182results about How to "Good reversibility" patented technology

The invention discloses a modified zinc electrode material as well as a preparation method and application thereof, 3, 4-ethylenedioxythiophene, lauryl sodium sulfate and potassium perchlorate are taken as electrolyte, and the surface of a zinc electrode is coated with an organic polymer coating in an electrochemical polymerization manner, so that the problems of dendritic crystal growth, side reaction, corrosion and the like of the zinc electrode are solved; the cycling stability and reversibility of the zinc electrode are improved; meanwhile, the coating has hydrophilicity and better electrolyte wetting capacity, zinc ions are helped to be rapidly diffused on an electrode, and the polarization influence caused by concentration difference in the cycle process of the battery is relieved. Besides, by controlling the electrochemical polymerization time, the thickness of the coating is controlled, and the method has the advantages of simplicity, rapidness and the like and is suitable for large-scale popularization and application.

The invention discloses a rechargeable magnesium battery composite electrolyte and a preparation method and application thereof, the electrolyte comprises an organic ether solvent, an electrolyte magnesium salt and an additive, and the additive is one or two of a sulfimide additive or a phosphate additive. By introducing the sulfimide additive into the organic ether solvent electrolyte containing the electrolyte magnesium salt, the kinetic performance of the electrolyte is remarkably improved under the mutual synergistic effect of all the components, the solvation structure of electrolyte magnesium ions is effectively regulated and controlled, the dissolution of the electrolyte magnesium salt is accelerated, the conductivity of the magnesium ions is improved, and the service life of the electrolyte is prolonged. Reversible electrochemical circulation of the magnesium symmetric battery under high current density is realized, the cycle life of the battery is prolonged, a phosphate ester additive is continuously introduced, a phosphorus-rich magnesium ion conductive interface film is formed on the surface of magnesium metal, the transmission capacity of Mg < 2 + > is enhanced, the overpotential and potential barrier of magnesium negative electrode dissolution / deposition are reduced, and the performance of the battery is improved. Therefore, the electrochemical reversibility and coulombic efficiency of the asymmetric battery are improved.

The present invention belongs to the field of batteries, and specifically relates to a modified current collector for a negative electrode-free sodium metal battery, comprising a planar current collector and a single-layer modified layer composited on its surface; and the modified layer is composed of a binder, a conductive agent and a modified material in a weight ratio of 20-80:10-60:10-20; the modified material includes at least one of Y2O3, Gd2O3, yttrium carbonate, lead carbonate, tungsten carbonate, iridium carbonate, hafnium carbonate, molybdenum carbonate, gadolinium carbonate, yttrium titanate, iridium titanate, hafnium titanate, molybdenum titanate and gadolinium titanate. The thickness of the modified layer is 20-100 μm. The present invention also includes the preparation of the modified current collector and the application in a negative electrode-free sodium battery. The innovative research of the present invention shows that the modified current collector containing the modified material can adapt to the application requirements of negative electrode-free sodium batteries, can induce the deposition of sodium metal, can inhibit sodium expansion, and not only that, can also effectively inhibit sodium dendrites. Applying it to negative electrode-free sodium batteries can significantly improve its electrochemical performance.

The invention discloses zinc ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of ion battery electrolyte. According to the preparation method disclosed by the invention, the coumarin derivative is added into the basic zinc salt solution, so that the uniform deposition of zinc ions can be promoted at a low temperature of-20 DEG C or below, the formation of dendritic crystals is remarkably reduced, and a stable protective layer is formed on the surface of the zinc anode, and the protective layer can maintain high reversibility of the battery at a normal temperature, and also can be used for preparing a lithium ion battery. And the stability can be kept in a low-temperature environment, so that the battery can show excellent electrochemical performance under different temperature conditions, and the technical problem of the electrochemical performance of the water-based zinc ion battery (ZIBs) in the low-temperature environment is solved.

The invention provides a preparation method of a wide-temperature-range high-capacity cascade aqueous zinc-iodine battery and the aqueous zinc-iodine battery, and belongs to the technical field of aqueous zinc ion batteries, the preparation method comprises the following steps: dissolving zinc perchlorate, bacterial cellulose, acrylamide, 1-vinyl-3-butylimidazolium bromide, a cross-linking agent and an initiator in water together to obtain a mixed solution; and carrying out polymerization reaction on the mixed solution at 60-80 DEG C to obtain the bromine-rich polycation hydrogel electrolyte, an iodine composite material is used as a positive electrode, metal zinc is used as a negative electrode, the bromine-rich polycation hydrogel electrolyte is used as an electrolyte, and the aqueous zinc-iodine battery is assembled. The aqueous zinc-iodine battery prepared by the method has extremely high specific capacity and excellent cycle performance in a wide temperature range from-50 DEG C to 50 DEG C.

