68 results about "Standard electrode potential" patented technology

The invention relates to a fluorescent probe for detecting negative electrode lithium precipitation in a lithium ion battery and a detection method, and belongs to the technical field of lithium ion batteries. The fluorescent probe comprises a complex formed by coordination combination of 8-hydroxyquinoline-5-sulfonic acid and metal ions, the complex emits fluorescence under excitation of ultraviolet light, and the standard electrode potential of a metal simple substance corresponding to the metal ions is higher than that of lithium. The fluorescent probe can rapidly, simply and sensitively realize qualitative and quantitative detection of negative electrode lithium precipitation, and compared with large-scale instruments and visual inspection, the fluorescent probe can effectively simplify operation, reduce cost and improve detection efficiency and accuracy, meanwhile, a battery does not need to be disassembled under the condition of full charge, and detection safety is improved.

The invention provides a Mn-M binary multiphase alloy which comprises 39 wt% < = Mn < = 78 wt%, and the balance metal M, wherein the standard electrode potential of the metal M is higher than that of the Mn, and an alpha Mn phase, a gamma M-Mn phase and a gamma 'Mn-M phase are distributed in the binary metal multiphase alloy. In addition, the invention also relates to a preparation method of the Mn-M binary multiphase alloy, application of the Mn-M binary multiphase alloy in preparation of a porous material, and a current collector, a secondary battery and an electric device comprising the porous material.

The invention relates to the technical field of vehicles, and discloses a circuit conduction assembly and a vehicle, the circuit conduction assembly is suitable for being electrically connected with a vehicle body conductive part, the vehicle body conductive part comprises a first element, and the standard electrode potential of the first element is E1; comprising a conductive terminal, the conductive terminal comprises a second element, the standard electrode potential of the second element is E2, and E2 is larger than E1; the insulating part is arranged between the vehicle body conductive part and the conductive terminal in an insulating manner so as to prevent direct contact between the vehicle body conductive part and the conductive terminal; and the conduction piece is connected with the vehicle body conductive part and the conductive terminal and comprises a third element, the standard electrode potential of the third element is E3, and E3 is larger than E1 and smaller than E2. According to the circuit conduction assembly provided by the invention, the conductive part of the vehicle body is isolated from the conductive terminal by using the insulating part, the occurrence of galvanic corrosion is inhibited, the conduction part is used as a bridge of a current path, and the conduction part selects a third element of which the standard electrode potential E3 is between E1 and E2, so that the occurrence probability of galvanic corrosion is reduced.

The invention relates to a rivet nut and a riveting structure, the rivet nut comprises a nut body and a separator, and the separator is used for separating the nut body from a connected plate when the nut body is connected with the connected plate; wherein the standard electrode potential difference between the matrix metal of the nut body material and the matrix metal of the separator material, and the standard electrode potential difference between the matrix metal of the separator material and the matrix metal of the connected plate material; and the standard electrode potential difference is smaller than the standard electrode potential difference between the matrix metal of the nut body material and the matrix metal of the connected plate material. The rivet nut is provided with the isolation piece, the large potential difference generated when the nut body makes direct contact with the connected plate is converted into the small potential difference between the nut body and the isolation piece and the small potential difference between the isolation piece and the connected plate, electrochemical corrosion is shared through the isolation piece, and therefore the reliability of the rivet nut is improved. The corrosion degrees of the nut body, the connected plate and the isolation piece are reduced, and the service life of the rivet nut and the service life of a riveting structure are effectively prolonged.

The application relates to a double-layer polymer film-based rechargeable moisture power generation device and a preparation method thereof, and belongs to the technical field of moisture power generation. The device comprises an active electrode, a double-layer polymer film and an inert porous electrode which are sequentially arranged, wherein the first layer polymer film of the double-layer polymer film is a mixture of iron hydroxide, polystyrene sulfonic acid and polyvinyl alcohol, the second layer polymer film is polydiallyldimethylammonium chloride, the first layer polymer film is in contact with the active electrode, and the second layer polymer film is in contact with the inert porous electrode; the material of the active electrode is a metal with a standard electrode potential of-1V to +0.5V, and the material of the inert porous electrode is a metal with a standard electrode potential greater than +1V. Through moisture evaporation and redox reaction, the battery can generate power spontaneously in a moisture environment, and can be self-repaired through the redox reaction when the performance decreases, so that the charging effect is realized.

