230results about How to "Promotes electrochemical reactions" patented technology

The invention provides a method and a device for coaxial combined machining with tubular electrode discharging and laser irradiation, and belongs to the field of non-traditional machining and combined machining. Micro-etching machining is performed on the surface of an insulating high-hardness brittle material by virtue of a coaxial action of cone-shaped tube electrode discharging and laser irradiation, recessive material defects and stress concentration generated by pulsed laser acting on the surface of a workpiece can attract spark discharge to always act on the current area, and meanwhile, the spark discharge changes the surface shape and physico-chemical property of the current area, then nonlinear absorption of the current area on laser energy is improved, a local field enhancement effect is generated, and pulsed laser focused irradiation can accelerate an electrochemical reaction to promote generation of a stable discharge gas film layer on the surface of a hollow tool electrode; and the interactive cooperation of two types of energy achieves fixed-area micro-etching of the insulating high-hardness brittle material, the machining efficiency is significantly improved, and the machining quality is improved.

The invention discloses lead storage battery positive pole material and a production method thereof, ingredients of the material and percent contents of the ingredients by weight are as follows: 0.2-2% of carbon nanometer tube, 0.2-2% of polyacrylonitrile short fiber, 60-90% of PbO2, the rest is lead powder. The carbon nanometer tube experiencing mixed-acid ultrasonic treatment is used as an additive for the lead storage battery positive pole, which can not only resist corrosion from the execrable electrochemical environment in the lead storage battery, increase specific surface area of the positive pole active substances, promote charging and discharging abilities of an electrode, improve the circulation performance, boost chemical efficiency, but advance the utilization rate of the active substances and discharging capacity of the lead storage battery. In case of 0.5c-10c of current, the utilization rate of the active substances in simulation batteries can be enhanced by 8%-15%. The invention has simple process and low cost as well as adapt to large-scale production and application.

The present invention relates to electric and biological processing apparatus and method for waste water containing heavy meal ion and non-degradable organism. The apparatus includes electric and biological reaction tower with top air outlet, bottom air distributor, liquid inlet in the upper part, liquid outlet in the lower part and connected with precipitator, tower wall and tower core constituting one electrode pair and insulating layer outside the tower wall. The present invention has the advantages of multi-dimensional electrode reinforced electric field to promote the electrochemical reaction and directional motion of heavy metal ion, and catalytic electrode/efficient functional microbe group with coupled reaction to degrade organic waste water. The present invention can treat waste water containing heavy meal ion and non-degradable organism effectively.

The invention relates to a functional separator for a lithium sulfur battery, and a preparation method and application thereof, belonging to the technical field of electrochemistry. The functional separator of the invention is composed of a polymer separator matrix and a functional modification layer applied one side surface of the polymer separator matrix, wherein the functional modification layer comprises a binder, a conductive carbon material and a dendritic branched macromolecule. The adhesive of the invention has good adhesion and high stability. The conductive carbon material has a veryhigh electron conduction rate, can improve the utilization rate of the active substance and greatly reduce the internal impedance of the battery. The dendritic branch macromolecule contains more organic functional groups, the dendritic branched macromolecule has chemisorption to the polysulfide generated in the sulfur positive electrode region during the cycle, and the carbon material has physical adsorption to the dissolve polysulfide, thereby effectively inhibiting the shuttle effect in the lithium-sulfur battery. Therefore, the lithium sulfur battery prepared using the functional separatordescribed in the present invention exhibits excellent cycle performance and rate performance.

The invention provides a device and method for processing a semiconductor material through backward multifocal lasers and electrochemistry in a combined manner. The energy, frequency and wavelength of the lasers are regulated, and a multifocal laser beam acts on the back face of a semiconductor sample; on one hand, when the lasers radiate the back face of the semiconductor sample, a large amount of light can be stimulated in the semiconductor sample to generate holes, the holes move to the position of the surface of the polished semiconductor sample to participate in the electrochemistry reaction, and material corrosion removal is achieved; and on the other hand, on the back face of the semiconductor sample, the multifocal lasers gradually conduct processing inwards. A work electrode is a cathode, the semiconductor sample is used as an anode, and when the potential between the two electrodes is high, spark discharge processing is conducted; and when the potential is low, electrochemistry erosion removal is conducted. The multifocal lasers and electrochemistry act on the semiconductor sample in the combined manner, the corrosion efficiency is improved, and the surface quality of through holes is improved. When the high-precision micro-through-holes are processed in the semiconductor material, the combination effect is good in action effect, and the device and the method are suitable for precise processing.

