly applied to electrode materials of the super-capacitor and can achieve effective electrochemical energy storing effect.

The invention discloses a ferrite-based ceramic composite material as well as a preparation method and application thereof. The composite material is composed of ferrite, a carbon nanotube and a ceramic material, wherein the ferrite and the ceramic material are cladded on the tube wall of the carbon nanotube, and the ceramic material is one or several kinds of aluminum oxide, aluminum nitride, and silicon nitride. The three phases of materials, namely, the ferrite, the carbon nanotube and the ceramic, are compounded to make the advantages and disadvantages of all phases of materials complementary, so that the electrical conductance of the composite material is increased, the impedance matching performance of the composite material is improved, the wave absorption performance of the composite material is made adjustable, the structure and function integration of the ferrite-based ceramic material is realized, and thus, the application range of the composite material in the high-tech field is expanded. In addition, the powder of the composite material is prepared by adopting a coprecipitation hydrothermal method and is further prepared into a block material by adopting a microwave sintering method, and the ferrite-based ceramic composite material has the advantages that all phases are dispersed uniformly, the densification degree of the sintered material is high, the production cost is low, and the large-scale industrialization is easy to realize.

The invention relates to an anion-exchange membrane and a preparation and application thereof, and provides an anion-exchange membrane with a side chain containing multi-nitrogen heterocycle cation as an ion guide group, and a preparation method of the anion-exchange membrane. A route of firstly salifying and then making the membrane is adopted in the preparation method of the anion-exchange membrane, wherein a salifying process is a homogeneous reaction which is easy to carry out; and a microphase separation structure is easy to form in a casting membrane-forming process, thus conductance property of the anion-exchange membrane is facilitated to be improved, and the anion-exchange membrane has higher conductivity and stability.

An electrically conductive composition, containing (A) a carbon nanotube, (B) an electrically conductive polymer, and (C) an onium salt compound, an electrically conductive film using the composition, and a method of producing the electrically conductive film.

The invention discloses a silicon-based composite anode material for a lithium ion battery and a preparation method thereof. The anode material comprises a graphite skeleton and an amorphous carbon layer which coats the graphite skeleton. The graphite skeleton is filled with a silicon material coated with a carbon-containing structure. The silicon material and the graphite skeleton are combined through a loose carbon material. The preparation method at least comprises the following steps: (1) preparing the silicon material coated with the carbon-containing structure; (2) preparing spherical particles with graphite as the main body; (3) coating the spherical particles with the amorphous carbon layer; and (4) granulating. According to the invention, the electric insulation problem of silicon anode due to its volume change can be solved, and it can be guaranteed that silicon active component can always be electrically contacted with a current collector during the charge-discharge cycle process. Meanwhile, huge stress effect caused by volume expansion / shrinkage of the active material silicon is further buffered. Then, the composite material has characteristics of high electrochemical cycle stability and regulable specific capacity.

The invention provides a method for preparing a titanium niobate and carbon nanotube composite material and a lithium ion capacitor with the material as the negative electrode. The composite material is obtained in the mode that a titanium source, a niobium source and carbon nanotubes are added to be mixed, solvent thermal treatment is performed, and the mixture is dried and baked in two steps. The production process is simple, and the material is easy to being produced on a large scale. The obtained titanium niobate and carbon nanotube composite material increases the product specific surface area and improves overall electric conductivity. The capacitor manufactured with the composite material as the negative electrode is high in work voltage and long in cycle life, the specific energy of the capacitor is far higher than that of a common electro-chemical capacitor and can be above 50 Wh.Kg-1, and high practical value is achieved.

Disclosed are a method of manufacturing a reduced graphene oxide pattern which includes forming a graphene oxide pattern on a substrate and providing the graphene oxide pattern with a white light pulse to reduce the graphene oxide, a reduced graphene oxide obtained by the method, and an electronic device and a thin film transistor including the reduced graphene oxide.

