Method of conductive layer forming on carbon nanotube base
SUBSTANCE: invention refers to electrical engineering, particularly to methods of conductive layer formation used in wide range of technics, including electronics or electrical equipment, and can be applied to form conductive links in microcircuits. Method of conductive layer formation on carbon nanotube base involves application of suspension of carbon nanotubes and carboxymethyl cellulose in water onto substrate, with the following component ratio, wt %: carboxymethyl cellulose 1-10, carbon nanotubes 1-10, drying at 20 to 150°C, pyrolysis at temperature over 250°C.
EFFECT: enhanced electric conductivity of layers formed.
4 cl, 1 tbl
The invention relates to the field of electrical engineering, in particular to methods for creating electrically conductive layers applied in broad areas of technology, including electronics, and can be used, for example, to create a conductive connection in circuits.
Currently known technical solution "Nanostructured composites" in the American patent application US 2010/0068461 A1 (IPC VS 39/02; VV 3/10 published 18.03.2010 g) obtaining nanostructured composite electrically conductive material using arrays of carbon nanotubes (CNTS) and the polymer matrix. As the polymer matrix used materials from the following groups: acrylates, acrylic acid, polyacrylic esters, polyacrylamides, polyacrylonitrile, chlorinated polymers, fluorinated polymers, polymers of styrene, polyurethane, rubber, synthetic rubber polymers, vinyl chloride-acrylate polymers, copolymers, and combinations thereof. The disadvantage of this method of obtaining nanostructured electrically conductive material is a multi-stage process of forming electrically conductive material, the use of structured arrays of CNTS, limiting the maximum geometrical dimensions of electrically conductive material and a low electric conductivity was obtained about the ukta.
The closest to the essential features (prototype) of the invention is the method described in the application U.S. for the invention of "Carbon nanotube-conductive polymer composites, methods of making and articles made therefrom" US 2012/0058255 A1 (IPC B05D 5/12; H01B 1/02; H01B 1/04; H01B 1/12 published on 08.03.2012 year). In this invention to create a composite conductive material is a conductive polymer with the addition of functionalized carbon nanotubes. This functionalization of CNTS produced by various groups, including: -COOH, -HE-COOAg group. Signs consistent with the claimed invention, are applied to the substrate suspension containing the carbon nanotubes, drying at temperatures up to 150°C.
To obtain the desired technical result prevent the use of only functionalized carbon nanotubes, conducting additional processing CNT for the formation of functional groups on the surface of CNTS, the use of conductive polymers to improve the conductivity of the resulting material, which reduces the amount of organic compounds as polymer matrix and restricts the use of the obtained electrically conductive material.
The present invention is to provide a method of forming a conductive layer based on carbon nanotubes is K.
The technical result consists in extending the functionality of the method of forming a conductive layer on the basis of the carbon nanotubes in the CNT without additional chemical treatment after synthesis, to increase the conductivity of the formed layers.
To achieve the above technical result of the method of forming a conductive layer on the basis of the carbon nanotubes comprises applying to the substrate a suspension containing the carbon nanotubes and the solution of carboxymethylcellulose in water in the following ratio, wt.%: carboxymethylcellulose 1-10 and 1-10 carbon nanotubes, drying at a temperature of from 20 to 150°C, the pyrolysis at a temperature of 250°C-300°C.
From the prototype of this method differs in that caused the suspension contains a solution of carboxymethylcellulose in water in the following ratio, wt.%: carboxymethylcellulose 1-10 and 1-10 carbon nanotubes, drying is carried out at a temperature of from 20 to 150°C, as the final stage carry out the pyrolysis of carboxymethyl cellulose at temperatures above 250°C.
The introduction of the specified operation allows to form conductive layers on the basis of carbon nanotubes with sufficient reproducibility. By drying to remove the water from the suspension. Conducting pyrolysis of CT is Oxymetazoline allows to increase the conductivity of the layers due to decomposition of organic compounds. When carrying out the claimed process produces a structure of a conductive layer different from the patterns obtained by carrying out the method according to the prototype.
In private cases, the execution of the invention the substrate using metal, ceramics, glass, silicon, silicon oxide, silicon nitride or composition.
In private cases, the execution of the invention the coating suspension onto the substrate is carried out by a method of printing or silkscreen printing.
In private cases, the execution of the invention the drying conduct heat and/or vacuum method.
The set of features that characterize the invention allows to form conductive layers on the basis of carbon nanotubes using carbon nanotubes without functional groups on the surface of CNTS and without the use of conductive polymers.
The invention is illustrated by table comparing the characteristics of the achieved technical result with the result presented in the prototype.
