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

1060 results about "Electro conductivity" patented technology

Electrical conductivity. Electrical conductivity is the ability of a material to carry the flow of an electric current (a flow of electrons). Imagine that you attach the two ends of a battery to a bar of iron and a galvanometer.

Preparation method of all-solid polymer electrolyte through in-situ ring opening polymerization of epoxy compound, and application of the all-solid polymer electrolyte in all-solid lithium battery

The invention discloses a preparation method of an all-solid polymer electrolyte through in-situ ring opening polymerization of an epoxy compound, and an application of the all-solid polymer electrolyte in an all-solid battery. The preparation method is characterized in that a liquid-state epoxy compound, a lithium salt, a battery additive and the like are employed as precursors and are injected into between a positive pole sheet and a negative pole sheet of the battery, and under a heating condition, in-situ polymerization solidification is carried out to form the all-solid polymer electrolyte, and furthermore, the all-solid battery is produced. The ionic conductivity at room temperature of the all-solid polymer electrolyte can reach from 1*10<-5> S/cm to 9*10<-3> S/cm and electric potential window is 3.5-5 V. The all-solid polymer electrolyte is prepared through the in-situ copolymerization method, so that the all-solid polymer electrolyte has excellent contact with electrodes, thereby greatly improving interface compatibility of the solid-state battery, reducing interface wetting and modification steps of the solid-state battery, reducing production cost of the solid-state battery and improving performances of the solid-state battery. The invention also discloses an all-solid polymer lithium battery assembled from the all-solid polymer electrolyte.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Three-layer composite wave-absorbing film and preparation method thereof

The invention discloses a three-layer composite wave-absorbing film and a preparation method thereof. The three-layer composite wave-absorbing film consists of an impedance matching layer, an absorption layer and a reflection layer, wherein the impedance matching layer consists of a dielectric material and an organic carrier; the absorption layer consists of magnetic particles and the organic carrier; the reflection layer consists of a carbon material with better electro-conductivity and the organic carrier; the thickness of the impedance matching layer is 0.1 to 0.3 millimetre (mm); the thickness of the absorption layer is 0.2 to 0.4 mm; and the thickness of the reflection layer is 0.1 to 0.3 mm. The preparation method of the three-layer composite wave-absorbing film comprises the following steps of: firstly, processing organic particles; secondly, uniformly dispersing the organic particles in an organic phase in a certain mode, and spreading to form a film; and finally, after a solvent of a first layer is completely volatilized, spreading a second layer and a third layer to form the three-layer composite wave-absorbing film. The three-layer composite wave-absorbing film has the advantages of high efficiency, light weight and low thickness, can be applied to electromagnetic shielding materials, and has a wide application prospect in ultra-thin radar wave-absorbing materials.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1

Method for preparing nano-sulfur / graphene oxide composite electrode material

The invention relates to a method for preparing a nano-sulfur / graphene oxide composite material with high specific capacity and belongs to the field of cross application of material synthesis and electrochemical power supplies. The nano-sulfur / graphene oxide composite material is applicable to an electrode material of a lithium sulfur secondary battery with the high specific capacity. The method is characterized by comprising the following steps of: synthesizing nano-sulfur particles by using a simple chemical method under the protection of a surfactant; and uniformly attracting graphene oxide and a carbon material to the surfaces of the nano-sulfur particles by interaction of the surfactant and the graphene oxide to form a core-shell type nano-sulfur / graphene oxide composite material. The graphene oxide and the carbon material coat a sulfur surface, so a sulfur electrode material is stable in structure, high in electric conductivity and high in cycle performance. Environmentally-harmful materials are not employed, and the method can be implemented at low temperature, and is low in energy consumption in the synthesis process and low in equipment requirement. The synthesized material is high in charging/discharging capacity, non-toxic and harmless to a human body, and sulfur is abundant in nature, so the material has a good industrial prospect and can be applied to large-scale industrial production.
Owner:SHANGHAI UNIV

High ionic conductivity solid electrolyte and preparation method thereof as well as application of high ionic conductivity solid electrolyte in all-solid-state lithium ion battery

