1331 results about "Electro conductivity" patented technology

The invention discloses a high-interface-stability composite solid electrolyte membrane as well as a preparation method and application thereof. The composite solid electrolyte membrane comprises a gradient aperture three-dimensional porous skeleton formed by sintering inorganic solid electrolyte particles, a polymer electrolyte filled in a pore channel, and a plastic interface stable layer positioned between the electrolyte membrane and an electrode. The preparation method comprises the following steps: preparing a gradient aperture porous framework through a pore-forming agent template method and a tape casting technology, dipping and filling a polymer electrolyte precursor solution in a solution, accelerating in-situ polymerization by adopting electric induction, and performing hot-pressing treatment. The composite solid-state electrolyte membrane has high ionic conductivity, excellent interface compatibility and high mechanical strength, can effectively inhibit the growth of lithium dendrites, can be applied to solid-state batteries such as lithium metal batteries, lithium sulfur batteries and lithium air batteries, and can remarkably prolong the cycle life and improve the safety performance of the batteries, and the preparation process is suitable for large-scale production.

The invention discloses a heat-resistant aluminum rare earth alloy wire containing a two-phase nanostructure and a preparation method of the heat-resistant aluminum rare earth alloy wire, and belongs to the field of non-ferrous metal materials. According to the alloy, aluminum serves as a matrix, and the alloy further comprises, by mass, 0.005%-0.2% of Ce, 0.05%-0.25% of Er, 0.05%-0.25% of Yb, 0.1%-0.2% of Zr and 0.05%-0.2% of Fe. The alloy wire prepared by combining two-stage homogenization, hot extrusion and cold drawing processes contains an Al3 (RE, Zr) nano precipitated phase and a nanoscale Al13Fe4 dispersed phase, the inner layer of the Al3 (RE, Zr) nano precipitated phase is Al3RE, and the outer layer of the Al3 (RE, Zr) nano precipitated phase is Al3Zr; and the nanoscale Al13Fe4 dispersed phase is a nano precipitated phase formed by sequentially coating the outer layer of an Al13Fe4 phase with an Al3RE structure and an Al3Zr structure. The alloy provided by the invention has excellent strength, high-temperature service stability and conductivity.

The invention relates to an aluminum pipe local conduction regulation and control method, system and device based on dynamic electromagnetic field modulation and a medium, and the method comprises the steps: driving an electromagnetic coupling array to scan a target conduction region of an aluminum pipe, so as to construct a three-dimensional dynamic electromagnetic model; analyzing and generating a multi-band excitation parameter combination in a bandwidth constraint range according to the target conductivity gradient parameter; the method comprises the following steps: driving an electromagnetic coupling array by a multi-band excitation parameter combination, collecting an electromagnetic response spectrum of a target conductive area in real time, extracting an eddy current characteristic component set, calculating an obtained phase compensation amount, and dynamically adjusting an excitation phase difference and a power ratio of the electromagnetic coupling array to form a controllable standing wave interference field; and solving the Lyapunov function gradient difference between the node distribution characteristics of the standing wave interference field and the predicted value of the three-dimensional dynamic electromagnetic model so as to iteratively update the multi-band excitation parameter combination. According to the invention, high-precision dynamic regulation and control of the conductivity gradient of the aluminum tube are realized, the energy consumption is effectively reduced, and the stability of a standing wave interference field is enhanced.

The invention belongs to the technical field of batteries, and particularly discloses a secondary battery, a battery pack and an electric device. A negative electrode film layer of the secondary battery contains an additive; the additive comprises a carboxymethyl cellulose compound and a modified compound thereof; the compound is beneficial to improving the ionic conductivity of alkali metal ions and reducing the diffusion polarization phenomenon, so that the internal resistance of the battery is reduced. And the content of the additive in the negative electrode film layer close to the current collector is controlled to be higher than the content of the additive in the negative electrode film layer far away from the current collector, so that the technical effects of reducing the internal resistance of the battery, controlling the cost and reducing the influence on the energy density of the battery are achieved.