A method for determining the presence of chromium-6 (Cr-6) in a solid sample is described, comprising the steps of contacting the solid sample with a destruction liquid under conditions in which the Cr-6 of the solid sample dissolves in the destruction liquid as a chromate, providing a test solution; subjecting the test solution obtained in step (1) to a specific Cr-6 detection reaction, under conditions in which the presence of Cr-6 is detected; and detecting whether the specific Cr-6 reaction occurred in step (2); wherein the destruction liquid comprises an oxidant, which has a standard electrode potential E0 higher than the chromate.

The invention discloses a design method for improving corrosion resistance of a copper-nickel alloy by adding alloy elements. The design method comprises the following steps: screening the alloy elements; the first screening condition is that the solid solubility of the to-be-added alloy element in the copper-nickel alloy is larger than 0.1 wt.%, the second screening condition is that the standard electrode potential of the to-be-added alloy element is smaller than that of Ni, the third screening condition is that the deposition line of the to-be-added alloy element is lower than that of Cu2O, and the fourth screening condition is that the to-be-added alloy element is non-noble metal; based on the screening result, the mass percentage content range of the alloy elements is determined according to the maximum solid solubility of the alloy elements in the copper-nickel alloy; the ratio of the nucleation rate to the growth rate is larger than 104, and the corrosion rate is stabilized to be not higher than 0.02 [mu] m / a along with time, and the mass content of the alloy elements is obtained through optimization; and the final components and content of the added alloy element copper-nickel alloy are determined on the basis of the optimization result, and the corrosion resistance of the alloy element copper-nickel alloy is verified through experiments. The invention provides a design thought for the corrosion-resistant alloy with slowly dissolved main elements.

A method (10) for protecting leadframe, a leadframe composite (20), a box (26) and an outside container (34) are provided. The method (10) includes: step (12), providing a leadframe (22) of a first standard electrode potential; step (14), providing a protection material (24) of a second standard electrode potential, the second standard electrode potential being lower than the first standard electrode potential; and step (16), contacting the protection material (24) with the leadframe (22) so that the protection material (24) acts as a sacrificial anode to protect the leadframe (22) as a cathode from corrosion / oxidization. Embodiments of the present disclosure may help to protect the leadframe (22) without changing the alloying condition of the leadframe (22), without increasing the processing cost of the leadframe (22), etc.

The invention relates to the technical field of water electrolysis and chlor-alkali industry electro-catalysis hydrogen evolution, in particular to a method for preparing a rare earth metal monatomic catalyst through an electrochemical method. The method comprises the following steps: fully dissolving rare earth metal salt in an electrolyte solution; the carrier material is used as a working electrode, a carbon rod is used as a counter electrode, a saturated calomel electrode is used as a reference electrode, one or more rare earth metal salts are dispersed in an electrolyte, and the rare earth metal monatomic catalyst is prepared through one-step electrochemical deposition; or the rare earth metal salt is deposited through an electrochemical method to load the first metal monatomic, and then is loaded with the second metal monatomic or more metal monatomic through a post-deposition method to prepare the composite monatomic catalyst containing the rare earth metal monatomic. According to the method, the rare earth metal monatomic catalyst with extremely low standard electrode potential can be prepared, energy consumption in the preparation process can be reduced, loading and exposure of rare earth metal monatomic on the surface of the carrier can be achieved at the room temperature, and then the rare earth metal monatomic catalyst cooperates with other transition metal monatomic.

A fuel electrode layer (1) of the present disclosure is used in a solid oxide-type electrochemical cell (2). The fuel electrode layer has catalyst material particles (11), solid electrolyte particles (12), and at least one metal M selected from the group consisting of metals having a more negative standard electrode potential than Ni. The catalyst material particles contain Ni as the main component and further contain the metal M. The solid electrolyte particles contain a cerium oxide-based oxide as a main component and further contain the metal M. A solid oxide electrochemical cell (2) according to the present disclosure has, in this order, a fuel electrode layer (1), a solid electrolyte layer (22), and an air electrode layer (23) that is a counter electrode for the fuel electrode layer. The solid electrolyte layer has an electrolyte main body layer (221) in contact with the fuel electrode layer. The electrolyte main body layer contains a ceria-based oxide as a main component, and further contains at least one metal M selected from the group consisting of metals having a standard electrode potential more negative than that of Ni.