Method of forming a conductive layer on the basis of carbon nanotubes includes the steps of: applying to the substrate a suspension containing the carbon nanotubes and the solution of carboxymethylcellulose in water in the following ratio, wt.%: carboxymethylcellulose 1-10 and 1-10 carbon nanotubes, drying at a temperature of from 20 to 150°C, the pyrolysis at a temperature of either the 250°C.
For the formation of the conductive layer based on carbon nanotubes form a solution of carboxymethyl cellulose (CMC) in water by adding 6 wt.% CMC in water and mixing the components by mechanical means with a magnetic stirrer for 60 minutes, adding 5 wt.% CNTS to the solution and mixing the suspension with ultrasound exposure for 90 min, applying the slurry on a substrate by screen printing, the solvent (water) from the suspension at a temperature of 90°C at a pressure of 10 kPa for 20 min, conducting pyrolysis of organic compounds at a temperature of 300°C at a pressure of 10 kPa for 25 minutes
The conductivity of the obtained conductive layer on the basis of CNT is equal to 50000 Cm/m In the table presents a comparison of the achieved results with the prototype. The result shows that pyrolysis of organic compounds can improve the conductivity of the material without conducting functionalization of CNTS and the use of conductive polymers.
For the formation of the conductive layer based on carbon nanotubes form a solution of CMC in water by adding 6 wt.% CMC in water and mixing the components by mechanical means with a magnetic stirrer for 60 minutes, adding 5 wt.% CNTS to the solution and stirring su is pensii using ultrasonic treatment for 90 min, applying the suspension to the substrate by screen printing, the solvent (water) from the suspension at a temperature of 90°C at a pressure of 10 kPa for 20 min, followed by pyrolysis of organic compounds at a temperature of 200°C at a pressure of 10 kPa for 25 minutes
The conductivity of the obtained conductive layer on the basis of CNT is equal to 1000 Cm/m the result shows that at 200°C, which is 50°C less than the temperature of the beginning of the pyrolysis CMC, there is no decomposition of organic compounds and the conductivity of the material is still low.
|Comparative characteristics of the achieved technical result with the result presented in the prototype.|
|The properties of the nanomaterial||Invention||The placeholder|
|The concentration of carbon nanotubes, wt.%||5||5|
|Form||Three-dimensional, any configuration||Nita is ignoe fiber|
1. Method of forming a conductive layer based on carbon nanotubes, comprising applying to the substrate a suspension containing the carbon nanotubes and the solution of carboxymethylcellulose in water in the following ratio, wt.%: carboxymethylcellulose 1-10 and 1-10 carbon nanotubes, drying at a temperature of from 20 to 150°C, the pyrolysis at temperatures above 250°C.
2. The method according to claim 1, characterized in that the substrate using metal, ceramics, glass, silicon, silicon oxide, silicon nitride or composition.
3. The method according to claim 1, characterized in that the coating suspension onto the substrate is carried out by a method of printing or silkscreen printing.
4. The method according to claim 1, characterized in that the drying conduct heat and/or vacuum means.
FIELD: process engineering.
SUBSTANCE: invention relates to moulding articles from thermoplastic binder and loose materials. Method comprises feed of activator bulk in portions sufficient for forming of separate activator. Bulk portion is compacted and formed around cylinder-shape central electrode by vibrations in stiff conducting shell. Compaction and forming is performed, first, in vertical forming pipe. Then, it is made in the shell continuously formed by winding conducting paper on forming pipe and pulling therefrom by displacement of formed activator cylinder. Formed activator in said shell is cooled to solidification of only bulk surface layer, Then anode grounder is held in vertical position to full solidification of activator, outside the device. Proposed device comprises bulk mixing and heating assembly, assembly for feeding said bulk to forming pipe by portions, sealing and forming assembly, shell orbital winding mechanism, refrigerator, system for control and permanent feed rate drive.
EFFECT: higher efficiency of forming, simplified design, lower labour input.
2 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to super disperse deposition of metal lithium powder or thin lithium foil of substrate without solvents. Proposed method comprises deposition of metal lithium powder or thin lithium film of carrier. Said carrier is brought in contact with substrate of higher affinity to metal lithium powder compared with that of carrier to said powder. Said substrate in contact with carrier is subjected to conditions sufficient for transfer of deposited powder or film on said substrate. Carrier and substrate are separated to preserve said powder of film deposited on said substrate.
EFFECT: ruled out reduction in lithium cell charge capacity.