The invention relates to an ionic redox couple thermoelectric cement-based composite material, the composite material comprises a cement matrix and redox couples, and the redox couples exist in pores of the cement matrix; wherein the redox pairs are K4 [Fe (CN) 6] and K3 [Fe (CN) 6], and the porosity of the cement matrix is 25%-50%. According to the invention, the migration of ions in a cement matrix is regulated and controlled by introducing the redox couple, so that a relatively high Seebeck coefficient, conductivity and power factor are achieved while good mechanical properties are maintained, and the thermoelectric conversion efficiency is remarkably improved. Besides, the composite material can drive electrode reaction through temperature difference to generate a closed current loop, stable current output is achieved, and the problem of current output of a traditional ionic thermoelectric material is solved.

The invention relates to a solid-state battery positive electrode material layer and a solid-state battery, belongs to the technical field of solid-state batteries, and is used for solving at least one of the problems that an existing solid-state battery is easy to crack, poor in contact and large in resistance, and a solid-state electrolyte battery prepared by a physical vapor deposition method is thin in electrode thickness, low in capacity and the like. A plurality of holes are formed in the positive electrode material layer, the diameter of each hole is 0.1-10 [mu] m, the opening area of each hole in the unit area of the positive electrode material layer accounts for 20-60% of the total area, and each hole is of a through hole structure. The positive electrode material layer of the solid-state battery is provided with a plurality of holes with through hole structures, the solid electrolyte is embedded into the holes, the holes are filled with the solid electrolyte, the solid electrolyte covers the positive electrode material layer, and the holes have specific diameters and opening areas, so that the ionic conductivity is improved, and the service life of the solid-state battery is prolonged. The thickness of the prepared positive electrode material layer can be designed as required.

The invention discloses a gas analysis method and system for a gas source purification process, and relates to the technical field of gas detection and analysis. The method comprises the following steps: synchronously acquiring optical, electrochemical and conductivity detection signals in a gas source purification pipeline, and combining environmental parameters such as temperature, humidity and flow; carrying out filtering, anomaly elimination and normalization processing on the detection signal, constructing a multi-dimensional feature vector, and carrying out dimensionality reduction to obtain a principal component feature; and dynamically distributing weights through a self-adaptive weighted fusion model, and calculating a gas purification characteristic value. Establishing a drift prediction model based on historical data, inputting environmental parameters and operation duration to calculate a predicted drift amount, and correcting a gas purification characteristic value; when the drift distance exceeds a threshold value or reaches a calibration period, standard gas is introduced to detect the average response value of the drift distance, a calibration coefficient is calculated according to the concentration of the standard gas, the calibration coefficient is fed back and updated to the weighted fusion model and the drift prediction model, and self-correction and high-precision analysis of the gas purification process are achieved.

The invention belongs to the technical field of batteries, and discloses a carbon-coated modified lithium manganese iron phosphate positive electrode material and a preparation method and application thereof, and the carbon-coated modified lithium manganese iron phosphate positive electrode material comprises carbon-coated modified lithium manganese iron phosphate positive electrode material particles, the carbon-coated modified lithium manganese iron phosphate positive electrode material particle comprises a lithium manganese iron phosphate core, a first carbon coating layer and a second carbon coating layer, wherein the first carbon coating layer is positioned between the lithium manganese iron phosphate and the second carbon coating layer; the graphitization degree of the first carbon coating layer is greater than that of the second carbon coating layer. The carbon-coated modified lithium manganese iron phosphate positive electrode material has relatively high conductivity, compaction density and the like, and a battery using the carbon-coated modified lithium manganese iron phosphate positive electrode material has relatively high charge-discharge rate, excellent energy density, excellent capacity and the like.

The invention discloses a high-heat-power thermoelectric cell hydrogel for low-grade heat energy collection and a preparation method thereof, and belongs to the technical field of heat energy recovery. The polyacrylamide hydrogel is selected as a substrate of the thermoelectric cell hydrogel, so that a hydrogel internal structure which is easy to regulate and control can be obtained; excellent hydrogel stretchability is obtained by using a cross-linking agent and an initiator with relatively low concentration; potassium ferricyanide and potassium ferrocyanide are used as redox ions to generate a thermoelectric effect, so that stable P-type thermal power is obtained; by using guanidine hydrochloride, the solvation entropy difference between potassium ferricyanide and potassium ferrocyanide is enlarged, and the thermal power of the hydrogel in the thermoelectric cell is greatly improved; sodium pyrrolidone carboxylate is used, so that the concentration of ions in the hydrogel is further improved, the conductivity of the thermoelectric cell hydrogel is improved, meanwhile, a hydrogen bond network between water molecules is destroyed, and the water-retaining property of the thermoelectric cell hydrogel is improved.

