40results about How to "Improve the electrochemical reaction speed" patented technology

The preparation method of high aspect ratio titanium dioxide nanotube array. It uses new electrolyte that contains fluorin. By electrochemistry anodization method, it coats high aspect ratio TiO2 nanotube array on surface of metal titanium. The substrate is polished and cleaned. The solute of electrolyte is fluorid and supporting electrolyte, then adds alcohol additives. According to the weight %, the content of fluorid is 0.1% - 1% of total electrolyte; the content of supporting electrolyte is 0.4% - 4% of total electrolyte; the content of alcohol additives is 0% - 90% of total electrolyte, the remains are solvent. The metal plate can be used as electrode to anodizate. Then high aspect ratio TiO2 nanotube array film can be generated on surface of substrate.

The invention discloses an electrolytic tank and application for an electrochemical reduction reaction of carbon dioxide. The electrolytic tank comprises a cathode chamber, an anode chamber and a gas-liquid separator, wherein the cathode chamber is divided into an upper cavity and a lower cavity; the lower cavity is a container with an open upper end, and the upper cavity is a container with an open lower end; the upper cavity is disposed above the lower cavity; first flange plates are disposed at the opening ends of the two cavities respectively; the two cavities are connected through the first flange plates. Compared with a traditional H-type electrolytic tank, the electrolytic tank can remarkably increase the converting rate of the carbon dioxide and improve electrochemical reaction speed and is easy to operate, and the calculation is convenient.

The invention discloses a thermal management system of an electric automobile, comprising a temperature sensor, a heating and cooling device and a central processing unit, wherein the temperature sensor is used for acquiring the temperature of components generating the raising and the drop of temperature in the electric automobile; the heating and cooling device is used for generating a heat source and a cold source which are transmitted to components needing heating and cooling and is connected with the signal output end of the central processing unit through a control switch; and the central processing unit is used for receiving a signal of the temperature sensor and calculating and outputting the control signal to the heating and cooling device. In the invention, the temperature conditions of various components can be detected by using the temperature sensor and are transmitted to the central processing unit which controls the temperature in time so as to ensure that the temperatures of various components are in a proper range. The system not only can be used for monitoring the temperature of batteries, but also can be used for monitoring the temperature of a motor and a motor controller, thereby avoiding the motor and the motor controller from being damaged due to overhigh temperature. The system can also be used for monitoring the temperature in a carriage and ensures thecomfort degree of the moving space of people.

The invention discloses a method for preparing a titanium alloy bionic coating through compounding of laser and anodic oxidation. The method comprises the following steps: placing titanium alloy subjected to laser pretreatment in absolute ethyl alcohol or acetone for ultrasonic cleaning for 5-10 min; taking out and thoroughly rinsing the titanium alloy with distilled water; placing the rinsed titanium alloy in an alkaline degreasing solution for soaking, and then taking out the soaked titanium alloy; sequentially washing the soaked titanium alloy with running hot water and running cold water; placing the washed titanium alloy in an anodic oxidation solution; and by taking stainless steel as the cathode, performing anodic oxidation treatment for 60-90 min to obtain the titanium alloy with a bionic coating. Compared with a traditional anodic oxidation method, the method provided by the invention has the advantages that before anodic oxidation, pollution-free laser is adopted to pre-process the surface of the titanium alloy, so that the surface microstructure of the titanium alloy can be adjusted more easily; besides, the anodic oxidation adopts the main ingredient of malic acid while such strong-acidity substances as hydrofluoric acid, sulfuric acid and nitric acid are not used in the whole process, high safety and no toxicity are achieved, and pollution to the environment and harms to a human body are reduced to the minimum; the bioactivity, the wear resistance and the corrosion resistance of the material are greatly improved, and the service life of an implant is prolonged.