The application discloses an antibacterial composite metal coating based on protective area etching and galvanic corrosion and a preparation method and equipment thereof, and the method comprises the following steps: 1) forming a composite coating by vapor depositing a metal transition layer with a standard electrode potential higher than silver, a silver island intermediate layer and electrochemically depositing a silver layer on the surface of a pretreated titanium-based equipment; 2) performing isolation line etching on the outside of the coating area boundary of the equipment surface by laser; 3) preparing a hydrophobic protective coating on the surface of the reserved coating area; 4) filling paraffin in the isolation line groove to form a temporary hole sealing layer; 5) immersing the equipment in an acidic electrolyte to selectively dissolve the coating in the to-be-stripped area in a sectional stripping mode; 6) removing the paraffin in the isolation line groove and performing trimming by laser; and 7) obtaining the coating material after mechanical polishing, cleaning, drying, vacuum packaging and radiation sterilization. The high-strength coating can realize efficient sterilization through the galvanic corrosion effect and prevent coating abrasion during use.

The present application provides a kind of can inhibit life reduction's human-powered vehicle's assembly and gear.The human-powered vehicle's assembly includes: shell;And installation part, it is configured to be provided in shell, is installed in the support portion of human-powered vehicle by fastener, installation part includes: metal base;Metal connecting portion, it is configured to be provided in base and be connected with fastener;And intermediate portion, it is provided between connecting portion and base, base includes the first material with first standard electrode potential, connecting portion includes the second material with second standard electrode potential, intermediate portion is formed by third material or fourth material with electric insulating property, the third material has third standard electrode potential, and the difference between third standard electrode potential and first standard electrode potential and the difference between third standard electrode potential and second standard electrode potential is less than the difference between first standard electrode potential and second standard electrode potential respectively.

To suppress reductive decomposition of a nonaqueous solvent and / or a binder in initial charging of a secondary battery using a nonaqueous electrolyte.SOLUTION: A negative electrode sheet for a secondary battery using a nonaqueous electrolyte solution includes a negative electrode active material, a binder, and an SEI forming agent. A standard electrode potential of the SEI-forming agent is higher than a standard electrode potential of a nonaqueous solvent contained in the nonaqueous electrolyte solution.SELECTED DRAWING: Figure 4

A magnetoresistance memory device includes first, second, third and fourth ferromagnetic layers; a first and second ferromagnetic oxide layers; a metal layer; an insulating layer. The second ferromagnetic layer includes one of iron and cobalt included in the first ferromagnetic oxide layer and one element of a first element group. The second ferromagnetic oxide layer includes an oxide of an alloy of the one of iron and cobalt included in the second ferromagnetic oxide layer with a first element, which has a standard electrode potential lower than that of iron or cobalt and that of the one element of the first element group included in the second ferromagnetic layer.

The invention provides a negative electrode sheet, a secondary battery comprising the negative electrode sheet, and a manufacturing method of the negative electrode sheet. The purpose of the present invention is to suppress reductive decomposition of a non-aqueous solvent and / or a binder in initial charging of a secondary battery using a non-aqueous electrolyte solution. A negative electrode sheet for a secondary battery using a non-aqueous electrolyte solution includes a negative electrode active material, a binder, and an SEI-forming agent. The standard electrode potential of the SEI-forming agent is higher than the standard electrode potential of the non-aqueous solvent contained in the non-aqueous electrolyte solution.

The invention discloses an imaging method of a copper and copper alloy metallographic structure, and belongs to the technical field of metallographic detection. According to the method, a chromium trichloride-hydrochloric acid solution is used as a corrosive agent, and a corrosion time-standard electrode potential value difference value accurate calculation model is constructed. The method comprises the following steps: firstly, determining the standard corrosion time t of a copper standard metallographic specimen, then calculating the standard electrode potential value difference between a copper or copper alloy metallographic specimen to be corroded and the copper standard metallographic specimen, and accurately solving the optimal corrosion time t of the specimen to be corroded through a corrosion time-standard electrode potential value difference calculation formula. The wiping corrosion method is combined with precise corrosion time control, and the problems that in the prior art, a corrosive agent is poor in universality, the corrosion process is difficult to regulate and control, and a sample is prone to oxidation failure can be effectively solved. The metallographic sample prepared by the method is clear and complete in grain boundary, a passivation protection film is formed on the surface, the oxidation resistance is excellent, the stable development effect can be still kept after long-term placement, and the batch detection process is remarkably simplified.