The invention discloses a negative electrode active material and a preparation method thereof, a negative electrode pole piece and a secondary battery, the negative electrode active material provided by the invention comprises a silicon-carbon composite material and an aluminum oxide layer coated on the surface of the silicon-carbon composite material, and the silicon-carbon composite material is a composite material of nitrogen-fluorine co-doped porous carbon and nano silicon particles. By optimizing and regulating the porosity and pore size distribution of the porous carbon, the ion transmission kinetics and the structural stability are improved, and the problems of poor rate capability, short cycle life and the like caused by single pore size of the traditional porous carbon are solved. By adopting the nitrogen and fluorine co-doped porous carbon skeleton, the conductivity of the electrode material is enhanced, and the cycling stability of the battery is improved. The nano silicon component uniformly deposited through a chemical vapor phase method provides high specific capacity, the aluminum oxide coating layer can effectively inhibit the decomposition reaction of the solid electrolyte, and the long-term stability and cycle performance of the electrode structure are jointly guaranteed through the dual effects.

The invention discloses a novel induction-type magneto-thermo-acoustic detection method for the conductivity of a supercapacitor, and relates to the technical field of nondestructive material detection.The method comprises the steps that a steady-state static magnetic field and a pulse alternating magnetic field are introduced to form a composite excitation field, and a magneto-acoustic effect and a thermo-acoustic effect are simultaneously and cooperatively excited in a solid-state electrode material; the magnetoacoustic-thermoacoustic coupling effect is formed, eddy current induced by a pulse alternating magnetic field in the material not only generates joule heat, but also generates a direct carrier of Lorentz force under the action of a steady-state static magnetic field, the two physical effects are derived from the same electromagnetic excitation process, but the mechanisms for generating acoustic signals are complementary to each other, so that the effect of the magnetoacoustic-thermoacoustic coupling is achieved. The two effects are coupled as a unified sound source item, a sound pressure wave equation is established, the equation describes a sound field excitation process under the combined action of a force source and a heat source, the coupling mechanism remarkably enhances the strength and information abundance of ultrasonic signals, and the inherent defect that a single thermoacoustic detection method is insensitive to a high-conductivity material is overcome.

The invention discloses a copper-molybdenum alloy component and a manufacturing method thereof, and belongs to the technical field of alloy manufacturing. Mo powder is sequentially subjected to vacuum drying treatment, oxidation-reduction treatment and coating treatment, so that the Mo powder has good flowability and powder laying uniformity; under the preset 3D printing condition, the porous Mo framework which is stably formed and complex in structure can be obtained, the problems that an existing rolling composite method is complex in technological process, strict in technological requirement and the like are solved, and the method is suitable for manufacturing parts with small sizes or complex shapes; the porous Mo framework is subjected to vacuum thermocuring and Cu infiltration treatment, and the obtained copper-molybdenum alloy component is excellent in compactness, high-temperature stability, interface bonding strength, heat conduction, electrical conductivity and the like. The problems that a copper-molybdenum alloy obtained in the prior art is poor in wettability and low in density and uniformity, and the mass content of copper is lower than 30%, so that the heat conductivity, the electric conductivity, the air tightness and other performance are low are solved.

The application belongs to the technical field of batteries, and particularly relates to a silicon-carbon negative electrode material and a preparation method and application thereof. The method comprises the following steps: preparing a porous carbon fiber membrane loaded with a metal catalyst; preparing a dispersion solution of a nano-silicon-based material, and distributing the nano-silicon-based material into the porous carbon fiber membrane to obtain a composite porous carbon fiber membrane; and performing thermal chemical vapor deposition on the composite porous carbon fiber membrane in an inert atmosphere containing a carbon source, growing carbon nanofibers and vertical graphene on the surface of the composite porous carbon fiber membrane, and obtaining a silicon-carbon negative electrode material. Through a synthesis route of thermal chemical vapor deposition (T-CVD), the synthesis process is optimized, and a multi-level three-dimensional network structure of carbon nanofibers and vertical graphene is constructed to enhance the electrical conductivity of the silicon-carbon negative electrode material, accelerate carrier transmission, improve the interface contact performance between the silicon-based material and the carbon material, improve the loading capacity of the nano-silicon-based material, inhibit the volume expansion of the nano-silicon-based material, and improve the structure and cycle stability of the nano-silicon-based material.

