68results about How to "Help with transmission" patented technology

The invention discloses a flexible low-voltage organic field effect transistor and a manufacturing method thereof. Three layers of polymers are added between a gate and a semiconductor layer interface to serve as an insulated layer; the overall device comprises a source and drain electrode, a semiconductor, a high-insulation polymer, a high-dielectric constant material polymer, a high-insulation polymer, a gate, and a flexible transparent plastic substrate sequentially from top to bottom; and the dielectric layer with the structure has excellent insulation and good stability. Through measuring electrical properties and a semiconductor particle growth shape, whether the device is a flexible low-voltage organic field effect transistor can be judged. The organic field effect transistor has the advantages of realizing high mobility and large switch ratio under low voltage, maintaining good performance when bias voltage is applied and in a high temperature condition, and having good stability features in different bending modes.

The invention relates to a cathode material of a lithium battery and a preparation method thereof. A Ni-ZIF-67@CC/CNTS nanometer composite material is prepared by carrying out a chemical vapor deposition on a long carbon nanotube on cloth C. The Ni-ZIF-67@CC/CNTS nanometer composite material prepared by using a chemical vapor deposition method has a fuzzy porous structure, is used for lithium battery cathodes and is conducive to lithium ion transporting; moreover, the porous structure is more easier to carry sulfur; the electrochemical performance of the cathode material of the lithium batteryis obviously improved; the fade of discharge capacity in the circulation process is very small; the battery capacity and the circulation stability of a lithium ion battery are effectively improved; polysulfide is very well adsorbed; and the shuttle effect of the polysulfide is suppressed.

The invention discloses a large-mode-field fiber pumped coupler and a manufacturing method thereof. The coupler comprises a main fiber and a pumped fiber bundle containing a plurality of pumped fibers, wherein the hollow fiber bundle is defined by a plurality of pumped fibers; one end of the main fiber is provided with a transition zone which exposes an inner cladding and is inserted into a hollow part of the pumped fiber bundle; the corresponding part of the pumped fibers and the transition zone of the main fiber is a tapering end which exposes a cladding; and the cladding of the tapering end of the pumped fibers is in close contact with and integrally fused with the inner cladding of the transition zone of the main fiber. The manufacturing method comprises the following steps of: preprocessing a plurality of pumped fibers to form the hollow fiber bundle, and cutting at an appropriate position; reducing or not reducing the diameter of the inner cladding of the main fiber; inserting the preprocessed main fiber into the hollow pumped fiber bundle to ensure that the main fiber is in close fit with the fiber bundle; and integrally fusing the main fiber with the fiber bundle, and recoating the main fiber. On the premise of not damaging a fiber core structure of the large-mode-field main fiber, signal coupling efficiency is improved.

The invention relates to a method and equipment for realizing remote education by utilizing AR. A pair of AR glasses is connected with a remote terminal control system through a wireless communication module in a remote signal manner, so that images which can be seen by a teacher on the AR glasses can be transmitted to the remote terminal control system positioned out of a teaching site in real time, and students can see teaching contents, which can be seen by the teacher, personally at home. Compared with the existing remote education manner, the method has better reality, so that students can have better sense of substitution in learning and attention can be better improved; and furthermore, the teacher can conduct dynamic interaction with students on the AR glasses and can easily mark key points for students without the need of smearing and drawing on the true teaching contents, the operation is simple, the observation feeling is not influenced, and the teacher can clearly find the question where the students point out and can make pointed reference for the position, so that the teaching effect can be greatly enhanced.

The invention discloses a preparation device and method for a metal lithium composite negative electrode. The device comprises a heating container, a roller machine and a nitrogen reaction container,wherein a graphite electrode is arranged inside the heating container, the graphite electrode and the heating container are correspondingly connected with an external power supply through wires, the heating container is connected with the roller machine through a pipeline, and the nitrogen reaction container is arranged at the tail end of the roller machine. Cycling performance of a composite metal lithium alloy negative electrode material prepared by the preparation device and method is remarkably improved, meanwhile, generation of lithium dendrites is inhibited, and the safety of a battery is greatly improved.

The invention discloses an oxygen reduction catalyst based on nitrogen-doped graphene aerogel and a preparation method therefor. The oxygen reduction catalyst is mainly a graphene aerogel with a gradient pore structure, and the aerogel contains a nitrogen-containing functional group. The preparation method comprises the following steps of adding ammonia water into a graphene hydrogel to freeze dry, so that the graphene aerogel is obtained, and further treating the graphene aerogel with high-temperature ammonia gas, nitrogen element is heavily doped after two steps, so that the nitrogen-doped graphene aerogel is synthesized. The graphene aerogel provided by the preparation method has a developed pore structure and contributes to the transport of reactants such as oxygen, hydrogen ions and water. According to the oxygen reduction catalyst based on nitrogen-doped graphene aerogel and the preparation method therefor, the nitrogen-containing functional group is further introduced into the aerogel by means of a high-temperature ammonia gas treatment, so that conductivity and catalytic activity of the catalyst are improved. Compared with a traditional platinum-based catalyst, the nitrogen-doped graphene aerogel has comparable ORR catalytic performance, the cost is greatly reduced, and good application prospects are achieved.