The invention relates to a negative pole piece, an electrochemical device and electronic equipment, and belongs to the technical field of electrochemical energy storage. The negative pole piece comprises a conductive layer and a porous layer arranged on at least one side of the conductive layer, the porous layer comprises a porous material and metal inorganic salt loaded in the porous material, and the standard electrode potential of metal cations in the metal inorganic salt is higher than that of lithium ions. The negative pole piece provided by the invention can effectively inhibit the volume expansion of lithium metal and improve the interface stability, plays a dual role, and can synchronously inhibit the growth of lithium dendrites, improve the cycle performance of a lithium battery and prolong the cycle life of the battery.

An electric discharge machine comprising an electric discharge processing unit that performs electric discharge processing on a workpiece in a processing liquid, and a filter that removes sludge included in the processing liquid, wherein if the workpiece is made of an aluminum-based material, the electric discharge machine performs electric discharge processing using a processing liquid containing positive ions of a metal having a standard electrode potential lower than the standard electrode potential of aluminum.

Disclosed is a method for determination of the presence chromium-6 (Cr-6) in a solid sample, comprising the steps of contacting the solid sample with a destruction liquid under conditions wherein Cr-6 from the solid sample dissolves in the destruction liquid as a chromate, providing a test solution; subjecting the test solution obtained in step (1) to a specific Cr-6 detection reaction, under conditions wherein the presence of Cr-6 is detected; and detecting whether the Cr-6 specific reaction occurred in step (2); wherein the destruction liquid comprises an oxidator, having a higher standard electrode potential E0 than the chromate.

To suppress deterioration in reflection characteristics.SOLUTION: A metasurface reflector comprises: a first metal layer and a second metal layer stacked in a first direction; a dielectric layer provided between the first metal layer and the second metal layer in the first direction; and a protective layer covering the second metal layer. The dielectric layer has a main surface on which the second metal layer is provided. The metasurface reflector is divided into a plurality of unit regions arranged in a second direction along the main surface and in a third direction along the main surface and intersecting the second direction. The second metal layer includes metal units respectively provided in all or some of the plurality of unit regions. The protective layer is made of metal having a standard electrode potential higher than that of the metal constituting the second metal layer. The protective layer includes a first portion covering a top surface of each metal unit and a second portion covering a side surface of each metal unit.SELECTED DRAWING: Figure 4

The present invention provides a fuel electrode layer capable of suppressing degradation due to Ni migration, and a solid oxide type electrochemical cell using this layer. [Solution] The fuel electrode layer 1 is used in a solid oxide type electrochemical cell 2 and has catalyst material particles 11, solid electrolyte particles 12, and at least one metal M selected from metals whose standard electrode potential is more negative than Ni. The catalyst material particles 11 mainly contain Ni and also contain metal M. The solid electrolyte particles 12 mainly contain ceria oxide and also contain metal M. The electrochemical cell 2 has the fuel electrode layer 1, the solid electrolyte layer 22, and the air electrode layer 23 which is an electrode paired with the fuel electrode layer in this order. The solid electrolyte layer 22 has an electrolyte body layer 221 that is in contact with the fuel electrode layer 1. The electrolyte body layer 221 mainly contains ceria oxide and also contains metal M.

The present invention provides an Mn-M binary multi-phase alloy, comprising: 39wt％≤Mn≤78wt％, and the remainder comprising a metal M, wherein the standard electrode potential of the metal M is higher than that of Mn, and an αMn phase, a γM-Mn phase, and a γ'Mn-M phase are distributed in the binary metallic multi-phase alloy. In addition, the present invention further relates to a preparation method for the Mn-M binary multi-phase alloy, a use thereof in preparation of a porous material, a current collector comprising the porous material, a secondary battery, and an electric device.