The invention discloses a power lithium battery temperature control device, which comprises a temperature control battery holder, wherein the temperature control battery holder forms a circulation loop with a high and low temperature liquid source through a pipe; the circulation loop is provided with a circulating pump; and a temperature sensor and a control unit are connected between the circulating pump and the temperature control battery holder. In the invention, the temperature sensor detects in real time and the control unit regulates in time, thereby providing a suitable work environment temperature for a lithium battery, improving the electrochemical reaction speed, and ensuring the output current and voltage and discharge capacity of the lithium battery so as to enable the lithiumbattery to achieve the optimal property and meet the utilization requirement of a power source.

The invention relates to a lithium sulfur battery positive electrode material and a preparation method thereof. The method comprises the steps of preparing a mixed solution of N, N-dimethylformamide,methyl alcohol and phthalic acid, adding tetrabutyl titanate by ultrasonic dispersion, placing in a reaction kettle with a polytetrafluoroethylene lining, and performing reaction under 120-150 DEG C to prepare a metal organic framework material MIL-125(Ti); placing the MIL-125(Ti) in a cobalt acetate solution, performing high-temperature calcination under an argon atmosphere to obtain Co3O4/TiO2/Ccomposite material after centrifugal separation; and performing thermal processing under nitrogen protection to obtain S-Co3O4/TiO2/C composite material after ball-milling and mixing with pure-phasenanometer sulfur powder. By the material, Co3O4/TiO2/C is organically combined, and a shuttle effect of a polysulfide can be limited by absorption of carbon material pores; and the dissolving of an intermediate product is prevented by an absorption effect and a catalytic effect, the electrochemical reaction speed of an active material absorbed onto a carrier surface is improved, and the capacity and the cycle property of Li-S battery are improved.

The invention discloses an aluminum alloy metallographic corrosion method and a metallographic corrosive agent thereof. The metallographic corrosion method comprises the following steps that a, a 7055 aluminum alloy sample is subjected to pre-cleaning, hot inlaying, mechanical grinding and mechanical polishing treatment, washed with clear water and blow-dried, and then a metallographic sample is obtained; b, sequentially adding nitric acid, hydrochloric acid, sulfuric acid, hydrofluoric acid and deionized water into a container, and mixing to obtain a metallographic corrosive agent, wherein the metallographic corrosive agent comprises the following components in percentage by volume: 4-5% of nitric acid, 2-3% of hydrochloric acid, 1.5-2.5% of sulfuric acid, 2.5-3.5% of hydrofluoric acid and the balance of deionized water; and c, pouring the metallographic corrosive into a culture dish, placing the culture dish in a constant-temperature environment of 22-28 DEG C, immersing the metallographic sample into the metallographic corrosive, corroding for 25-35 seconds, taking out, washing, drying, and observing. The corrosion method is simple, the corrosion time is short, the effect of the metallographic corrosive agent is fully exerted, and the crystal boundary and crystal grains of the 7055 aluminum alloy are clearly displayed.

The invention relates to a fuel cell technology, and aims to provide preparation of a monatomic palladium catalyst and application of the monatomic palladium catalyst in a direct formic acid fuel cell. The preparation method comprises the following steps of: preparing an o-phenylenediamine cyclodextrin inclusion compound from o-phenylenediamine and [beta]-cyclodextrin, adding the o-phenylenediamine cyclodextrin inclusion compound into a chloropalladic acid solution, and performing stirring to obtain a palladium coordinated o-phenylenediamine cyclodextrin inclusion compound solution; adding sodium chloride, carrying out liquid nitrogen flash freezing, and performing drying to obtain a precursor; carbonizing the precursor under the protection of nitrogen atmosphere, performing cooling, washing and drying to obtain the monatomic palladium catalyst. The technical route is simple, universality is achieved, and generation of impure phases can be avoided. The monatomic palladium catalyst hashigher electrocatalytic activity, and the cost can be effectively reduced. The co-catalytic application of the monatomic palladium catalyst and the cocatalyst (VO)SO4 provides a new thought for the design and performance improvement of the direct formic acid fuel cell, and is beneficial to the commercial development of the fuel cell.