12 cl, 2 dwg, 9 ex, 1 tbl
SUBSTANCE: in a creation method of porous material, on electrically conducting metal carrier there formed for the purpose of increasing specific surface and porosity is a catalytic active layer on metal carrier by means of high-energy processes of gas-phase transfer, and namely by microplasma or cold gas-dynamic sputtering of composite powder mixture consisting of metal powder-base and pore agent; with that, the obtained coating as a result of sputtering is subject to heat treatment at the temperature of decomposition of pore agent into solid-phase and steam-gas components; as a result, gaseous component is removed through the coating, thus forming through pores, and solid-phase component is deposited on walls of pores, thus considerably increasing an integral specific coating surface.
EFFECT: production of high-efficiency porous material on metal carrier with high specific surface and porosity.
8 cl, 3 tbl
SUBSTANCE: electrode includes a conducting current collector having a resin layer and an active material layer, which is formed on the current collector. Active material layer includes an active material layer of positive electrode on one side of the conducting current collector and active material layer of negative electrode on opposite side of the conducting current collector. Resin layer of current collector is connected by means of connection through thermal fusion to active material layer.
EFFECT: invention allows improving adhesion between current collector and active material layer and reducing resistance of contact between them.
20 cl, 10 dwg
FIELD: electrical engineering.
SUBSTANCE: result is achieved due to increase in homogeneity of electrode active mass and increase of lithium diffusion coefficient; for this purpose in the suggested method active mass is mixed with electroconductive additive, the received mass is saturated with solution of polymer electrolyte, cathode mass is dried and grinded in ball crusher and press-fitted to current tap; at that after drying cathode mass is treated additionally in plastic yield process at torsion under pressure of at least 1.7 GPa and relative strain of 22-24.
EFFECT: improvement of technological effectiveness in cathode manufacturing process with increase of its discharge capacity.
1 dwg, 5 ex
SUBSTANCE: disclosed anode contains, wt %: magnesium 5-6, scandium 0.17-0.25, zirconium 0.05-0.12, beryllium 0.0001-0.005, copper 0.01-0.05, manganese 0.25-0.4, and inevitable impurities, including not more than 0.15 wt % iron and not more than 0.1 wt % silicon, having a structure which consists of grains of a solid solution having an elongated shape and thickness of 1-10 mcm, inclusions of aluminium-scandium-zirconium and aluminium-manganese-iron intermetallic phases and magnesium-silicon phases with size of 2-10 mcm and dispersed particles of the aluminium-scandium-zirconium phase with size of 2-10 nm. The disclosed method of making an anode of said composition involves melting an ingot of an alloy in form of a solid solution based on aluminium, with grain size and size of 30-90 mcm, with inclusion of intermetallic phases, homogenising annealing of the ingot, pressing the ingot into a strip, annealing the strip, straightening the strip by stretching and cutting an anode of given size.
EFFECT: use of the disclosed anode in an alkali-stannate electrolyte enables to reduce polarisation losses and increase maximum load current.
2 cl, 1 tbl, 6 dwg
SUBSTANCE: invention can be used to produce cathode materials with an olivine structure for lithium self-contained power generation (hybrid transport, electric cars, buffer systems for energy storage etc). The method involves mixing a lithium salt Li2CO3, iron (III) oxide Fe2O3, citric acid and ammonium dihydrophosphate in stoichiometric ratio. Particles of the mixture are ground in ball mill in acetone medium and subsequent heat treatment is carried out at temperature of 350°C-650°C.
EFFECT: invention increases specific capacity and stability during cycling.
SUBSTANCE: thin-film material is formed from nanosize clusters of silicon in a shell of silicon dioxide, which are produced in a single stage by magnetron sputtering of a silicon target in plasma containing argon and controlled additives of oxygen. The specified nanostructured films are produced in the plasma of the magnetron discharge, containing 1-3% of oxygen by volume in argon. Content of the silicon dioxide in the film is within 16-41 wt %, and the nanostructured silicon in the shell of silicon dioxide has a cluster structure with cluster size of 5-15 nm.
EFFECT: increased specific capacitance and higher coulomb efficiency of negative electrodes in processes of charging and discharging in lithium-ion accumulators.
SUBSTANCE: invention relates to disinfectant compositions and specifically to a highly stable acidic aqueous solution, a method and apparatus for production thereof. The solution is prepared using a fluid medium treatment apparatus having at least one chamber (7), at least one anode (4) and at least one cathode (3) inside the chamber (7). The anode (4) and the cathode (3) are at least in part made from a first metallic material. At least one of said at least one cathode (3) and anode (4) have a coating with nanoparticles (5) of one or more metals.
EFFECT: obtained electrolytic acid water has high stability of its disinfecting action for a relatively long period of time, has low cost of production and is easy to produce.