ActiveCN108630985ASolve the micro short circuit problemSolve the problem of large interface impedanceSolid electrolytesSecondary cellsAll solid stateInterface impedance
The invention discloses application of a high ionic conductivity solid electrolyte layer in an all-solid-state lithium ion battery. An assembling step of the battery comprises the following steps: cutting a composite positive electrode and a composite negative electrode which are coated with films, uniformly coating the composite positive electrode or the composite negative electrode with electrolyte slurry, laminating the composite positive electrode and the composite negative electrode, drying the electrodes by blast air, then drying the electrodes in vacuum, baking the electrodes, welding tabs, performing vacuum packaging and cold-thermal pressing to realize close connection between electrolyte layers, and completing preparation of the all-solid-state lithium ion battery. The application has the advantages that the surfaces of the composite positive and negative electrodes are coated with the high ionic conductivity solid electrolyte layer and then are dried and sliced, and the surface of the cut composite positive electrode or composite negative electrode is uniformly coated with the electrolyte layer; before baking, the positive and negative electrodes are assembled, then dried by the blast air and assembled into the battery; and by twice coating of the electrolyte slurry, the problem of a micro short circuit of the full-solid-state battery and the problem of a relativelyhigh interface impedance between the electrolyte and composite positive and negative pole pieces as well as between one electrolyte layer and the other electrolyte layer can be effectively solved.
Owner:SUZHOU QINGTAO NEW ENERGY TECH CO LTD

Composite all solid-state polymer electrolyte lithium ion battery and preparation method of composite all solid-state polymer electrolyte lithium ion battery

The invention discloses a composite all solid-state polymer electrolyte lithium ion battery and a preparation method of the composite all solid-state polymer electrolyte lithium ion battery, and belongs to the all solid-state polymer electrolyte preparation technology and the lithium ion battery field. The composite all solid-state polymer electrolyte lithium ion battery disclosed by the invention comprises a battery case and an electrode core, wherein the electrode core is accommodated in the battery case in a sealed way and comprises a positive electrode, a negative electrode and composite all solid-state polymer electrolytes positioned between the positive electrode and the negative electrode, and the composite all solid-state polymer electrolytes comprise dimethyl siloxane-ethylene oxide copolymers, lithium salts and nanometer inorganic fillers. Compared with the existing composite all solid-state polymer electrolytes, the composite all solid-state polymer electrolytes adopted by the invention have the advantages that base materials are the dimethyl siloxane-ethylene oxide copolymers, the regularity of the polymer chain segment is reduced, and the crystallization degree of the polymers at the surface is reduced, so higher ionic conductivity is realized at normal temperature.
Owner:DONGFANG ELECTRIC CORP LTD

Electric heating element and method for its production

On the one hand is provided an electric heating element (15, 31) consisting of a semiconducting ceramic (28, 32) as well as a method for its production. The semiconducting ceramic material may be porous or foamed to thus contain pores (29, 34) open outwardly. The pores are attainable by admixing filler bodies, which dissolve during sintering, to the starting material or by impreganting a textile substrate material (36) with a ceramic material. Due to the porosity of the heating element (15, 31) an increased radiant surface area is attained. On the other hand is provided an electric heating element (115, 132, 145, 150, 158, 160, 162) as well as a method for its production which consists of semiconducting ceramic and comprises a negative temperature coefficient of the electrical resistance. The temperature coefficient is negative throughout over the full operating temperature range. The material suitable for the heating element (115, 132, 145, 150, 158, 160, 162) is doped silicon carbide or TiN. One such heating element (115, 132, 145, 150, 158, 160, 162) may be put to use, for example, rod-shaped in a radiant heater body (111) or foil-shaped at the underside of a surface element (30) of a cooktop (31). The electric conductivity of the material of the heating element (115, 132, 145, 150, 158, 160, 162) can be adjusted by nitrogen absorption during annealing in a nitrogen atmosphere subsequent to the sintering process.
Owner:E G O ELEKTRO GERAETEBAU GMBH

Low-temperature electrolyte for ternary power lithium ion battery and preparation method