A composite positive electrode of a lithium sulfur battery is formed by combining a diaphragm layer, a porous carbon layer and a carbon sulfur compound, wherein the porous carbon layer is arranged on one side of the diaphragm layer, and the carbon sulfur compound is arranged on the porous carbon layer. The preparation method comprises the following steps of adding the porous carbon, a conductive agent and an adhesive into an organic solvent to prepare paste, applying the paste onto one side of a diaphragm, and forming a porous carbon layer compound on one surface of the diaphragm layer; and adding the carbon sulfur compound, the conductive agent and the adhesive into the organic solvent to prepare paste, and applying the paste onto the porous carbon layer in the compound to obtain the composite positive electrode of the lithium sulfur battery. The lithium sulfur battery disclosed by the invention comprises the composite positive electrode of the lithium sulfur battery, a negative electrode and an electrolyte. By the lithium sulfur battery, the interface resistance can be reduced, the ionic conductivity and electron conductivity are improved, and the energy density, the cycle performance and the rate performance of the lithium sulfur battery are effectively improved.

The invention provides a flexible thin-film electrode, which comprises an ultrathin porous carbon nitride nanosheet and a carbon nanotube, wherein manganese oxide is loaded on the ultrathin porous carbon nitride nanosheet as an electroactive material; due to the ultrathin porous carbon nitride nanosheet, the flexible thin-film electrode has a multi-channel structure; and the carbon nanotube is taken as a conductive support and is also taken as a mechanical support, so that the flexible thin-film electrode has a three-dimensional conductive network structure. The invention further provides a preparation method and an application of the flexible thin-film electrode. The method provided by the invention is simple in operation and low in cost. A thin film prepared by the method has the three-dimensional conductive network structure and the multi-channel structure, has good flexibility and excellent electrochemical property, and can be widely used for a high-efficiency energy storage device.

The invention relates to a pollution-free molten slag deoxidization method capable of adjusting anode oxygen partial pressure and a device thereof, and belongs to the technical field of metallurgical refining process. In the method, molten steel or molten metal is deoxidized and purified by the special device. In the method, the molten slag is taken as electrolyte, a deaeration cavity electrode inserted into the molten slag is taken as an anode, and the molten steel or the molten metal is taken as a cathode; the deaeration electrode is provided with an electrode cavity and is communicated with a vacuum chamber by a conduit; an applied DC power supply exerts direct current impulse voltage so that an electric field is formed between the molten steel or the molten metal and an oxygen electrode of the molten slag, and the conduction of oxygen ions in a molten slag system and mass transfer of dissolved oxygen in the molten steel are controlled by controlling a current value and a voltage value of the DC power supply as well as components of the molten slag. The oxygen is diffused from the molten slag to the electrode cavity and discharged by an air exhaust system by controlling the oxygen partial pressure of the electrode cavity.

Methods for generating electric power and a discharge fluid from an oxidant and a reducer using a discharge system, and regenerating an oxidant and/or the reducer from the discharge fluid using a regeneration system are provided. A discharge unit of the discharge system generates electric power and the discharge fluid by transferring electrons from a positive electrode of a 5-layer electrolyte-electrode assembly (5EEA) to an aqueous multi-electron oxidant (AMO) and from a reducer to a negative electrode of the 5EEA. The regeneration system neutralizes the discharge fluid to produce a salt form of the discharge fluid. The regeneration system electrolyzes the salt form of the discharge fluid into an intermediate oxidant in an electrolysis-disproportionation reactor and releases the reducer, while producing the AMO by disproportionating the intermediate oxidant. The regeneration system converts a salt form of the AMO into an acid form of the AMO in an ion exchange reactor.