The invention discloses a nanometer porous zinc electrode for electrochemical reduction of carbon dioxide, and a preparation method and application thereof. The nanometer porous zinc electrode is composed of a substrate layer, a Zn electrodeposited layer on the outer surface of the substrate layer and a Zn catalyst nanolayer formed on the surface of the Zn electrodeposited layer, wherein the Zn catalyst nanolayer of the electrode is composed of Zn nanoparticles with particle sizes of 1 to 300 nm; the Zn catalyst nanolayer of the electrode contains pore channels with diameters of 1 to 300 nm and has porosity of 2 to 15%; the Zn electrodeposited layer has a thickness of 500 nm to 0.05 mm; and the Zn catalyst nanolayer has a thickness of 100 to 500 nm. According to the invention, the Zn nanoparticles with abundant marginal active sites are prepared through electrodeposition on a substrate, heat treatment and electrochemical reduction, so the electrode has substantially improved specific surface area and active area and is enhanced in Faraday efficiency in electrochemical reduction of carbon dioxide into formic acid.

The invention discloses a triphenylamine organic dye and a synthesis method thereof. The chemical structure of the triphenylamine organic dye is as shown in a general formula (1). In the formula (1),R<1> is selected from hydrogen or styryl, R<2> is selected from hydrogen or styryl, and the following structure is a quinoxaline derivative. The triphenylamine organic dye provided by the invention has a long conjugated D-pi-A structure, and meanwhile, molecules contain cyano groups and carboxyl, and the electrondrawing group is cyanoacetic acid. The triphenylamine organic dye can be used as a solar cell sensitizer, and has a good application prospect in dye-sensitized solar cells.

The invention provides a gel polymer battery. The battery comprises a positive electrode, a negative electrode and a gel polymer electrolyte, the positive electrode is made of a material of which thevoltage is greater than 3.5 V, the negative electrode is metal lithium, the gel polymer electrolyte is of a layered structure and comprises an ether gel polymer electrolyte layer and a carbonic estergel polymer electrolyte layer, the ether gel polymer electrolyte layer is close to one side of the negative electrode, and the carbonic ester polymer electrolyte layer is close to one side of the positive electrode. The gel polymer electrolyte contains ether and carbonate gel electrolytes at the same time, so that the gel polymer electrolyte can be used in a battery system of which the negative electrode is made of metal lithium and the positive electrode is made of a high-voltage material, the energy density of the battery is greatly improved, and the safety performance of the battery is alsogreatly improved due to the use of the gel polymer electrolyte.

The invention relates to an intelligent constant-temperature fresh-keeping control device and a control method. The intelligent constant-temperature fresh-keeping control device comprises a computer and a storage cabinet; a plurality of fresh-keeping cabins are formed in each storage drawer, and the fresh-keeping cabins are provided with infrared emission heads, infrared receiving heads, air outlets and air inlets. The infrared emission heads emit infrared light into the fresh-keeping cabins, the infrared receiving heads receive the infrared light reflected by food stored in the fresh-keepingcabins and transmit the infrared light to an infrared spectrometer through optical fibers, the infrared spectrometer transmits a collected infrared spectrum to the computer, the computer inputs the infrared spectrum into a discrimination model stored in the computer, and the types of the food in the fresh-keeping cabins, the appropriate storage temperature and the maximum fresh-keeping time are judged according to the infrared spectrum; by combining with the analysis function of the infrared spectrum, the types of the food, the real-time temperature, the appropriate storage temperature and theremaining maximum fresh-keeping time are identified simultaneously; and the fresh-keeping cabins are each formed into an ellipsoid shape, circulation of an air circulating system is facilitated, thusthe temperature in the fresh-keeping cabins is uniform, fresh-keeping of the food is facilitated, all the fresh-keeping cabins are operated independently, and using is easy and convenient.

The invention discloses a Si-Sn composite material used for a Li-ion battery anode and a preparation method thereof. The composite anode material is of a Sn-fiber-wound Si particle composite structure and composed of two elements Si and Sn, wherein the Si content is 20-70at.% and the balance is Sn. According to the preparation method of the composite anode material, Si and Sn powder are mixed and the mixed powder is ball milled by using a high-energy ball milling method in an argon atmosphere; under the action of high-energy impact, metal Sn particles deform seriously, are subjected to cold welding and torn to form Sn fibers; through further ball milling, fiber-structured ductile-phase metal Sn formed after high-energy ball milling and Si particles smashed under high-energy impact in the ball milling process are composited to form a Sn-fiber-wound Si particle composite structure. The novel Sn-fiber-wound Si composite material is simple in preparation process and low in cost; in addition, the composite material is novel and unique in structure and excellent in electrochemical performance and therefore has excellent application prospect.

