1143results about How to "Guaranteed electrical conductivity" patented technology

The invention relates to a Li-ion secondary battery cathode material preparation method with a nuclear shell structure; the preparation method is characterized in that: SiO, asphalt and graphite are weighted and are added in solvent for carrying out stirring; drying is carried out; the solvent is extracted out to obtain precursors which are uniformly distributed; the precursors are arranged in a high-temperature furnace, high-temperature sintering is carried out at inert atmosphere, the temperature is reduced to room temperature, so as to obtain the Li-ion secondary battery cathode material preparation method with the nuclear shell structure; meanwhile, the SiO, the asphalt and the graphite are chosen as initial raw material, so as to prepare the Si-SiO2-C electrode material with the nuclear shell structure, when the volume of the buffering Si material is expanded, the electricity-conducting capacity of the electrode material is ensured and the electro-chemical Li-embedded reaction property of the electrode material is improved; the asphalt is used as a carbon source, while reducing the product cost, the material is coated; a regular carbon layer structure is set up in the material body and on the surface, so as to improve the electricity-conducting performance of the material; the method has simple process and is suitable for large-scale industrial production.

The invention belongs to the field of lithium sulfur battery material, and in particular, relates to a lithium sulfur battery positive electrode material including a host material and elemental sulfurloaded on the host material; the host material includes carbon nanotubes and a transition metal sulfide compounded on the carbon nanotubes. The invention also discloses a preparation method and an application of the positive electrode material. According to the lithium sulfur battery positive electrode material, a strategy of adding the transition metal sulfide is adopted for reducing a back-and-forth shuttling effect; secondly, the carbon nanotubes are added to prevent the collapse of an electrode structure; the positive electrode material has excellent electrochemical performance, and is applied to a lithium sulfur battery to show high initial discharge capacity, high coulombic efficiency and high rate performance.

The invention provides a lithium ion battery negative electrode active material. The lithium ion battery negative electrode active material has a three-layer composite structure and comprises an inner core, an intermediate layer and an outermost layer, wherein the inner core is silicon carbon composite particles, the intermediate layer is a porous carbon layer, and the outermost layer is a compact carbon layer. The invention also provides a preparation method of the lithium ion battery negative electrode active material, a negative electrode comprising the negative electrode active material and a battery. By the lithium ion battery negative electrode active material, the technical problems that the volume of nanometer silicon particles in the silicon carbon negative electrode lithium ion battery in the prior art is expanded and the electrical conductivity is reduced are solved, meanwhile, an electrolyte can be effectively isolated by the compact carbon layer of the prepared negative electrode material, the electrolyte invasion is prevented, and the initial efficiency and the cycle property of the battery are improved.

The invention provides a recovery method of a positive active material in a lithium ion battery waste material. The method includes the following steps: S1, heat treatment of the waste material is performed at 350-500DEG C in inert gas or reducing gas atmosphere; S2, powder product obtained in the step S1 is sintered at 600-800DEG C in the inert gas or reducing gas atmosphere; and the positive active material is obtained by recovery; the positive active material is one or multiple substance selected from lithium phosphate, lithium silicate or a vanadium material of lithium. The positive active material obtained by recovery is high in charge and discharge capacity, and high in charge and discharge efficiency, the obtained positive active material is even in particle size distribution, and complete in crystal structure, the technical process of the recovery method is simple, the requirement on equipment is low, the process is easy to control, at the same time, the recovery process may not cause a negative impact on the active material, physical and chemical properties and electrochemical activity of the active material may not be affected, the recovery and reuse of the positive active material raw material can be realized, the cost can be saved, and the recovery method has environmental-friendly benefits.

The invention relates to a high-elasticity conductive fiber and a preparation method thereof. The preparation method includes that firstly, elastic yarns are subjected to preprocessing, secondly, a metal nanowire dispersion liquid is used for impregnating and coating the preprocessed elastic yarns and metal nanowires can be adsorbed to the surface of the elastic yarns, and thirdly, the elastic yarns with the metal nanowires adsorbed to the surface are subjected to hydrogen plasma processing or thermal processing.

The invention discloses a preparation method of a Cu-Nb multi-core composite wire with the rectangular cross-section, which comprises the following steps: firstly, carrying out first extrusion assembly and drawing for a single pure Nb rod and a first outer oxygen-free copper sheathing; secondly, carrying out second extrusion assembly and obtaining a first Cu-Nb multi-core composite filament; secondly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out third extrusion assembly; thirdly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out fourth extrusion assembly; and finally, setting and drawing by a rectangular mold. The invention has simple process step, short process, high production efficiency, low preparation cost and good use effect, and the produced Cu-Nb multi-core composite wire has superior performance; and the invention is suitable for mass production, can better control the dimensional accuracy of the rectangular cross-section, and can machine any size and length of hundred-million-magnitude-order Cu-Nb multi-core composite wires with the rectangular cross-section.