The invention discloses a temperature control device for a power lithium battery. The temperature control device comprises a temperature controlled battery box communicated with a high-temperature liquid source and a low-temperature liquid source to form a circulation loop via pipelines, wherein a circulating pump is arranged on the circulation loop; a temperature sensor and a control unit are connected between the circulating pump and the temperature controlled battery box; and the high-temperature liquid source, as well as the low-temperature liquid source, comprises a temperature controlled liquid box with both a liquid inlet and a liquid outlet, a radiator is arranged above the temperature controlled liquid box, a metal plate is arranged between the temperature controlled liquid box and the radiator, and semiconductor temperature difference modules are respectively arranged between the metal plate and the temperature controlled liquid box, as well as between the metal plate and the radiator, and are electrically connected with a DC power supply after being coupled with each other. Through real-time detection of the temperature sensor and in-time regulation and control of the control unit, an appropriate work environment temperature can be provided for the lithium battery, the electrochemical reaction speed is increased, and the output current, the output voltage and the discharge capacity of the lithium battery are ensured to enable the lithium battery to play the optimal performance and satisfy the utilization request of the power supply.

Provided is a fuel cell system in which a plurality of electricity generating units each including a unit cell in which an anode electrode and a cathode electrode are formed on both sides of an electrolyte film to use an electrochemical reaction of a fuel and an oxidizing agent to generate an electrical energy and a pair of separating plates which are disposed on both surfaces of the unit cell and have passages through which a fuel and an oxidizing agent are supplied to the anode electrode and the cathode electrode are laminated in which the electricity generating unit has a structure where a fuel flowing direction and/or a flowing direction of the fuel or the oxidizing agent are different between neighboring electricity generating units.

This invention discloses a quickly charged long life accumulator including a battery tank made of insulation materials and positive, negative pole plates of multiraw baffles arranged in gaps in the electrolyte and a collelcting bar collecting the pole plates and binding post extending out of the battery cover, the key is to take light metal or compount material as the two pole plates to matrix frame, two sidesurfaces are plated with two layers of coating of active substances, the electrolyte is compound electrolyte with additives enabling huge increases of micro pore rate on the pole plates and quickly penetrates and enters inside to contact with reacted active substances. It can be quickly charged by large current.

The invention relates to a method for preparing an ultra-small oxide and carbon compounded lithium battery negative electrode material by a microwave method. The invention belongs to the field of preparation of lithium ion battery negative electrode materials. The invention aims to solve the technical problems that the existing lithium ion battery is low in comprehensive performance such as capacity and conductivity, the preparation process is relatively complicated, and the cost is relatively high. The method comprises the following steps: 1, preparing a salt solution to enable metal ions to permeate into a metal-organic framework (MOF) material; separating the ion-permeated MOF material from the solution by suction filtration, and drying to obtain an ion-permeated MOF material; 2, mixing the ion-permeated MOF material and graphene, grinding, and then carrying out microwave short-time heating; and 3, washing and removing impurities from the product to obtain the ultra-small oxide and carbon compounded lithium battery negative electrode material. The nano-particle size of the product is 2-10nm, and the product can have high capacity under low oxide loading.

The invention relates to a fuel cell technology and aims to provide a direct formic acid fuel cell with vanadium sulfate oxide homogeneous assisted catalysis. The preparation method for modified formic acid fuel in the fuel cell comprises the following steps of: heating one liter of concentrated sulfuric acid with a mass concentration of 98 wt% to 70-90 DEG C, adding 0.1-1 mol of NH4VO3 and conducting stirring and reacting for 5 h, after cooling to room temperature, adding 1-4 liters of formic acid aqueous solution with a mass concentration of 30-60 wt% to obtain modified formic acid fuel containing a (VO)SO4 cocatalyst. (VO)SO4 is added into the formic acid solution to play a co-catalytic role, dehydration reaction of formic acid on a solid catalyst is prevented, and catalyst poisoning iseffectively avoided. The cocatalyst exists in the formic acid solution, is not restricted by the supported area of the solid catalyst, can play the role of the cocatalyst to the maximum extent and does not reduce the supported amount of the main catalyst on the solid carrier. The active center is homogeneous and has high activity, and the electrochemical reaction speed of the formic acid is greatly improved. A new idea is provided for design and performance improvement of direct formic acid fuel cells.