38 results about "Standard electrode potential" patented technology

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.

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.

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.

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

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.

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.

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.

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 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.

The present invention provides a metal composite material in which metal particles are supported on a carbon material, wherein crystal grains containing a metal element constitute at least a part of the surface of the metal particles.SOLUTION: A metallic composite material comprising a metallic material and metallic particles supported on the metallic material, wherein the metallic particles comprise nuclei containing two or more metallic elements and grains containing one or more metallic elements, the metallic elements contained in the grains are metallic elements having standard electrode potentials (25 °C., 1atm) higher than 0V and not higher than 50V, and the grains constitute at least part of the surfaces of the metallic particles.SELECTED DRAWING: Figure 1

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 as a main component, and the second inner electrodes have a second metal composition including 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.

The present application relates to the technical field of all-solid-state ion selective electrode, in particular to a kind of all-solid-state ion selective electrode instrument-free standard potential calibration method, more specifically to use short-circuit electrode short-circuit all-solid-state ion selective electrode, to adjust or unify the standard electrode potential of all-solid-state ion selective electrode, maintain the original Nernst slope calibration curve of all-solid-state ion selective electrode, and the position of calibration curve can be controlled by changing the concentration of short-circuit electrode electrolyte;Wherein, the short-circuit electrode includes any one of Ag / AgCl / 3MKCl reference electrode and Ag / AgCl QRE quasi-reference electrode;The all-solid-state ion selective electrode includes electrode base, solid connection layer modified on the surface of electrode base and ion selective membrane layer modified on the surface of solid connection layer.The present application uses short-circuit electrode short-circuit all-solid-state ion selective electrode, which provides the possibility for all-solid-state ion selective electrode instrument-free standard potential calibration, greatly simplifies the calibration and unification of all-solid-state ion selective electrode.

The invention relates to a positive electrode composite material, a preparation method thereof, a positive electrode layer and an all-solid-state lithium battery. The positive electrode composite material comprises positive electrode active particles, an inner coating layer and an outer coating layer, wherein the inner coating layer and the outer coating layer are sequentially attached to the surfaces of the positive electrode active particles; the inner coating layer and the outer coating layer respectively contain a fast ion conductor material; the standard electrode potential of the inner coating layer is 3.6-3.9 V, the elastic modulus of the inner coating layer is less than 20 GPa, and the ionic conductivity of the inner coating layer is more than 10 <-3 > S / cm; the standard electrode potential of the outer coating layer is 2.6-3V, and the ionic conductivity of the outer coating layer is 10 <-4 > S / cm or above. The positive electrode composite material disclosed by the invention can effectively block side reaction between the positive electrode active particles and the solid electrolyte, reduce interface impedance, improve the capacity development degree of the positive electrode active particles, slow down capacity fading and improve the cycle performance of the solid-state battery.

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 Ni as a main component, and the second inner electrodes have a second metal composition including Ni as a main component, and at least one metal element selected from Au, Pt, Ir, Pd, Os, Ag, Rh, Ru, and Cu, which have standard electrode potentials higher than that of Ni, as an additive component.

This application provides a method for the targeted reduction and resource recycling of platinum in waste liquid. A weak reducing agent with a standard electrode potential between 0 and 0.7 V is slowly added dropwise to the solution to be treated. The solution is stirred while maintaining the pH value between 1 and 3 at an environment of 30℃-60℃. 4+ Directional reduction to Pt 2+ A first reducing solution is formed; the first reducing solution is introduced into the adsorption device of the chelating resin, whereby the chelating resin can selectively adsorb Pt. 2+ This process forms a platinum-supported resin; the platinum-supported resin is then desorbed to obtain a Pt-rich product. 2+ The second reducing solution is adjusted to a pH between 4 and 6, and then a reducing agent is added to reduce Pt. 2+ The above method precipitates elemental platinum by selecting a weak reducing agent and under mild reducing conditions. 4+ Directional reduction to Pt 2+ Further Pt 2+ This method reduces the substance to elemental Pt, avoiding the problem of increased impurities in the solution caused by the reducing agent itself transforming into metal ions, as is common in active metal displacement methods.