The invention relates to a production line and a process for recycling waste granite powder. The production line comprises a double-shaft beater, a straight-cylinder drying machine, a composite crusher, a vibrating screen, a plurality of storage silos and a stirring and packaging machine. A discharge outlet of the double-shaft beater is connected with a feed inlet of the straight-cylinder drying machine through a conveying belt. The composite crusher is arranged below a discharge outlet of the straight-cylinder drying machine. A discharge outlet of the composite crusher is connected with the vibrating screen through a lifter. The vibrating screen is connected with the storage silos through a wind pressure transfer device. The storage silos are connected with the stirring and packaging machine through a spiral conveyor. The process includes beating, drying, crushing, screening, mixing and packaging. The production line and the process provided by the invention have the advantages that the problems of environmental pollution caused by discharge of the substantial waste granite powder can be solved, powdery building materials can be produced, and production cost is reduced at the sametime.

The invention relates to a lithium supplementing material and a preparation method thereof, a negative electrode and a lithium ion battery, the lithium supplementing material comprises metal lithium particles and a conductive material, the conductive material comprises a built-in section embedded in the metal lithium particles and an exposed section located outside the metal lithium particles; and the electronic conductivity of the conductive material is greater than 100s/cm. The lithium supplementing material disclosed by the invention can realize electron conduction between the lithium metal particles and the negative electrode active material through the conductive material, increases an electron conduction channel, is beneficial to lithium ion transmission, realizes a rapid embedding process of lithium ions, and remarkably improves the lithium supplementing efficiency, so that formation of dead lithium is effectively inhibited, and potential safety hazards caused by the fact that dendritic crystals pierce a diaphragm are avoided.

The invention relates to a weak light image stochastic resonance reconstruction method and device based on cross modulation instability, which solves the technical problems of discrete intensity modulation and image detail loss in the existing single path stochastic resonance reconstruction method. The method and the device combine the scattered image signal beam and the coherence-controllable noise beam to propagate in a nonlinear crystal, and generate mode coupling and phase modulation by adding a coherence-controllable noise beam. The additional noise beam changes the spatial frequency composition of the scattered signal beam and provides enough energy for nonlinear coupling so that the intensity distribution of the reconstructed enhanced weak-light image is uniform and more high-frequency details are presented.

The invention discloses a preparation method and application of a three-dimensional porous carbon material with high specific surface area and adjustable pore size distribution. The preparation methodof the three-dimensional porous carbon material comprises the following steps: (1) preparing a saturated aqueous solution of sodium chloride, then adding saccharides, nitrogen-containing organic matters and nano-calcium carbonate, and fully and uniformly dispersing to obtain a dispersion; (2) carrying out freeze drying on the obtained dispersion; (3) putting the freeze-dried sample into a tubularfurnace, and carrying out two-stage carbonization in a protective atmosphere to obtain a template-containing carbon material 1; (4) removing a template in the carbon material 1 to obtain a carbon material 2; (5) mixing and grinding the carbon material 2 and an activating agent, and roasting the carbon material 2 in a tubular furnace under a protective atmosphere to obtain a carbon material 3; and(6) removing the activating agent in the carbon material 3 to obtain the three-dimensional porous carbon material with high specific surface area. The invention provides application of the prepared three-dimensional porous carbon material as a negative electrode material of a lead-carbon battery, and the three-dimensional porous carbon material shows excellent capacitance performance and cyclingstability.

The invention aims to provide a preparation method of potassium carbonate chemically-activated low-order carbon source-based porous carbon, which has the advantages of developed pores, relatively highgraphitization degree, simple preparation process and obvious graphitization structure, and can be applied to the field of electrochemical energy storage such as electrode materials of electric double-layer supercapacitors. The preparation method of the potassium carbonate chemically-activated low-order carbon source-based porous carbon comprises the following steps: a low-order carbon source isprocessed into powder, and drying is conducted; 2-5 parts by weight of potassium carbonate is dissolved in water, a potassium carbonate solution is obtained, then 1 part by weight of the powdery low-order carbon source obtained in the step A is added into the potassium carbonate solution, and the potassium carbonate solution mixed with the powdery low-order carbon source is placed in a stirrer tobe stirred evenly, and a mixture is obtained. The mixture obtained in the step B is placed in an atmosphere furnace filled with nitrogen or argon, heating is conducted by the atmosphere furnace at a rate of 3-20 DEG C/min, and the atmosphere furnace heats to 900-1300 DEG C.