This invention discloses a valve-controlled lead-acid storage battery used in subway cars composed of a battery tank, a cover, positive pole plates, negative pole plates, glass fiber baffles, a colloidal electrolyte, a safety anti-explosion valve, terminals and collecting bars, among which, said positive and negative pole plates are isolated by the glass fiber membranes, laminated and pressed in the battery tank, the ears are connected with the terminals by the collecting bars, the tank and the cover are sealed by hot seal, anti-acid and anti-ageing silico-fluoride rubber coil is set between the terminal and the cover to be fixed by plastic nuts and glued by resin, the shell is filled with colloidal electrolyte and the exhaust valve is installed on the valve base on the cover.

The invention discloses lithium ion battery gel electrolyte with a multi-stage structure and a preparation method thereof. The lithium ion battery gel electrolyte with the multi-stage structure comprises a polymer network cross-linking framework and a liquid electrolyte in the network framework, wherein the polymer network physical cross-linking framework is composed of nano fibers of PVDF (Polyvinylidene Fluoride) electrostatic spinning, and the cross-linking framework is adsorbed to two sides of a base PE (Poly Ethylene) film. The preparation method comprises the following steps: 1) preparing an electrostatic spinning solution; 2) preparing a first-level framework structure by electrostatic spinning; 3) coating a polymer so as to prepare a second-level framework structure; and 4) carrying out high-temperature in-situ polymerization so as to prepare a PMMA (Polymethyl Methacrylate) gel polymer three-level framework structure. The gel frameworks are distributed in a level-by-level structure, and compared with a conventional gel system, the macromolecule cross-linking system of the multi-level structure has the advantages of high mechanical intensity, high fluid protection capability, high porosity of the network structure, high conductivity and the like, and paves the way for the research of a new generation of gel electrolytes.

The invention embodiment provides an anode material, a preparation method thereof, a negative plate, and a lithium ion battery. The anode material comprises a plurality of first particles and a crosslinking polymer; close packing of the first particles is realized through the crosslinking polymer so as to form a second particle; the first particles comprise a silicon core and a housing material coating layer; and a cavity is formed between the inner silicon core and the housing material coating layer. According to the anode material, the micron grade large particle is formed via close packingof the plurality of nanometer grade small particles through the crosslinking polymer, so that when the anode material is taken as a battery negative electrode, battery energy intensity is increased effectively.

The invention relates to acidic ionic liquid and a method for obtaining objective metals or removing poisonous metals from metal solid-phase matters. The method comprises the following steps: (1) taking the acidic ionic liquid of the invention as an extraction agent, and carrying out solvent extraction on metal solid-phase matters; and (2) carrying out electrolysis on an extract of the step (1) to obtain the objective metals or remove the poisonous metals, wherein the metal solid-phase matters comprise the following components: (a) indissolvable oxide, chloride, phosphate compounds or hydroxide of the objective metals, (b) a mixture of indissolvable oxides of various metals, (c) spent fuels containing poisonous metals and the like. By the method, the use amount of acid and organic solvents can be reduced effectively. In addition, by characteristics of low volatility, high electric conductivity and the like of the acidic ionic liquid, required energy during electrolysis is reduced, costs and environmental harm in a metallurgical process are reduced, and environmental protection property of the process is improved. The method has great value on the industry.

The invention provides a preparation method of a nitrogen-doped graphene electrode, which comprises the following steps: acquiring a graphene oxide suspension; mixing the graphene oxide suspension with a metal salt solution to obtain an electrolyte; putting at least one pair of electrode pieces connected with direct current into the electrolyte, switching on the direct current to carry out electrophoresis so as to obtain electrode pieces with graphene oxide deposited on the surface, and drying under vacuum conditions; reacting the graphene oxide deposited on the surface of the dried electrode pieces with ammonia gas to carry out nitrogen doping reaction, thereby obtaining a nitrogen-doped graphene electrode precursor; and in a hydrogen protective atmosphere, carrying out reduction reaction on the nitrogen-doped graphene electrode precursor and hydrogen to obtain the low-oxygen-content graphene-doped graphene electrode. The preparation method provided by the invention has the advantages of simple technique, high efficiency and low cost; and the nitrogen-doped graphene electrode prepared by the method has the advantages of low equivalent series resistance, high electric conductivity and low oxygen content in the nitrogen-doped graphene in the nitrogen-doped graphene electrode.