16 cl, 5 dwg, 10 tbl, 8 ex
SUBSTANCE: in the proposed method the sections of an electrode material containing a dissolvent are distanced from each other on a metal foil. An induction coil that provides for induction heating of the metal foil faces the metal foil. The amount of heat supplied to a non-coated section of the metal foil between the sections of the electrode material is reduced below the amount of heat supplied to the coated section of the metal foil, where the electrode material sections are arranged. Heating evaporates the dissolvent at the sections of the electrode material, making the metal foil release heat due to induction heating as the metal foil and the induction coil move relative to each other, in direction of location, i.e. in direction, where the sections of the electrode material are placed.
EFFECT: improved quality of the electrode material is the technical result of the invention.
16 cl, 25 dwg
SUBSTANCE: claimed is a nanoporous matrix structure, representing a substrate from an anodised aluminium oxide (AAO), which is used to create a pseudocapacitor with high density of accumulated energy. A pseudocapacitive material is conformally deposited on the side walls of the AAO substrate by an atomic layer deposition, chemical deposition from a vapour phase and/or electrochemical deposition with application of a nucleation layer. Thickness of the pseudocapacitive material on the walls can be accurately regulated in the process of deposition. The AAO is subjected to etching to form a body of cylindrical and structurally stable nanotubes from the pseudocapacitive material with cavities made in them. As the AAO substrate, acting as a bearing framework, is removed, and the only active pseudocapacitive material remains, energy per weight unit is brought to the maximum. In addition, the nanotubes can be separated from the substrate, and in order to obtain the pseudocapasitor electrode, the freely located nanotubes with randomised orientation can be deposited on the conducting substrate.
EFFECT: improvement of construction.
24 cl, 20 dwg
SUBSTANCE: invention refers to the field of electric engineering and to a method of electrochemical capacitors operation. The suggested method includes connection of a capacitor to a current source, its charge up to the preset voltage, cassation of charge, and discharge, at that the temperature of the capacitor is measured preliminarily and against this temperature the maximum operating voltage of the charge excluding gas release is defined, and a calculation is made of the maximum charging voltage Umax, which is limited as per the formula Umax=k·t+b, where k and b are coefficients determined experimentally and depending on peculiarities of the capacitor design, t is the temperature, at that current of floating charge is calculated to measure coefficients k and b.
EFFECT: invention allows increase in the capacitor power and service life at operational safety ensured by optimisation of its charging conditions, which is recognised as a technical result of the invention.
2 dwg, 1 tbl, 2 ex
SUBSTANCE: invention relates to electrical engineering, particularly to manufacturing of electrochemical capacitors. A nanocomposite electrochemical capacitor consists of two or more electrodes, electrolytes, separators and current collectors placed in the temperature-controlled space; at that each pair of electrode and electrolyte is represented as nanocomposite made of nanocarbon material and solid ionic organic or inorganic compound of eutectic composition, at that electrodes are made of nanocarbon material with specific area more than 1300 m2/g in the form plates or sheets with thickness of 0.1-10 mm and density of 0.8-1.2 g/cm3. The method of capacitor manufacturing includes dispersion of the prepared electrode mixture with binding agent; moulding of plates or sheets out of dispersed electrode mixture with binding agent, annealing of moulded plates or sheets in oxidising and/or deoxidising atmosphere or under vacuum and impregnation of compacted electrodes in fused bath or electrolyte solution at high temperature and under vacuum with further cooling.
EFFECT: improved specific energy capacity of the claimed capacitor is the technical result of this invention.
20 cl, 6 dwg
SUBSTANCE: invention relates to a method of producing composite material for a supercapacitor electrode, involving synthesis of electroconductive polymers or substituted derivatives thereof during oxidative polymerisation of corresponding monomers on the surface of carbon materials. The environmentally acceptable method involves conducting polymerisation in the presence of laccase enzyme, acidic dopants, an oxidant and an enzymatic reaction redox mediator, dissolved in the reaction mixture.
EFFECT: improved method.
10 cl, 4 ex
SUBSTANCE: invention relates to a method of producing particles of a solid electrolyte Li1+xAlxTi2.x(PO4)3 (0.1≤x≤0.5), which involves mixing a first solution containing nitric acid, water, lithium nitrate, aluminium nitrate, ammonium phosphate NH4H2PO4 or phosphoric acid, and a second solution containing a titanium compound and a solvent, to form a collective nitrate solution, heating the collective solution to obtain a precursor and calcination thereof. The solvent used in the second solution is hydrogen peroxide and the titanium compound is a titanium peroxide complex; nitric acid is further added to the second solution to keep pH of the collective solution not higher than 2; the collective solution is heated at 150-170°C to decompose the titanium peroxide complex and obtain an amorphous precursor, and the precursor is calcined at 600-800°C. The method enables to synthesise electrolyte particles with size of 215-280 nm, and the solid electrolyte obtained from said particles is monophase and has ion conductivity of up to 6.3·10-4 S/cm at room temperature.