The invention belongs to the technical field of aluminum alloy materials and preparation thereof, and relates to a high-strength and high-toughness die-casting aluminum alloy and a preparation technology and application thereof.The aluminum alloy comprises Si, Mg, Cu, Mn, Zn, Fe, Cr, Ti, Zr, Sr, Sb, B, La, Ce, Be, P, smaller than or equal to 0.05% of other single elements, smaller than or equal to 0.15% of other impurity elements in total and the balance Al element, the content of Sr and the content of Sb cannot be larger than or equal to 0.005% at the same time, and the balance Al element. According to a singly-cast sample prepared from the high-toughness die-casting aluminum alloy, the tensile strength at the room temperature is 380-450 MPa, the yield strength is 250-350 MPa, the ductility is 3-8%, the brinell hardness is larger than or equal to 105 HB, the electric conductivity is larger than or equal to 19 MS / m, and the heat conductivity is larger than or equal to 140 W / m.K; and at the temperature of 200 DEG C, the tensile strength ranges from 280 MPa to 350 MPa, the yield strength ranges from 220 MPa to 290 MPa, and the ductility ranges from 5% to 10%.

The invention provides a solid electrolyte membrane, a preparation method thereof and a solid-state battery. The solid electrolyte membrane comprises an inorganic filler, a polymer matrix and a lithium salt, wherein the inorganic filler comprises a dielectric conductive ion material and oxide particles; wherein the dielectric conductive ion material comprises a dielectric filler and a silane coupling agent which is coated on the outer surface of the dielectric filler and contains cyano groups, the dielectric filler contains transition metal elements, and the transition metal elements are Nb elements and / or Ta elements; the oxide particles comprise lanthanum oxide particles; the mass ratio of the dielectric conductive ion material to the oxide particles is (1-5): 1, and the ratio of the total mass of the inorganic filler to the mass of the polymer matrix is (10-50): 100. The solid electrolyte membrane provided by the invention has relatively high ionic conductivity, mechanical strength and structural stability, and can effectively improve the comprehensive performance of the solid lithium metal battery.

The invention relates to the technical field of electrochemical water treatment, and discloses a high-salt waste liquid electric flocculation hardness removal and electrodialysis resourceful treatment method and a high-salt waste liquid electric flocculation hardness removal and electrodialysis resourceful treatment system. The method comprises the following steps: collecting water quality parameters of the high-salt waste liquid and initial electrochemical impedance spectroscopy parameters of a polar plate; calculating the initial current density according to the hardness and the conductivity, carrying out electric flocculation treatment, monitoring impedance spectrum change in real time, identifying the scaling type, and predicting the residual operation time of the polar plate; the current density is optimized according to the prediction time, and the residual hardness is calculated; and adjusting electrodialysis parameters by taking the residual hardness as a feedforward signal for concentration, and performing bipolar membrane electrodialysis on the concentrated solution to obtain acid-alkali liquor. The problems that in the electrochemical treatment process of the high-salt waste liquid, the state of a polar plate cannot be monitored in real time, consequently, operation parameters are adjusted blindly, and energy consumption is high and the recycling efficiency is low due to the fact that parameters of a pretreatment unit and parameters of a pretreatment unit are not linked are solved.

The invention belongs to the technical field of battery preparation, and particularly relates to a secondary battery and electric equipment. The secondary battery comprises a negative pole piece, wherein the negative pole piece comprises a negative current collector and a negative active material layer arranged on at least one surface of the negative current collector; the negative active material layer comprises a main body region and a thinned region arranged at the edge of the main body region, and the thickness of the thinned region is smaller than that of the main body region; the negative pole piece further comprises an ionic conductive composite material, the ionic conductive composite material makes contact with the thinned area, and the ionic conductive composite material comprises ionic liquid and at least one of a conductive polymer and a sodium ion manganese-based layered oxide. According to the invention, the ionic conductive composite material is added into the negative electrode plate and is in contact with the thinned region, so that the effect of protecting the electrode plate is achieved, the sodium ion conductivity and capacity of the thinned region can be improved, polarization and negative electrode side potential drop in the circulation process can be slowed down, sodium precipitation and side reaction are inhibited, the loss of active sodium is reduced, and the service life of the battery is prolonged.