The invention provides a preparation method of a sodium titanate nanofiber material and a sodium ion capacitor using the material as a negative electrode. The composite material is obtained by the steps of performing mixing on a sodium source, a titanium source and an electrospinning solution, and carrying out electrostatic spinning treatment, drying treatment and two-step baking treatment. The production process is simple, and the scale production is easy to expand. The porous sodium titanate nanofibers and the sodium titanate-carbon nanofiber composite can be obtained by adjusting the calcining atmosphere. The obtained sodium titanate nanofiber material has the advantages that the specific surface area of the product is increased, and meanwhile, the ion / electron diffusion path of the material is shortened. The sodium ion hybrid capacitor prepared by taking the nanofiber material as the negative electrode is high in working voltage and long in cycle life; and the specific energy of the sodium ion hybrid capacitor is far higher that of the common electrochemical capacitor, which can reach 55Whkg-1, so that the composite material has very high practical value.

The invention relates to a silicon, silicon-oxygen-carbon and graphene-based composite material, which comprises a graphene-based material and a silicon nano-material, wherein the silicon nano-material is attached to the surface of the graphene-based material; and the silicon nano-material is connected with the graphene-based material through a silicon-oxygen-carbon chain structure. The invention further provides a preparation method of the composite material. The silicon-oxygen-carbon structure contained in the composite material provided by the invention can ensure that the silicon material is relatively uniformly and firmly distributed on the surface of a graphene-based material, and can still electrically contact the conductive graphene-based material in the charge-discharge process after a relatively large volume change; and the graphene-based material not only can ensure the overall conductivity of the material, but also can relieve stress of the silicon material caused by the volume change in the charge-discharge process through folds. The composite material provided by the invention is excellent in overall performance, and has the characteristics of high electrochemical cycle stability and adjustable specific capacity.

The invention discloses a preparation method of a niobium pentoxide / reduced graphene oxide composite negative electrode material. The preparation method comprises the following steps of (1) mixing graphene oxide nanosheets with water and carrying out stirring and ultrasonic dispersing to obtain graphene oxide nano-dispersion; (2) dissolving niobium pentachloride into water and stirring to obtain niobium pentachloride suspension, sequentially adding an organic cosolvent and hexamethyleneteramine into the niobium pentachloride suspension and stirring to obtain a white solution; (3) mixing the graphene oxide nano-dispersion with the white solution, stirring until uniform dispersion to obtain a mixed solution, putting the obtained mixed solution into a high pressure reactor to carry out hydrothermal reaction; (4) after hydrothermal reaction is completed, washing and drying the obtained sediments to obtain solid powder; and (5) carrying out thermal treatment on the solid powder in argon atmosphere. The preparation method is convenient to operate and controllable in reaction conditions; and a lithium battery provided with a negative electrode prepared from the obtained composite negativeelectrode material has excellent cycle performance and rate capability.

The invention relates to a co-doping polypyrrole material as well as a preparation method and an application thereof. The preparation method is characterized by comprising the steps: obtaining a polypyrrole / anthraquinone / graphene oxide composite material in a liquid which is formed from pyrrole monomer, anthraquinone-2-sodium sulfonate and graphene oxide by utilizing an electrochemical deposition method, and then electrochemically reducing the polypyrrole / anthraquinone / graphene oxide composite material to obtain the polypyrrole / anthraquinone / graphene oxide composite material. The preparation method can be carried out under the normal temperature, equipment is simple and easy to operate, and the selection range of the used co-doping system is wide. The porous micro-nano polypyrrole material prepared through the preparation method is excellent in conductivity and electrochemical performance and can be applied to a flexible energy storage device.

A fuel cell provides a high output at a high current density. The fuel cell has an anode electrode and a cathode electrode comprising a gas diffusion layer, a water-repellent layer disposed on the gas diffusion layer and containing a carbon material and polytetrafluoroethylene, and an electrode catalyst layer disposed on the water-repellent layer and containing a carbon material carrying a catalyst. The electrode catalyst layer has maximum and minimum thicknesses that differ from each other by less than 30 μm. The electrode catalyst layer has cracks whose area is less than 10% of a total area of the electrode catalyst layer.