The invention provides preparation of an MOF-5W material and application of the MOF-5W material in improvement of the performance of an aqueous zinc ion battery through the pore channel limiting effect, and belongs to the technical field of electrochemistry. The MOF-5W material with the long rice morphology is prepared through a solvothermal method, the MOF-5W material, PVDF and NMP are mixed and ground, then a zinc foil is coated with the mixture, an MOF-5W-coated Zn pole piece is prepared after drying and stamping, and the MOF-5W-coated Zn pole piece is obtained. When the pole piece is used as a zinc negative electrode, side reaction and zinc dendrite formation on the zinc negative electrode are effectively relieved, so that the reversibility of the zinc negative electrode is improved, and the aqueous zinc ion battery assembled with the pole piece has good cycling stability and safety.

The invention discloses a double-recognition fluorescent molecular probe, a preparation method thereof and application of the double-recognition fluorescent molecular probe in detection of lead ions and / or glyphosate, and relates to the technical field of detection of lead ions and pesticide glyphosate. The double-recognition fluorescent molecular probe disclosed by the invention is a Schiff base type probe which takes dicyanoisophorone and benzoyl hydrazine as fluorophores. The invention also relates to application of the double-recognition fluorescent molecular probe in lead ion sensing detection. The complex of the double-recognition fluorescent molecular probe and lead ions can be used for sensing detection of glyphosate. The double-recognition fluorescent molecular probe provided by the invention has the advantages of easily available raw materials and simple operation. According to the present invention, the quantitative detection of the lead ions / or the glyphosate by the probe through the different functions displayed by the ultraviolet and fluorescence spectra is achieved, the reversibility is strong, the multi-time cyclic utilization can be achieved, the selectivity is good, the influence by other metal ions is not easily generated, the detection limit is low, and the excellent application imaging is provided in animal bodies such as cells, zebra fish and the like.

The invention relates to the technical field of anti-counterfeiting films, and in particular to a multi-layer composite anti-counterfeiting film and a preparation method thereof. The invention uses styrene, n-butyl acrylate, methacrylic acid and allyl methacrylate as raw materials, and adopts a semi-stepwise emulsion polymerization method to prepare a colloidal microsphere component having excellent structural stability and dispersibility. In the process of preparing a photonic crystal film with the colloidal microsphere component, perovskite quantum dots are added, and the perovskite quantum dots can be embedded in the photonic crystal film formed by the colloidal microspheres, so that the periodic structure of the photonic crystal interacts with the fluorescence characteristics of the perovskite quantum dots, thereby leading to fluorescence enhancement; secondly, the colloidal microspheres serve as a protective layer, wrapping the perovskite quantum dots inside, reducing direct contact between the quantum dots and the external environment, thereby reducing the erosion of the quantum dots by factors such as water, oxygen, light and heat, improving the stability of the quantum dots, and preventing the agglomeration of the perovskite quantum dots, which helps to maintain their optical properties.

The invention discloses a flame-retardant polyurethane composite material and a preparation process thereof, and relates to the field of high polymer materials. When the flame-retardant polyurethane composite material is prepared, tetramethyl tetravinyl cyclotetrasiloxane reacts with DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) to obtain phosphorus modified cyclotetrasiloxane; then, lignin sequentially reacts with 3-aminopropyldimethoxymethylsilane and phosphorus modified cyclotetrasiloxane, and modified lignin microspheres are obtained; the preparation method comprises the following steps: reacting 2, 4-pentanedione, 1, 5-dichloro and hydroxylamine hydrochloride to obtain a dioxime monomer; and uniformly mixing isophorone diisocyanate, 1, 4-butanediol, a dioxime monomer, N, N-dimethyl hexylamine, the modified lignin microspheres and deionized water, pouring into a mold, and curing to obtain the flame-retardant polyurethane composite material. The flame-retardant polyurethane composite material prepared by the preparation method disclosed by the invention has excellent antibacterial property, flame retardance and self-repairing property.