The present invention discloses an anode material of lead-acid battery, the components and weight percentage content are: 0.2-2% of carbon nano-tube, 0.2-2% of polyacrylonitrile short fiber, 60-90% of PbO2, others is ceruse. Graphitized process carbon nano-tube as anode additive, not only resists rigor corruption of electrochemical circumstance in lead-acid battery, adds specific surface area of anode active material, enhance charge and discharge capability of electrode, improves circle capability, enhances formation efficiency, but also improve the utilization rate of active material and discharging capacity of lead-acid battery. In the conditions of 0.5c-10c current, the utilization rate of active material can be improved of 15-25%. The present invention has simple technique, low cost and is suitable for large-scare production and application.

The invention relates to an oily sewage ultrasonic magneto-electric flocculation suspension filtering purifying process, and is an oily sewage medication-free purifying treatment process in combination of ultrasonic, a tubular magneto-electric flocculator and an air flotation suspended sludge filtering. The flocculation treatment is firstly performed on the oily sewage through the tubular magneto-electric flocculator, the ultrasonic device is acted on the magneto-electric flocculator, and then then treated oily sewage enters the suspended sludge filtering device, the purified water is extracted by using a lifting pump through a buffer tank. The ultrasonic, the magnetic treatment, the electric flocculation, the sterilization, the air flotation and the suspended sludge filtering are combined to prevent the electrode from scaling and passivating and prevent the device from scaling, the process is fast in filter layer formation, strong in adaptability, flexible and stable in operation, free from chemical agent in whole process, and suitable for various suspension-containing sewage treatment, and especially suitable for the oily sewage treatment.

The invention discloses a method for producing a composite porous material containing metal-carbon-nitrogen. The method comprises the following steps: a compound containing metal M and an organic ligand compound raw material are mixed, or respectively dissolved in a solvent, wherein, the metal M is transition metal or a transition metal mixture from a periodic table of elements, the organic ligand compound at least contains nitrogen and carbon, the solvent at least comprises at least one of compounds containing a general formula of CxHyOmNnSz, wherein x, y, z, m and n are integer, x is greater than or equal to 0, y is greater than or equal to 0, m is greater than or equal to 0, n is greater than or equal to 0, z is greater than or equal to 0, and all of x, y, z, m and n cannot represent 0; the raw materials are added in the solvent and are uniformly mixed, or the raw materials are respectively dissolved in the solvent and the raw material solutions are uniformly mixed, after a synthesis reaction, the products are separated, washed, and dried to obtain the composite porous material containing metal-carbon-nitrogen. The composite porous material has high capacity, excellent multiplying power performance, excellent cycling stability, and good low-temperature performance.

The invention relates to the technical field of supercapacitor materials, and in particular relates to a hollow core-shell structure supercapacitor material Fe-Co-S/NF as well as a preparation methodand an application thereof. The method comprises the following steps of 1) preparing a cobalt source, an organic ligand and a solvent into a reaction solution, and soaking nickel foam in the reactionsolution to react to obtain Co-MOF/NF; 2) enabling the Co-MOF/NF to be soaked in a ferrous sulfate water solution, after completing, then taking out Co-MOF/NF and performing drying to obtain LDH@Co-MOF/NF; and (3) enabling a sulfur source, the solvent and the LDH@Co-MOF/NF to be reacted in a sealing condition, and drying the reaction product after the reaction is ended, so as to obtain the product. According to the preparation method disclosed by the invention, the cobalt-based MOF grows on the foamed nickel to serve as a template for in-situ synthesis of a Fe-Co-S electrode material with ultra-high-performance; and when the electrode material is used for constructing a high-performance supercapacitor self-supporting electrode material, super-high mass specific capacitance is shown.

The invention belongs to the technical field of material chemistry, particularly discloses a preparation method of a sodium ion battery negative electrode material of zinc-cobalt bimetal sulfide, andsynthesizes a ZnS@CoS2@C heterostructure by a simple and convenient method so as to enhance electrochemical property of the sodium ion battery. The method comprises steps that ZnO precursor is synthesized; the ZnS@CoS2@C is obtained by growing a layer of Co-MOF structure on the surface through performing hydrothermal vulcanization and calcining in an Ar atmosphere, and the ZnS@CoS2@C has a uniformheterogeneous interface structure, so the ion diffusion kinetics is improved, electron conductivity is improved, and electrochemical performance of the sodium ion battery is further improved. Compared with pure ZnS, the ZnS@CoS2@C heterostructure is utilized as SIB of a negative electrode, so the specific capacity can be remarkably improved, and excellent cycling stability and rate performance are shown.