The invention relates to a substrate (1) for an organic light-emitting device (10), especially a transparent glass substrate, comprising, on a first main face (11), a lower electrode coating (3), the electrode coating (3) consisting of a thin-film multilayer comprising, in succession, at least: a contact layer (31) based on a metal oxide and/or metal nitride; a metallic functional layer (32) having an intrinsic electrical conductivity property; and an overlayer (34) based on a metal oxide and/or metal nitride, especially for matching the work function of said electrode coating, said substrate including a bottom layer (2), said bottom layer (2) covering said main face (11).

The invention relates to an enhanced conductive nylon material and a preparation method thereof. The enhanced conductive nylon material comprises the following raw materials in percentage by weight: 40 to 70 percent of nylon, 10 to 40 percent of glass fibers, 10 to 40 percent of metal powder, 0.1 to 5 percent of coupling agent, 0.1 to 0.5 percent of antioxidant and 0.5 to 5 percent of silicone oil. The invention provides a method for thermoplastic conductive plastics by attaching the metal powder to the glass fibers twice and mixing the glass fibers, the metal powder and plastics for pelleting by utilizing the characteristics of easy machining and dispersion of the glass fibers in the plastics, and the prepared thermoplastic conductive plastics have the characteristics of simple and convenient production process, uniform dispersion of the metal powder, small addition amount, controlled conductivity and smooth surfaces of products.

The invention discloses a composite bipolar plate for a PEM (proton exchange membrane) fuel battery and a preparation method thereof. The bipolar plate comprises an upper and lower surface layers prepared by using vermicular graphite as a base material, and a plurality of laminated plate unit preforms prepared by embedding conductive particles in organic substance films, wherein every two adjacent laminated plate unit preforms are provided with one or a plurality of conductive particle overlay areas to form one or a plurality of zigzag conductive paths. The preparation method comprises the following steps: sequentially laying the lower surface layer material, the laminated plate unit preforms and the lower surface layer material in a die, and carrying out die pressing twice to obtain the bipolar plate for a PEM fuel battery. The method enhances the production efficiency of the composite bipolar plate for a PEM fuel battery, and lowers the manufacturing cost; and the composite bipolar plate has the advantages of high bending strength, favorable conductivity and favorable air tightness.

The invention relates to a low-temperature electrolyte of a lithium iron phosphate battery. The low-temperature electrolyte includes the following solvents of, by volume, 30%-45% of carbonic ester solvent, 50%-65% of carboxylic ester solvent and 4%-10% of additive. The solvents contain solute lithium, the lithium is LiPF6 or a combination of the LiPF6 and LiBF4, and the concentration of the lithium is 0.8-1.4mol/L. The low-temperature electrolyte is a nonaqueous electrolyte, through optimization of kinds and proportioning combination of the solvents of the electrolyte, low-viscosity carbonic ester and low-melting-point carboxylic ester are selected and used, the freezing point at low temperature is lowered, and low-temperature conductivity is increased. According to the low-temperature electrolyte, the lithium of the electrolyte is optimized, the low-temperature additive is selected preferably, normal-temperature circulation ratio performance of the electrolyte is maintained, and meanwhile, the low-temperature capacity retention ratio of the lithium iron phosphate battery and the ratio performance of the lithium iron phosphate battery are improved. The commercial application requirements of the electrolyte can be met, the low-temperature performance of the electrolyte is improved particularly, and therefore the electrolyte is suitable for aerospace and plateau alpine environment.

The invention provides an electrode current collector material of a lithium ion battery and a method for preparing the material. The method comprises the following steps of: coating a carbon layer on the surface of a copper foil or an aluminum foil, wherein the thickness of the coated carbon layer is 0.003-0.015mm; and depositing the carbon layer on the surface of the copper foil or the aluminum foil by utilizing a physical vapor deposition method, and then carrying out thermal treatment. While ensuring the conductive property of the material as a current collector, the material improves the chemical property of easy oxidization of the foil in the working process of the battery, enhances the corrosion resisting property of the foil, and can effectively prevent a metal dendritic crystal produced by the lithium ion battery in the working process due to reaction, increase the safety performance of the battery, reduce the internal resistance of the battery and effectively prolong the service life of the battery. The process has the advantages of low temperature, less distortion and damage on the material, low energy consumption, less pollution and lower cost.