The metal material contains a nucleus containing two or more kinds of metal elements and crystal grains containing one or more kinds of metal elements, and the metal elements contained in the crystal grains constitute at least a part of the surface of metal particles.SOLUTION: The metallic material contains nuclei containing two or more kinds of metallic elements and crystalline grains containing one or more kinds of metallic elements, wherein the metallic elements contained in the crystalline grains are metallic elements having standard electrode potentials (25 °C, 1atm) higher than 0V and equal to or lower than 50V, and the crystalline grains constitute at least a part of the surfaces of metallic particles.SELECTED DRAWING: Figure 1

Disclosed is a method for treating reverse extract liquid. This method utilizes the difference of the standard electrode potentials of various metals. Firstly, copper is recovered through cyclone electrolysis. At the same time, the chlorine gas generated by the electrolysis can remove TOC and avoid contaminating subsequent extractants. Then, zinc is separated using zinc precipitation reagents, and finally, manganese and calcium are separated using saponified Cyanex272 extractant to obtain manganese sulfate. The method of the present application is capable of graded recovery of valuable metals such as manganese, copper, zinc and the like. The purity of the recovered manganese sulfate reaches battery-grade. Compared to recovering copper in the form of copper sulfide, the sponge copper obtained in the present application has a purity greater than 98%, which has better application prospects and economic benefits. Moreover, by selectively abandoning sodium, calcium, and aluminum with low recovery value, the operation process can be simplified, unnecessary auxiliary material input can be reduced, and higher economic value can be achieved; at the same time, the method of the present application does not generate solid waste and has good environmental performance. Drawing of Abstract

An Mn-M binary multi-phase alloy has Mn content satisfying 39 wt %≤Mn≤78 wt %, with the balance including metal M. The standard electrode potential of the metal M is higher than the standard electrode potential of Mn, and an αMn phase, a γM-Mn phase, and a γ′Mn-M phase are distributed in the binary metal multi-phase alloy. A method for preparing the Mn-M binary multi-phase alloy, a use thereof in preparation of a porous material, a current collector including the porous material, a secondary battery, and an electrical device.

This utility model relates to the field of vehicle technology and discloses a battery box and carrier, including: a box body made of magnesium alloy; and a transition connector disposed on the box body for connecting to the carrier body. The standard electrode potential 'a' of the box body material is less than the standard electrode potential 'b' of the transition connector material, and the standard electrode potential 'b' of the transition connector material is less than the standard electrode potential 'c' of the carrier body material. By setting the transition connector on the box body, and the standard electrode potential of the transition connector being between the standard electrode potentials of the box body and the carrier body, a connection method of box body-transition connector-carrier body is formed, avoiding direct contact between the box body and the carrier body. This splits the high potential difference between the box body and the carrier body into two smaller potential differences, effectively reducing the potential difference at the interface and preventing damage to the magnesium alloy box body due to electrochemical corrosion.

The invention belongs to the technical field of electrocatalyst materials, and provides a high-entropy alloy electrode, a high-entropy alloy comprises at least five of Fe, Co, Ni, Mo, W, Mn and Ir, and a preparation method of the high-entropy alloy electrode comprises the following steps: S1, preparing an electrodeposition solution; s2, adjusting the pH value of the solution in the step S1, and aging at room temperature; s3, the original titanium felt is taken to be subjected to five-step pretreatment procedures of acid pickling, water washing, alcohol washing, water washing and vacuum drying; s4, putting the electrode substrate in the step S3 into the prepared electro-deposition solution, regulating electro-deposition parameters, and then carrying out electro-deposition to obtain a high-entropy alloy electrode material; and S5, pre-oxidizing and annealing the electrode material obtained in the step S4 to obtain the final high-entropy alloy electrode material. According to the method, the deposition rate of the metal elements in the electro-deposition process is regulated and controlled by controlling the concentration of the metal salt in the electro-deposition solution and electro-deposition parameters, and therefore the problem that common and relatively uniform deposition cannot be achieved due to the fact that the potential differences of standard electrodes of different metal elements are large is solved.