This invention discloses a water-based treatment agent for improving the corrosion resistance of carbon steel surfaces, comprising the following active ingredients: a compound containing zincate ions, wherein the molar concentration of zincate ions is 0.02–0.6 mol / L; a nonionic polyol surfactant, the content of which is 0.05–0.8 mol / L based on the molar concentration of hydroxyl groups; a metal ion compound, wherein the molar concentration of metal ions is 0.003–0.1 mol / L; the standard electrode potential of the metal ions is in the range of -0.28V to +0.42V; and an inorganic alkali, the content of which is 0.001–0.1 mol / L based on the molar concentration of hydroxide ions. This invention also discloses a carbon steel substrate comprising a carbon steel substrate and a nanoscale coating formed by coating or depositing the aforementioned water-based treatment agent on the surface of the carbon steel substrate.

The invention discloses a heating element, a preparation method, an atomizer and an electronic atomization device. Belongs to the technical field of electronic atomization. The heating element comprises a heating substrate, a lead and a transition layer which are integrally formed; wherein the transition layer is formed between the heating substrate and the lead, and the standard electrode potential of the transition layer is located between the standard electrode potential of the heating substrate and the standard electrode potential of the lead. Wherein the transition layer can be used for dividing the original larger potential difference between the heating substrate and the lead into two smaller potential differences, so that the electromotive force for driving galvanic corrosion of the heating substrate and the lead is reduced, the corrosion condition between the heating substrate and the lead can be delayed, and the service life of the heating element is prolonged; equivalently, the service life of the electronic atomization device is prolonged.

In a multilayer ceramic capacitor including first and second inner electrodes alternately arranged with respect to a stacking direction of a multilayer body, a polarity based on a direction of voltage applied between a first outer electrode and a second outer electrode is determined such that the first inner electrodes function as positive electrodes and the second inner electrodes function as negative electrodes. The first inner electrodes have a first metal composition including Cu and Sn, and the second inner electrodes have a second metal composition including Cu. The second metal composition of the second inner electrodes includes Cu as a main component, and at least one metal element selected from Au, Pt, Ir, Pd, Os, Ag, Rh, and Ru, which have standard electrode potentials higher than that of Cu, as an additive component.

A metasurface reflector includes: a first metal layer and a second metal layer stacked in a first direction; a dielectric layer provided between the first metal layer and the second metal layer in the first direction; and a protective layer covering the second metal layer. The metasurface reflector is divided into unit regions arranged in a second direction along a main surface of the dielectric layer and in a third direction along the main surface and intersecting the second direction. The second metal layer includes metal units respectively provided in all or some of the unit regions. The protective layer is made of a metal having a standard electrode potential higher than that of a metal constituting the second metal layer. The protective layer includes a first portion covering a top surface of each metal unit and a second portion covering a side surface of each metal unit.

A negative electrode sheet for a secondary battery using a non-aqueous electrolyte may include: a negative electrode active material; a binder; and an SEI forming agent. A standard electrode potential of the SEI forming agent may be higher than a standard electrode potential of the non-aqueous solvent included in the non-aqueous electrolyte.

The objective is to provide a microbial fuel cell that can efficiently extract electrical energy from organic fertilizers given to plants, thereby improving power production capacity. [Solution] A microbial fuel cell characterized by comprising an anode electrode which is a metal with a negative standard electrode potential, a cathode electrode which is a carbon material or a metal with a higher standard electrode potential than the anode electrode, and an electrolyte which is an organic fertilizer containing a microorganism that promotes the growth of current-generating bacteria that generate electrons in an anaerobic environment when a voltage is applied.

Provided are: a corrosion-resistant copper alloy which has excellent processability and excellent corrosion resistance over a long period of time against formicary corrosion in the presence of a lower carboxylic acid; a copper alloy tube which uses the corrosion-resistant copper alloy; and a heat exchanger. The present invention relates to a corrosion-resistant copper alloy comprising at least one alloy component selected from metals having a lower standard electrode potential than Al, the remainder comprising Cu and unavoidable impurities, the total content of the alloy components being 0.01 mass% or more and less than 0.5 mass%. In addition, the invention relates to a copper alloy pipe using the corrosion-resistant copper alloy. In addition, the present invention relates to a heat exchanger using the copper alloy tube.

A leadframe (10) comprises: a functional area (12) having a first standard electrode potential; and a non-functional area (14) adjacent to the functional area (12) and including a protective layer, the protective layer (16) having a second standard electrode potential lower than the first standard electrode potential and acting as a sacrificial anode to protect the functional area (12) as a cathode from corrosion / oxidation. Embodiments of the present disclosure may help to protect functions of the leadframe (10) from affections of corrosion / oxidization, etc.