InactiveCN103219544AImprove low temperature discharge efficiencyReasonable ratioSecondary cellsElectrolytic agentPower battery
The invention relates to the technical field of electrolyte for power lithium ion batteries, and in particular relates to low-temperature electrolyte for a ternary power lithium ion battery. The low-temperature electrolyte is characterized by consisting of lithium salt, an organic solvent and an additive, wherein the organic solvent accounts for 85% to 97% in mass percent while the additive accounts for 3% to 15% in mass percent; and the lithium salt is added to ensure that the concentration of the lithium salt of the electrolyte is 0.6 to 1.5 mol/L. The preparation method comprises the following steps of: adding the organic solvent with water content lower than 10ppm into a fluorinated bottle according to a proportion under the protection of dry inert gas for performing molecular sieve dehydration treatment, uniformly stirring the organic solvent until the water content of the organic solvent is 0 to 10ppm, adding the additive and the lithium salt according to set proportions into the uniformly stirred organic solvent, and uniformly stirring the three materials to obtain the required low-temperature electrolyte, wherein the temperature in an operation process is controlled to range from 8 to 12 DEG C. The electrolyte is low in melting point and viscosity and wide in temperature window range, has high electric conductivity at room temperature to -40 DEG C, and can be applied to the use of the ternary power lithium ion battery under a low-temperature condition.
Owner:山东威高新能源科技有限公司

Lithium battery graphene conductive paste and preparation method thereof

The invention provides a lithium battery graphene conductive paste. The lithium battery graphene conductive paste is characterized by consisting of 10 to 15 parts of graphite power, 0.5 to 2 parts of active agent, 0.5 to 1 part of dispersing agent, 0.2 to 0.3 parts of colloid material, 0.1 to 0.5 parts of carbon nano tube, 0.01 to 0.1 part of accelerant, 85 to 90 parts of solvent, and moderate viscosity modifier. By refining and activating graphite and further dispersing, grinding and stripping the graphite, and under the action of shear force and friction force of a grinding unit, a micron-grade accelerant is used as a micro force transfer medium, so that the graphite is stripped into the graphene, and meanwhile, the micron-grade accelerant, the graphene and the carbon nano tube are interweaved by the colloid material in the grinding process to form a composite micro colloidal particle; the composite micro colloidal particle has an excellent dispersibility in lithium battery anode and cathode active materials, so that the charge discharge efficiency of the active materials is substantially improved; and besides, the composite micro colloidal particle is compounded with the graphene and used for a lithium battery conductive agent, thus the carrier concentration can be remarkably improved, and the conductivity and discharge capacity of the battery active materials can be improved.
Owner:上海银浆科技有限公司

Copper-clad aluminum alloy composite conducting wire and preparation method thereof

The invention relates to a copper-clad aluminum alloy composite conducting wire and a preparation method thereof. The copper-clad aluminum alloy composite conducting wire comprises the following elements in percentage by mass: 0.5 to 1.0 percent of iron (Fe), 0.05 to 0.15 percent of magnesium (Mg), 0.15 to 0.3 percent of copper (Cu), 0.02 to 0.06 percent of boron (B), less than 0.1 percent of silicon (Si) and other impurities, wherein the sum of the contain percentage of manganese (Mn), chromium (Cr) and vanadium (V) in the impurities is less than or equal to 0.05 percent. The preparation method comprises the following steps of continuously extruding aluminum alloy wire poles at low temperature under the horizontal continuous casting by a cladding welding method; directly cladding copper layers outside the aluminum wire poles; and thus preparing the high-strength and high-conductivity copper-clad aluminum alloy composite conducting wire by a multi-stage cold drawing process and a finished product annealing process. The copper-clad aluminum alloy composite conducting wire has the advantages that the mechanical properties and the electric properties of the copper-clad aluminum alloy composite conducting wire are better than those of the conventional copper-clad aluminum and copper-clad aluminum magnesium alloy wires, and the copper-clad aluminum alloy composite conducting wire has the characteristics of high yield, low production cost and the like.
Owner:内蒙古蒙东高新集团有限公司

80-100mm hardenability aluminium alloy with super strength of 690-730Mpa and preparation method thereof

