136 results about "Electrochemical potential" patented technology

A cluster or array of reference electrode materials is prepared and used to monitor the state of charge of positive and negative active electrode materials of a lithium-ion cell. The reference electrode materials are composed so as to provide useful electrochemical potential values when placed in the same electrolyte in proximity with a positive or negative electrode. The array of reference electrodes includes at least two electrically discrete instances of reference electrode materials. Such duplication of reference material in the array permits confirmation of the present quality and activity of a reference material used for evaluation of positive and/or negative electrode material in a lithium-ion cell.

An electrically addressable release pad for use in a burst electrode drug release (delivery) system. The pad useable in this system comprises a polymer, preferably polypyrrole, which surrounds medicine. Once a section of the polymer receives an electrochemical potential sent from an electrode contained within the pad, a defined dose of medicine contained therein is released. The pad is designed to be worn by a patient, so that when the medication is released, its administered to the patient, without the patient having to do anything. The electrode typically can be a burst electrode, one with a unique electrical signature. The electrode can be triggered from a remote source.

The invention belongs to the field of a supercapacitor of electrochemical energy storage, and discloses a method for realizing energy density maximization of a supercapacitor, for solving the problem of energy density loss caused by high specific capacity of an electrode material and incapability of giving full play to and fully utilizing an available voltage window of an electrolyte in a conventional supercapacitor. Through an electrochemical process, charges are injected to an electrode material to realize electrochemical potential adjustment, and then the adjusted electrode material is assembled to form the supercapacitor, thus working potential windows of a positive electrode and a negative electrode in a device are optimized, the working voltages and specific capacity of the device are improved at the same time, and the energy density maximization of the supercapacitor is realized.

The invention relates to a method of polishing a substrate comprising at least one metal layer by applying an electrochemical potential between the substrate and at least one electrode in contact with a polishing composition comprising a reducing agent or an oxidizing agent.

The invention relates to biology and medicine, in particular, it can be used in medicine for preparing a pharmacological composition used for accelerated healing of wounds and the damages by means of addressed (directed) delivery of biologically active agents to mitochondria by means electrochemical potential of hydrogen ions contained therein. Said invention can be also used for producing a composition useful in transplantation surgery for preserving transplantation material and for inhibiting rejection. Moreover, the invention can be used for producing a cosmetic agent for improving state of the skin and for the revitalisation and regeneration thereof.

The invention discloses a soil conditioning method capable of reducing cadmium accumulation for paddy rice. The soil conditioning method comprises the following steps of: before ploughing and fertilizing acid soil contaminated by heavy metal cadmium, uniformly spreading a soil conditioner sulfite over the surface of the acid soil contaminated by the heavy metal cadmium, then applying a base fertilizer, and blending sufficiently; and with combination of soil flooding conditioning, making the soil in a flooded state in a rice growth period so as to make the acid soil contaminated by the heavy metal cadmium in a low-electrochemical-potential reducing environment with Eh being (-150mV)-(-300mV), effectively adsorbing the cadmium in the soil by using the generated reduzate, and generating chemical precipitates, thereby completing the soil conditioning process. The soil conditioning method disclosed by the invention is simple and reliable in operation, quick in response after utilization and obvious in economic benefits, and has great significance of controlling the heavy metal cadmium contamination of the soil and guaranteeing the food safety.

The invention discloses a water pollution online analysis and quick source tracing method used for strengthening supervision of wastewater discharged by enterprises in the industries of printing and dyeing, coking, electroplating, electronic manufacturing, papermaking, pharmacy, metal manufacturing and the like. According to the method, a multi-channel laser Raman online analysis and multi-channelelectrochemical online analysis combined technology is adopted to perform online analysis and monitoring on multiple types of pollutants possibly occurring in a monitored water area, and the online analyzed and monitored water pollution data is analyzed automatically by utilizing a pre-constructed pollution source database, source tracing software and a data analysis platform so as to realize online water pollution source tracing. By adopting measures such as multiple test channels, a wide-electrochemical potential window three-dimensional bismuth film alloy electrode, a modulation asymmetricsquare wave test method, a surface enhanced Raman accessory and the like, the test rate, the detection capability and the monitoring resolution capability of online analyzing and testing various types of pollutants are ensured.