The invention protects a formation process for a high-energy-density flexibly-packaged power lithium-ion battery. The process comprises the steps that liquid is injected into a cell, the cell stands,pre-edge-sealing is performed, and the cell is vertically placed into a pressure fixture; the surface of the cell is pressurized, a certain temperature is set, primary charging is performed on the cell, and pressure, temperature and charging currents are set in a stepped mode; after charging is completed, primary second-sealing is performed, and meanwhile air is pumped while a certain vacuum degree is maintained; and standing, secondary pressurization, normal-temperature charging and secondary second-sealing are performed. According to the formation process, the high-temperature pressurizationformation process is adopted, and compared with normal-temperature normal-pressure formation, sufficient wettability of an electrolyte and an anode/cathode active material is improved, and an electrochemical reaction is benefited; in the last step of primary formation, formation pressure is raised, formation temperature is lowered, the uniformity, compactness and stability of an SEI film generated on the surface of a cathode are improved, generation of a thick interface film is avoided, and internal resistance is lowered; and capacity performance of the cell is enhanced.

The invention discloses a preparation method of an FeS/RGO nano composite sodium-ion battery negative electrode material. The preparation method comprises the following steps: dissolving oxidized graphene into deionized water to prepare a solution, and carrying out ultrasonic treatment to obtain a turbid liquid in which the oxidized graphene is dispersed uniformly; adding ferric acetylacetonate into acetone, carrying out ultrasonic treatment until the ferric acetylacetonate is dissolved, and then adding the solution into the turbid liquid to obtain a mixed solution of ferric salt and the oxidized graphene; heating and evaporating the mixed solution of ferric salt and the oxidized graphene until the acetone is completely evaporated, and carrying out heating vulcanization after freeze drying. According to the preparation method, the oxidized graphene is creatively introduced into the battery negative electrode material, through the control in the heating vulcanization process, the crystallization behavior of transition metal sulfide is changed, namely generated ferric sulfide particles or sheets are stably anchored on the oxidized graphene layer through heating vulcanization to form a novel composite structure, volume expansion of sodium ions in insertion and extraction process is relieved, the pulverization of the material is inhibited, and the cycling stability is improved.

The invention relates to a preparation method of a porous metal doped lithium manganate/graphene lithium battery positive electrode material. The method includes the steps that 1, a sol-gel method is adopted for preparing a precursor of porous LiM0.2Mn1.8O4, and the precursor is put into a muffle furnace to be calcined at constant temperature to obtain porous LiM0.2Mn1.8O4; 2, graphene oxide is taken and added into deionized water to prepare a graphene oxide solution with the mass concentration of 0.05-0.1 g/mL; 3, porous LiM0.2Mn1.8O4 is put into the graphene oxide solution, the mixture is subjected to magnetic stirring, ultrasonic dispersion and drying and then transferred into a tube furnace to be calcined at constant temperature, and the porous metal doped lithium manganate/graphene lithium battery positive electrode material is obtained. Compared with the prior art, the preparation method is simple, and the raw materials are easy to get; the prepared material is good in crystallinity and uniform in particle size, and the size is about 30 nm; serving as a lithium battery positive electrode material, the prepared material is good in electrochemical stability, high in specific discharge capacity and good in rate performance and cycle performance.

The invention belongs to the technical field of sodium ion batteries and particularly relates to a sodium ion battery negative electrode material and a preparation method thereof. The negative electrode material is an iron-based selenide FeSe2@C. The negative electrode material has a controllably synthesized hollow core-shell structure and stable morphology, high specific surface area can be provided for electrolyte contact, the diffusion length of sodium ions can be shortened, and the expansion of the material can be inhibited in the charging and discharging process. According to the materialand the method in the invention, volume expansion of the sodium ion battery negative electrode material prepared in the prior art in the charging and discharging process is overcome, the stability performance of the battery is effectively improved, and the cycling performance and the coulombic efficiency of the sodium ion battery are improved.