ActiveCN104004946ABreak the blockadeMeet aerospaceSolution treatmentStrontium
The invention provides 80-100mm hardenability aluminium alloy with the super strength of 690-730Mpa and a preparation method thereof. The 80-100mm hardenability aluminium alloy is characterized by mainly comprising aluminum, zinc, magnesium, copper, zirconium and strontium, wherein the mass percent of the zinc is 10.78-13.01%, the mass percent of the magnesium is 2.78-3.51%, the mass percent of the copper is 2.26-2.80%, the mass percent of the zirconium is 0.204-0.24%, the mass percent of the strontium is 0.0025-0.0751%, and the rest is aluminium and few impurity elements. The preparation method comprises the following steps: (1) casting; (2) carrying out homogenizing annealing (400 DEG C*6h+420 DEG C*6h+440 DEG C*6h+460 DEG C*12h); (3) carrying out hot extrusion (the extrusion ratio is 12); (4) carrying out solution treatment (450 DEG C*2h+460 DEG C*2h+470 DEG C*2h); and (5) carrying out aging treatment (121 DEG C*24h). The aluminium alloy has the advantages that the crystal particles of the aluminium alloy are very small (the average crystal particle size is less than 10 micrometers), the highest actual measurement strength of the aluminium alloy can reach 731 Mpa, meanwhile, the percentage of elongation of the aluminium alloy is 6.6%, the hardness of the aluminium alloy is 231.1HV, the electrical conductivity of the aluminium alloy is 25.9% IACS (International Annealed Copper Standard), and the end-quenching hardenability of the aluminium alloy in water is 80mm.
Owner:JIANGSU TIANNAN ELECTRIC POWER EQUIP

Electro-conductive fibers with carbon nanotubes adhered thereto, electro-conductive yarn, fibers structural object, and production processes thereof

Electro-conductive fibers comprise synthetic fibers and an electro-conductive layer containing carbon nanotubes and covering a surface of the synthetic fibers, and the coverage of the electro-conductive layer relative to the whole surface of the synthetic fibers is not less than 60% (particularly not less than 90%). The electric resistance value of the electro-conductive fibers ranges from 1×10−2 to 1×1010 Ω/cm, and the standard deviation of the logarithm of the electric resistance value is less than 1.0. The thickness of the electro-conductive layer ranges from 0.1 to 5 μm, and the ratio of the carbon nanotubes may be 0.1 to 50 parts by mass relative to 100 parts by mass of the synthetic fibers. The electro-conductive layer may further contain a binder. The electro-conductive fibers may be produced by immersing the synthetic fibers in a dispersion with vibrating the synthetic fibers to form the electro-conductive layer adhered to the surface of the synthetic fibers. The electro-conductive fibers have the carbon nanotubes homogeneously and firmly adhered to an almost whole of a surface thereof and have an electro-conductivity and a softness.
Owner:CHAKYU DYEING +2

Silver-plated carbon fiber-enhanced carbon-based pantograph sliding plate

The invention discloses a silver-plated carbon fiber-enhanced carbon-based pantograph sliding plate. A preparation method of the silver-plated carbon fiber-enhanced carbon-based pantograph sliding plate comprises the steps that pretreating is conducted by taking carbon fiber cloth as a raw material, a chemical silver plating solution is added into the pretreated carbon fiber cloth, and a well-plated silver layer is obtained; the silver-plated carbon fiber cloth, a copper mesh, short-cut carbon fibers, modified phenolic resin, graphite, copper powder, butadiene-acrylonitrile rubber and the like form mixed materials, the mixed materials are subjected to compression molding treating, hot-press sintering and steeping re-pressing, and then the silver-plated carbon fiber-enhanced carbon sliding plate can be obtained. According to the silver-plated carbon fiber-enhanced carbon-based pantograph sliding plate, by adding enhancement bodies such as the silver-plated carbon fibers into the carbon-based sliding plate, the electrical conductivity and the heat conductivity of the sliding plate can be improved, the bonding property and the interface bonding strength between internal materials including the carbon fibers and other components of the sliding plate are improved, the self-lubricating property of the sliding plate is improved, the service performance of the pantograph sliding plate in a high speed railway is further enhanced, and the service life of the pantograph sliding plate is prolonged.
Owner:SOUTHWEST JIAOTONG UNIV
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