A magnesium alloy includes <3% by weight of Zn, ≦0.6% by weight of Ca, with the rest being formed by magnesium containing impurities, which favor electrochemical potential differences and/or promote the formation of intermetallic phases, in a total amount of no more than 0.005% by weight of Fe, Si, Mn, Co, Ni, Cu, Al, Zr and P, wherein the alloy contains elements selected from the group of rare earths with the atomic number 21, 39, 57 to 71 and 89 to 103 in a total amount of no more than 0.002% by weight.

Methods and systems for removing impurities from a molten salt stream are provided. A molten salt stream is provided that comprises a mixture of compounds selected from the group consisting of LiF, BeF₂, and NaF, and ZrF₄. The molten salt stream is flowed through a loop that may contain a precipitation filter, electrochemical potential, and/or a sparger, which thereby remove impurities in the molten salt stream. Various physical methods and apparatus are used to control the ability to remove impurities from the molten salt stream based on temperature, solubility, and general chemistry control.

A magnesium alloy includes 3 to 7.0% Zn, 0.001 to 0.5% Ca, the remainder being magnesium containing impurities, which promote electrochemical potential differences and/or the formation of intermetallic phases, in a total amount of no more than 0.005 of Fe, Si, Mn, Co, Ni, Cu, Al, Zr and P, wherein the alloying elements are selected from the group of the rare earths having the ordinal numbers 21, 39, 57 to 71 and 89 to 103 in a total amount of no more than 0.001% by weight.

The invention discloses a high-energy-density super capacitor and a preparation method thereof, and belongs to the field of electrochemical energy storage. Through introducing a metal lithium electrode in the assembling process of the super capacitor, the electrochemical state of an electrode material is controlled, charges are injected into the electrode material, positive and negative materials for electrochemical potential adjustment are obtained, working potential windows of positive and negative electrodes in the super capacitor are optimized, the working voltage and the specific capacity of the device are simultaneously improved, and the energy density of the super capacitor is improved. At the same time, the obtained capacitor can carry out electrochemical activation process through the metal lithium electrode to stabilize the potential windows so as to enable the super capacitor to have super long cycle life. The super capacitor and the method provided by the invention are simple in technical process, are compatible with a conventional process, and substantially improve the device performance, thereby having quite large application prospect.

The invention relates to a method for cleaning a metallurgical silicon material, which comprises the following steps: crushing a metal silicon material to below 3 centimeters; preparing acid-washing impurity removing solution, and preparing mixed acid by using hydrofluoric acid and nitric acid in a ratio of 1:12-20; soaking the crushed silicon material into the mixed acid, and stirring and cleaning the silicon material for certain time; fishing out the cleaned silicon material, cleaning the silicon material by secondary purified water, and continually turning over the silicon material; and ultrasonically cleaning the silicon material by third-grade purified water, fishing out the cleaned silicon material when the pH is equal to 7, and drying the silicon material. When the silicon material contains impurities, the electrochemical potential energy and the surface activity in an area are changed, the impurities are enriched, the reaction electromotive force of the impurities is large, the reaction rate with the acid is high, then the metal silicon material is subjected to impurity removal to a certain degree by using the principle, and the best selective corrosion effect is realized by allocating the acid matching ratio, concentration and reaction time so as to remove more impurities, realize the selective corrosion effect and meet the usage requirements of solar cells on the silicon material.

The invention relates to a self-electroosmosis hydrogel adhesive film, which combines an electrochemical primary batter consisting of two polar materials with different electrochemical potential difference with functional active substance-containing hydrogel. A method for manufacturing the self-electroosmosis hydrogel adhesive film comprises the following steps of: printing conductive paste on an organic film to form a collector layer; producing a positive electrode layer and a negative electrode layer and printing the positive electrode layer and the negative electrode layer on the collector layer respectively; adhering all the layers on a non-woven fabric substrate; coating a conductive adhesive layer on the two electrodes respectively; and coating a functional active substance-containing hydrogel layer on the conductive adhesive layer. During use, the hydrogel adhesive film is contacted with the skin of a human body, and the two electrodes and the skin of the human body form a current loop through the hydrogel comprising a certain amount of moisture, so that permeation rate of the active substance can be increased and the adsorption rate of the skin on the active substance can be increased. The hydrogel adhesive film has the advantages of overcoming the defects that a power supply needs to be added, the film cannot be used at any time and the cost is high in the conventional ion permeation technique, and effectively increasing the permeation rate of the functional active substance, along with simple structure, low cost, convenient storage and carrying and convenient use.