The application provides a negative electrode sheet, a battery and an electric device. The negative electrode sheet comprises a current collector and a negative active material layer coated on at least one side of the current collector; the negative active material layer comprises a negative active material, a silica aerogel and a binder; the silica aerogel is filled between the negative active materials; and the silica aerogel accounts for 0.1% to 5% of the total mass of the negative active material layer. The addition of 0.1% to 5% of the silica aerogel in the negative electrode sheet can improve the ionic conductivity of the negative electrode sheet, shorten the carrier ion conduction path and improve the polarization of the electrode sheet and the battery, thereby effectively improving the cycle performance and rate performance of the battery.

The invention discloses a polymer electrolyte composite material for a high-temperature-resistant solid-state battery and a preparation method of the polymer electrolyte composite material, and belongs to the technical field of solid-state battery materials. The preparation method comprises the following steps: preparation of key functional components, preparation of a precursor solution, dispersion and compounding of the filler, film casting and heat treatment, and post-treatment. A dynamic thioether bond is introduced into a main chain to construct an oxygen-sulfur synergistic coordination network, and a multi-component interface chemical bonding and gradient curing process is combined, so that the problems that the ionic conductivity and the mechanical strength of the traditional polymer electrolyte cannot be considered at a high temperature, the filler is easy to agglomerate, the membrane has many defects and the like are solved; the obtained material still keeps high ionic conductivity and excellent mechanical stability at 150 DEG C, has a wide electrochemical window, and is suitable for high-safety and high-energy-density solid-state batteries.

The application provides a secondary battery and an electronic device, comprising an electrode assembly, the electrode assembly comprising a first electrode sheet, a second electrode sheet and a separator. The first electrode sheet comprises two outer first electrode sheets and an inner first electrode sheet, the two outer first electrode sheets being respectively located at the outermost two sides of the electrode assembly. The first electrode sheet comprises a first current collector and a first active material layer, the first current collector comprising a first surface and a second surface. At least one outer first electrode sheet is a single-sided first electrode sheet, and the first active material layer arranged on the second surface of the single-sided first electrode sheet is a first material layer. The first surface and the second surface of the inner first electrode sheet are both provided with the first active material layer, and the first active material layers arranged on the first surface and the second surface of the inner first electrode sheet are second material layers. The electrical conductivity of the single-sided first electrode sheet is a S / cm, the electrical conductivity of the inner first electrode sheet is b S / cm, and a<=b. Through the above arrangement, the risk of black spots and lithium precipitation of the outer electrode sheet of the electrode assembly is reduced.

An electrified vehicle system is presented. The electrified vehicle system has a traction battery incorporating a plurality of electrically connected array modules submerged in a cooling fluid. A sensing component, coupled with at least one array module and immersed in the cooling fluid, is configured to detect a voltage drop when the fluid's contamination level reaches a threshold, thereby increasing electrical conductivity. This sensed voltage drop is communicated to a traction battery monitoring system, enabling proactive management of cooling fluid integrity.

The invention relates to the field of battery materials, in particular to a binder material, a preparation method, a positive electrode material and a battery. The preparation method provided by the invention comprises the following steps: mixing and grinding a raw material compound and an additive into mixed powder; heating the mixed powder to a melting temperature in a protective gas atmosphere and carrying out a reaction to obtain a molten mass; the molten mass is cooled based on the rapid quenching technology, a nanocrystalline area and an amorphous area are formed in the molten mass cooling process, and a composite structure thin strip is obtained after cooling; forming a lithium-rich layer on at least part of the surface of the composite structure particle; providing a carbon source, mixing the composite structure particles forming the lithium-rich layer with the carbon source, and then carrying out heating treatment to form a carbon layer wrapping the surfaces of the composite structure particles and the lithium-rich layer; and epitaxially growing a carbon nanotube layer on the outer surface of the carbon layer, and obtaining the binder material after the epitaxial growth is completed. A novel binder material which has good ion / electron conductivity, mechanical properties adapting to volume change and suitable processing characteristics is found.