EFFECT: method has low power consumption and high environmental friendliness.
3 cl, 3 ex
SUBSTANCE: supercapacitor has least two juxtaposed complexes (1, 2) spaced by a distance d, and at least one common complex (3) opposite the two juxtaposed complexes (1, 2) and spaced therefrom by at least one spacer (4), the spacer (4) and the complexes (1, 2, 3) being spirally wound together to form a coiled element.
EFFECT: reduced system resistance and high available power per unit volume, longer service life of the disclosed complex.
27 cl, 15 dwg, 1 tbl
SUBSTANCE: present invention relates to a supercapacitor with a double electrochemical layer having at least two complexes (2, 3) and at least one spacer (4) in between, the complexes (2, 3) and the spacer (4) being spirally wound together to form a coiled member (10). According to the invention, the supercapacitor further comprises at least another complex (1) and at least another spacer (4), the other complex (1) and the other spacer (4) being spirally wound together around the coiled member (10) to form at least one subsequent coiled member (20), the consecutive coiled members (10, 20) being separated by an electrically insulating space.
EFFECT: low resistance between two series-connected links of the supercapacitor, high volume and mass density of energy.
27 cl, 15 dwg, 1 tbl
FIELD: electrical engineering.
SUBSTANCE: lead-acid battery and electrochemical supercapacitor remain within the same body and are electrically connected. The hybrid device includes at least one non-polarisable positive electrode, at least one non-polarisable negative electrode and at least one polarisable negative electrode with a double electric layer. Between the electrodes separators are positioned, the separators and the electrodes impregnated with sulphuric acid electrolyte.
EFFECT: invention allows power characteristics increase.
3 cl, 13 dwg
SUBSTANCE: electrodes with a double electric layer (DEL) are based on non-metal conducting materials, including porous carbon materials. Conductivity of P-type and high concentration of holes in materials of the electrode may be provided by thermal, ion or electrolytic alloying with acceptor admixtures; by radiation with high-energy quick particles or quanta; or chemical, electrolytic and/or thermal treatment. This invention makes it possible to increase specific energy, capacitance and power parameters, and also to reduce cost of various electrochemical capacitors with DEL. The proposed electrodes with DEL may be used as positive and/or negative electrodes of symmetrical and asymmetrical electrolytic capacitors with aqueous and non-aqueous electrolytes.
EFFECT: high specific energy, capacitance and power parameters of electrolytic capacitors.
22 cl, 9 dwg
SUBSTANCE: method of making a cathode plate from manganese dioxide involves applying a multilayer cathode coating on an oxidised slug and involves repeated steps of saturating the anode with manganese nitrate solution, followed by pyrolytic decomposition of the manganese nitrate to manganese dioxide at high temperatures and moulding after every few deposited layers, wherein during saturation, air is removed from the anode pores by pre-evacuation and/or slow immersion of the anode into the saturating solution, followed by ultrasonic treatment of the saturated anode.
EFFECT: making a cathode plate of good quality from fewer layers of manganese dioxide and enables to obtain a solid-electrolyte capacitor with improved electrical properties while cutting the process cycle and reducing material consumption.
4 cl, 4 tbl, 20 ex
SUBSTANCE: this invention relates to an electroconductive heat release material. The above specified electroconductive heat release material comprises a substrate and an electroconductive heat release layer, practically evenly applied on the above substrate. The above electroconductive heat release layer is formed from electroconductive heat release paint, which includes an electroconductive heat release material and a binder. The specified above electroconductive basic material is selected from the group including natural graphite, artificial graphite or electroconductive carbon soot; the specified above binder is selected from the group, which includes acrylic resin, epoxide resin, polyurethane, melamine, gelatin, carboxymethylcellulose and polyvinyl alcohol. In some versions of realisation the substrate is paper. The above specified electroconductive material may be used to make a laminate floor cover with electric heating, surface temperature of which may be increased to 15-70°C for 5 minutes as power is supplied from a source with voltage of 220 V, at the same time this temperature may be maintained permanent within the long period of time.
EFFECT: laminate floor cover with electric heating may be used instead of existing systems of "warm floor", it is reliable, safe, power-saving, simple to repair and replace and also cost-effective.
14 cl, 9 dwg