A conductive connecting sheet with a side composite metal structure comprises at least two foreign metal sheets. Each metal sheet comprises at least one copper metal sheet or nickel metal sheet, and the rest is a metal sheet at the price lower than the price of copper and nickel. Each metal sheet is arranged along the length direction of the conductive connecting sheet. The adjacent metal sheets are combined closely on an end face, and lap joint does not exist among the adjacent metal sheets. The production method comprises the following steps that: in the at least two metal strips, the adjacent metal strips are firmly combined on the adjacent side to form a side composite board strip by side composite technology; and the produced board strip is subjected to rolling and process annealing treatment to produce a final board strip with thickness the same as that of the conductive connecting sheet, and then is punched and formed along the transverse direction. The invention makes the bestof the advantages of combination of the side composite metal board strips, can ideally meet the requirement of the overall high-conductivity and the transition welding component, prevent the negativeeffect of the traditional lap joint and obviously save scarce metal and improve the waste recovery value.

The invention relates to an anode material of a lithium-sulfur battery, the lithium-sulfur battery and a method for preparing the anode material, and belongs to the field of battery materials. The center of the anode material is made of a functionalized carbon nano-material, the middle interlayer is made from sulfur, and the outer layer adopts a polydopamine film, wherein the functionalization method is hydroxylation or carboxylation. The preparation method comprises the following steps: dissolving the carbon nano-material in an alkaline or acid liquid to obtain the functionalized carbon nano-material; adding the functionalized carbon nano-material in a sulfur water solution, stirring, dropwise adding diluted acid to the solution, and obtaining the functionalized carbon nano-material coated with sulfur on the outer side; adding the functionalized carbon nano-material coated with sulfur on the outer side in a tris(hydroxymethyl) methane buffer solution, and performing a polymerization reaction to a dopamine hydrochloride solution, so as to obtain the anode material. The invention further relates to the lithium-sulfur battery using the anode material. The battery can further comprise a polyethylene diaphragm modified by polydopamine. The anode material can inhibit the shuttle flying effect and the structural damage caused by volume expansion; and the lithium-sulfur battery is good in cycle performance and capacity retention ratio.

The invention discloses a PVC (Polyvinyl Chloride)/graphite alkene antistatic composite material. The PVC graphite alkene antistatic composite material is prepared by the following ingredients in percentage by weight: 2-20% of a shock resistance modifying agent, 0.5-10% of an electric conductive filler, 2-20% of a processing agent and the balance of matrix resin. In addition, the invention also provides a preparation method of the PVC/graphite alkene antistatic composite material. Due to the adoption of the preparation method, the PVC has the antistatic property, and the enhancing and toughening are realized at the same time; and the surface resistivity of the prepared PVC/graphite alkene antistatic composite material is 104-108 omega, the volume resistivity is not more than 108 omega/cm, the tensile strength is not less than 50MPa, the impact strength is not less than 5kJ/m<2>, the elongation at break is not less than 75%, and the antistatic requirements on GB/T20105-2006 and MT164-2007 and MT165-2007 in the colliery industry are met.

The invention discloses a preparation method for a polymer material with a continuously-alternating layer structure. The preparation method comprises the following steps of step 1, premixing 30-70 parts of first resin or a first resin compound and 70-30 parts of second resin or a second resin compound, adding the premix in a double-screw extruder, performing melt blending and extrusion at a temperature of 100-300 DEG C, cooling, and slicing to obtain blend grains; and step 2, performing high-speed thin-wall injection forming on the obtained blend grains at an injection temperature of 100-300 DEG C and an injection speed of 50-1200 mm/s, so as to obtain the polymer material with a continuously-alternating layer structure. The preparation method disclosed by the invention is simple in the whole operation process, low in production cost, suitable for large-scale industrialized production, capable of regulating and controlling the thickness of the continuously-alternating layer structure by adjusting the component proportioning ratio of the blend, and suitable for various blend systems.