The invention provides an electrolyte treatment system, and relates to the technical field of electrolyte treatment. The electrolyte treatment system comprises a carrier, the carrier is used for carrying a device, a to-be-detected sample tank, a powder storage tank and a liquid storage tank, the powder storage tank is used for storing solid raw materials, the liquid storage tank is used for storing liquid raw materials, and the to-be-detected sample tank is used for storing to-be-detected electrolyte; the carrier, the preparation device and the detection device are arranged around the transfer device in a surrounding manner; wherein the transfer device is configured to be capable of conveying the appliance and the powder storage tank to the preparation device, the solid raw materials in the powder storage tank are injected into the appliance in the preparation device, and the transfer device can be used for injecting the liquid raw materials in the liquid storage tank into the appliance so as to prepare the electrolyte to be detected; the transfer device is configured to be capable of conveying a to-be-detected sample tank or appliance to the detection device, and the detection device can detect at least one of the conductivity, solvation energy and ultraviolet-visible absorption spectrum of the to-be-detected electrolyte.

The invention belongs to the field of battery materials, and particularly relates to a high-adhesion battery diaphragm binder, slurry, a diaphragm and a preparation method of the high-adhesion battery diaphragm binder, and the high-adhesion battery diaphragm binder based on an acrylate copolymer is prepared through a specific reaction. And then, mixing the binder with two inorganic nano materials, namely a lithium-doped aluminum borosilicate nanowire and a sulfo-functionalized lithium zirconate titanate nanosheet, boehmite and / or aluminum oxide and the like, so as to prepare the high-adhesion diaphragm coating slurry. Wherein the nanowires provide mechanical enhancement and chemical crosslinking points, and the nanosheets improve the interface adhesion and the ionic conductivity. And finally, coating the slurry on the surface of a polypropylene diaphragm, and performing multi-stage drying and heat treatment to obtain the composite diaphragm. The diaphragm has extremely high coating bonding strength, excellent electrolyte wettability and good thermal dimensional stability and ionic conductivity, and is particularly suitable for high-energy-density lithium ion batteries and sodium ion batteries.

The invention provides a battery diaphragm and application, and relates to the technical field of secondary batteries. Specifically, the battery diaphragm comprises a base membrane and a coating loaded on at least one side of the base membrane, the coating comprises first ceramic and second ceramic, the first ceramic is filled in the coating, the second ceramic comprises first particles filled in the coating and second particles embedded in the coating, and the number ratio of the second particles to the first particles is 1.2-4.0. The coated diaphragm disclosed by the invention can be used for a cylindrical battery cell, has good heat resistance, thickness consistency, conductivity and electrolyte wettability, can enable the diaphragm and an electrode plate to have larger pores after being wound, improves the electrolyte injection efficiency, provides a space to release the stress of the electrode plate, is not easy to separate out lithium, and can be applied to the field of lithium ion batteries. And the cycle performance and the capacity retentivity of the secondary battery can be obviously improved.

The invention discloses a graphene-aluminum composite material and a preparation method thereof, and belongs to the technical field of metal-based composite material preparation. The raw materials comprise modified aluminum particles and a graphene dispersing agent; the production process comprises the steps of aluminum particle interface modification treatment, graphene dispersing agent preparation, modified aluminum particle wrapping with graphene, heating pressing and heating extrusion forming. A nanometer interface modification layer is constructed on the surfaces of aluminum particles through a modifier to improve wettability and inhibit generation of Al4C3, a specially-made pressing device improves the compactness of a green body, inert gas protection is matched for extrusion, the performance of the composite material is optimized, and the problems that graphene and an aluminum matrix are poor in interface compatibility, prone to agglomeration, prone to generating brittleness at high temperature and the like are solved; the graphene is uniformly dispersed, and the composite material has excellent mechanical properties and high conductivity and is suitable for industrial mass production.