The invention discloses an organic phase electrolyte and an application thereof in a negative electrode of a redox flow battery. The organic phase electrolyte consists of active materials, a supporting electrolyte and an organic solvent, wherein the active materials are diphenyl ketone and a derivative thereof, anthrone and a derivative thereof, or dibenzoyl methane and a derivative thereof; the supporting electrolyte is selected from tetraethylammonium hexafluorophosphate, tetraethylammonium tetrafluoroborate, tetrabutylammonium hexafluorophosphate or tetrabutylammonium tetrafluoroborate; and the organic solvent is selected from acetonitrile, tetrahydrofuran, propylene carbonate, ethylene carbonate, dimethyl sulfoxide, dimethylformamide, glycol dimethyl ether or ethylene glycol diethyl ether. The organic phase electrolyte disclosed by the invention has relatively low electrochemical potential and high electrochemical property; when the organic phase electrolyte is used as the negative electrode electrolyte of the redox flow battery for assembling an organic phase redox flow battery, relatively high open-circuit voltage can be realized, so that the energy density of the battery can be improved; and meanwhile, the capacity fading of the battery can be lowered, so that the cycle life of the battery can be prolonged.

An electrospray ion source and method of operation includes the application of pulsed voltage to prevent electrolysis of analytes with a low electrochemical potential. The electrospray ion source can include an emitter, a counter electrode, and a power supply. The emitter can include a liquid conduit, a primary working electrode having a liquid contacting surface, and a spray tip, where the liquid conduit and the working electrode are in liquid communication. The counter electrode can be proximate to, but separated from, the spray tip. The power system can supply voltage to the working electrode in the form of a pulse wave, where the pulse wave oscillates between at least an energized voltage and a relaxation voltage. The relaxation duration of the relaxation voltage can range from 1 millisecond to 35 milliseconds. The pulse duration of the energized voltage can be less than 1 millisecond and the frequency of the pulse wave can range from 30 to 800 Hz.

The invention belongs to the technical field of a human body wearable pressure sensor, and discloses a wearable pressure sensor based on a carbon nanotube film and a production method thereof. The pressure sensor comprises a sensing mechanism comprising a sealed box, a porous ceramic plate, a working electrode, a counter electrode and a flexible polymer film, the porous ceramic plate is provided with a groove, and the counter electrode is disposed in the groove; the working electrode is disposed on the porous ceramic plate and covers the groove; the groove is used for accommodating an electrolyte; the flexible polymer film is disposed on the sealed box for sealing the porous ceramic plate, and the working electrode and the counter electrode are sealed in the sealed box; The pressure sensoruses the pressure of the carbon nanotube film to induce the change characteristic of the electrochemical potential to convert the pressure energy to electrical energy, and realizes the real-time monitoring of the pressure to-be-measured. The wearable pressure sensor has good environmental adaptability, can be applied to water environment, and has good accuracy.

An electrochemical process is for recovering a metal element or a metalloid element or a mixture of two or more thereof from at least one water soluble precursor compound containing the metal element or a metalloid element or two or more thereof, in the form of one or more nano particles, in particular nano crystals of at least one reaction product. The process includes supplying the water soluble precursor compound to a water-based catholyte of a cathode compartment of an electrochemical cell, equipped with a cathode containing a gas diffusion electrode, adjusting the pH of the catholyte, supplying at least one oxidant gas to the gas diffusion electrode, and subjecting the cathode to an electrochemical potential to cause reduction of the at least one oxidant gas.

The invention discloses a method for testing activity of a methanol fuel cell anode material. The method is characterized in that the activity of the cell anode material is tested through special quantum chemistry calculation simulation for improving the accuracy of judging the activity and the efficiency of a cell. The method comprises the following steps: firstly, analyzing an adsorption structure, thermodynamics and kinetics parameters of an elementary reaction, and the like by researching the adsorption of the methanol on the surface of the anode material and three broken bond reaction principles of methanol; and secondly, performing comparative analysis on an energy barrier obtained by using calculation, a PDOS (Partial Density Of States) graph and an electrochemical potential to judge the activity of a catalyst. The activity of the methanol fuel cell anode material is conveniently, rapidly and accurately researched by using the method; resources are saved.