The invention relates to a welding method for a multi-layer metal strip. The method is characterized by comprising the following steps of: stacking the multi-layer metal strip to be welded to reach the required thickness, and aligning the multi-layer metal strip with the weld of another stacked multi-layer metal strip or metal plate; fixing a welding guiding plate of which the thickness is the same as that of the multi-layer metal strip to be welded at the starting end of a weld joint along the welding direction; selecting a stirring head, wherein the diameter of a shaft shoulder of the stirring head is 2 to 3 times the plate thickness, the length of a stirring needle on the stirring head is 0.05 to 0.2mm less than the plate thickness, and the press amount of the shaft shoulder is 0.1 to 0.3mm; and selecting rotation speed and welding speed according to a welding material, and welding. The method is energy-saving and environment-friendly, an operation process is greatly simplified, and production efficiency is improved; the quality of a joint is improved, the conductivity of the joint is ensured, and production cost is reduced; controllability is high, and industrial application is easy to implement; and the obtained joint has a compact structure, does not have any pore or crack and is slightly deformed, the operation process is simple, the production period is short, efficiency is high, and the production cost is low.

The invention discloses an ultrathin lithium-manganese polymer battery and a processing method thereof, belonging to the technology of lithium and manganese batteries. The technical scheme is that the ultrathin lithium-manganese polymer battery comprises an anode, a cathode, a diaphragm and an external packaging film. The anode consists of current collector aluminum foil, manganese dioxide, a conductive agent and a binder, the thickness of the anode is 0.03-0.2 mm, and the lead of the anode is formed in such a way that the extending part of the current collector aluminum foil outside the external packaging film is compounded with polypropylene or polyethylene. The cathode consists of a metal lithium sheet and a nickel strap or a copper strap or a steel strap, and the lead of the cathode is formed in such a way that the extending part of the nickel strap or the copper strap or the steel strap outside the external packaging film is compounded with polypropylene or polyethylene. The integral thickness of the battery is 0.3-0.5 mm. The processing method comprises the following steps of: (1) preparing the anode; (2) preparing the cathode; and (3) laminating and combining for molding. The invention solves the technical problem of great thickness of a traditional polymer battery, and has important significance for the generalization of various active identification cards.

The invention discloses a double-layer touch screen, which comprises transparent cover plate glass, a first transparent impressing adhesive layer, a first conductive layer, a second transparent impressing adhesive layer, a second conductive layer and an anti-reflection layer, wherein the first conductive layer is embedded in the first transparent impressing adhesive layer, and comprises a plurality of first bus-bars, and the first bus-bars extend along a first direction, and are formed by intersecting conductive silk threads; and the second conductive layer is embedded in the first transparent impressing adhesive layer, and comprises a plurality of second bus-bars, and the second bus-bars extend along a second direction, and are formed by intersecting conductive silk threads. Compared with the conventional touch screen, the double-layer touch screen has the advantages that indium tin oxide (ITO) is replaced by the first and second conductive layers formed by a conductive material filled in a first groove and a second groove, an additional etching technology is not required by such a process, the light transmittance and the electrical conductivity are ensured, and meanwhile, the material cost is lower, so that the cost can be lowered. The invention also discloses a preparation method for the double-layer touch screen.

The invention relates to the technical field of touch screens, and in particular relates to a touch screen, electronic equipment including the same and a method for manufacturing the same. The touch screen comprises driving electrode layers, a transparent polymerization organic matter layer and a metal bridge, wherein the metal bridge is used for conducting two adjacent driving electrode layers; and a protective layer for covering the metal bridge and preventing oxidization of the metal bridge is arranged between the driving electrode layers and the metal bridge. According to the touch screen provided in the invention, as the protective layer covers the metal bridge, the metal bridge is not subjected to an oxidation reaction due to the contact of the metal bridge and a transparent polymerization organic matter, thus the conductivity of the metal bridge is effectively guaranteed, the impedance of an oxidation layer is avoided from increasing, and the yield of the touch screen is improved.

The invention provides a preparation method of a cellulose-based flexible stress-strain sensitive material. The preparation method comprises the steps of: 1) adding cellulose into water and mixing uniformly to form a 0.2-5wt% aqueous solution, and freeze-drying the aqueous solution to prepare a cellulose aerogel; 2) subjecting the cellulose aerogel prepared in the step 1) to pyrolysis processing at high temperature of 600-1000 DEG C for 0.5 to 5 hours under the protection of vacuum or inert atmosphere to prepare a carbon gel; 3) and pouring PDMS resin in the carbon gel, and carrying out vacuum defoamation, thereby the flexible stress-strain sensitive material with high sensitivity is obtained after resin is solidified. The preparation method has the advantages of rich, chip and renewable raw materials, simple and controllable preparation process, and wide strain range and high sensitivity of the prepared stress-strain sensitive material; and the preparation method has good application prospect in aspects of structural health monitoring, electronic skin, biological medicine, wearable electronic product and the like.