The invention discloses a preparation method and application of a vertically-oriented ferroelectric ceramic-polymer composite solid electrolyte, and belongs to the field of application of solid-state lithium metal batteries. The electrolyte membrane is composed of polyvinylidene fluoride, ferroelectric ceramic powder, lithium salt and the like. The ferroelectric ceramic can form dipoles under the action of an electric field, polyvinylidene fluoride conformation is induced to be converted from an alpha phase to a beta phase, the beta conformation has large dipole moment, dissociation of lithium salt can be promoted, and more free lithium ions are generated. Through multi-solvent blending, the freezing orientation technology can be adjusted, the ferroelectric ceramic-polymer composite solid electrolyte membrane of a vertical ordered structure is prepared, and the shortest path of transmission of lithium ions between a positive electrode and a negative electrode is achieved. The vertically oriented ferroelectric ceramic-polymer composite solid electrolyte can promote lithium salt dissociation, reduce the transportation tortuosity of lithium ions and increase the ionic conductivity. The battery assembled by the material can effectively inhibit the growth of lithium dendrites, and has excellent rate capability and cycling stability.

The invention discloses a preparation method of a modified zinc-bromine flow battery carbon felt negative electrode and the carbon felt negative electrode prepared by the method, and belongs to the field of zinc-bromine flow batteries. A copper organic matter precursor is heated and gasified in a double-temperature-zone tubular furnace, molecules of the partially gasified copper organic matter precursor are loaded to the position where a carbon felt is located by hydrogen and adsorbed on the carbon felt, the copper organic matter precursor reacts with the hydrogen to form a copper elementary substance, and the copper elementary substance is attached to the surface of the carbon felt to form a load. Therefore, the purpose of modifying the carbon felt by loading the copper elementary substance is achieved. According to the method, the obstruction of low conductivity of the loaded oxide on electron transfer in the zinc deposition / stripping process is overcome; inactivation caused by reaction of loaded metal active sites and electrolyte acidic components is avoided; and the problem that the internal fibers of the carbon felt are difficult to uniformly load metal elementary substances or oxide particles due to high surface tension between the metal salt solution and the carbon felt is solved, efficient and uniform loading of the copper elementary substances on the carbon felt is realized, and the negative electrode performance of the zinc-bromine flow battery is remarkably improved.

The invention relates to the technical field of redox flow batteries, and discloses a low-temperature-resistant redox flow battery electrolyte, a preparation method and a zinc-bromine redox flow battery, the low-temperature-resistant redox flow battery electrolyte comprises water, an electrolyte salt, a supporting electrolyte, a 2-phenylbenzopyran type cationic additive and an alcohol solvent. Wherein the 2-phenylbenzopyran type cationic additive has a dual regulation and control function, and can synchronously solve the problems of a multi-bromide shuttle effect and irreversibility of a zinc negative electrode, so that the high-performance zinc-bromine flow battery is constructed. The alcohol solvent not only has little influence on the conductivity and viscosity of the electrolyte, but also can reduce the freezing point of the electrolyte and improve the reaction kinetics of zinc under the low-temperature condition. Through interaction of the alcohol solvent and the 2-phenylbenzopyran type cationic additive, the zinc-bromine flow battery can operate more stably and efficiently in a low-temperature environment, and the problem of low energy efficiency of the zinc-bromine flow battery in the prior art under the low-temperature condition is solved.

The invention discloses a method and a system for measuring an electrode constant of an oil conductivity valuing device, relates to the technical field of measurement, and breaks through the limitation of roughly taking an average value of an area of a polar plate traditionally by constructing an actual conductance cell model and defining parameter information, accurately deduces a conductance cell constant, and reversely calculates an effective relative area to determine the electrode constant. According to the method, the coaxial annular structure characteristics are attached, the influence of the edge effect and electric field line diffusion is avoided, and electrode constant calculation is more scientific and rigorous. Therefore, the accuracy of the constant value of the oil conductivity standard substance is guaranteed, a reliable reference is provided for verification and calibration of an oil conductivity meter, an effective oil conductivity measurement result is ensured, the electrostatic accident risk is reduced from the source, and the oil fuel quality and safety management and control are enhanced. The problems that an existing coaxial annular cylinder type electrode conductance cell is not strict in constant calculation and low in standard value credibility are effectively solved, and the electrode constant measurement accuracy of the oil conductivity valuing device is remarkably improved.