The invention relates to a preparation method of a negative electrode material for greatly exposing (101) crystal faces of a traditional commercial zinc foil by adopting a citric acid etching reaction and application of the negative electrode material in water-based zinc ion battery negative electrode protection. And the crystal faces (100) and (002) are etched off by using citric acid, and a large amount of the negative electrode material of the crystal face (101) is exposed. When applied to a negative electrode of a water-based zinc ion battery, the negative electrode material can improve the migration and nucleation capabilities of zinc ions in the negative electrode, can accelerate the dynamic process of rapid and uniform deposition of the zinc ions, and also can improve the stability of the battery. The stability and the dynamic performance of the negative electrode can be greatly improved, zinc ions can achieve rapid migration and uniform deposition on the surface of the negative electrode, and a good inhibition effect on hydrogen evolution and corrosion behaviors is achieved. Research finds that a layer of ZnS solid electrolyte membrane (SEI) protection layer is formed on the surface of the highly exposed Zn (100) negative electrode in the circulation process to prevent direct contact between an exposed crystal face and electrolyte, so that side reactions such as water decomposition and the like are inhibited, interface free energy is reduced, transfer kinetics of zinc ions is promoted, and the service life of the negative electrode is prolonged. And nucleation and deposition of uniform zinc ions are facilitated. The method for protecting the negative electrode of the aqueous zinc ion battery is simple and safe to operate, shows excellent reversibility, and can stabilize the output of the battery in a whole battery in practical application, and the method for protecting the negative electrode of the aqueous zinc ion battery is provided.

The invention provides a preparation method of a red phosphorus modified lithium-rich manganese-based positive electrode material, a positive plate and a lithium ion battery, and the preparation method comprises the following steps: mixing the lithium-rich manganese-based positive electrode material and red phosphorus in a mass ratio of 1: 0.001-0.01, and calcining for 1-6 hours at 300-600 DEG C in a vacuum state to obtain the red phosphorus modified lithium-rich manganese-based positive electrode material, the chemical general formula of the lithium-rich manganese-based positive electrode material is Li < 1 + x > Mn < 1-x > Ni < 1-x > 2Co < 1-x > 3O < 2 >. The method is low in raw material price and simple in reaction process. After red phosphorus is heated and sublimated at a high temperature, the red phosphorus and the lithium-rich manganese-based positive electrode material are subjected to a gas-solid interface reaction, a phosphate coating is generated on the surface of the positive electrode, spinel and oxygen vacancies are formed at the same time, P doping is realized in the positive electrode, and the reversibility and the structural stability of anion oxidation reduction of the lithium-rich manganese-based positive electrode material are effectively improved; the first coulombic efficiency, the reversible specific capacity and the long cycle stability of the material are improved.

The invention belongs to the technical field of battery materials, and particularly relates to a sodium ion battery positive electrode material and a preparation method and application thereof. The preparation method of the sodium ion battery positive electrode material provided by the invention comprises the following steps: 1) mixing a sodium source, a precursor and a hexavalent tellurium source, and carrying out first calcination to obtain a first calcined material; and 2) mixing the first calcined material obtained in the step 1), a metal selenium compound and an organic solvent, and performing second calcination to obtain the sodium-ion battery positive electrode material. The structure and interface stability of the material are effectively enhanced through a three-in-one modification strategy of doping the high-valence element Te6 + coating the metal selenium compound and adjusting the microstructure, and the obtained sodium ion battery positive electrode material is stable in structure, stable in interface and good in redox reversibility and has good rate capability and cycle performance.

The invention discloses a trimethylolethane modified aqueous zinc ion battery electrolyte and an aqueous zinc ion battery. Wherein the aqueous zinc ion battery electrolyte comprises soluble zinc salt, trimethylolethane and water, after a trimethylolethane additive rich in polar groups (-OH) is introduced into the electrolyte, a zinc negative electrode can be covered by trimethylolethane molecules, and the adsorption of H2O is hindered, so that the side reaction is inhibited; and meanwhile, the adsorbed trimethylolethane adjusts the diffusion and nucleation behaviors of Zn < 2 + > on the surface of the negative electrode, and promotes the preferential deposition of a Zn (002) texture, so that dendrite-free Zn deposition is realized, and the problems of dendrite, hydrogen evolution, corrosion and the like of the current aqueous zinc ion battery negative electrode are solved. Besides, the trimethylolethane adsorbed on the surface of the electrode regulates the double electrode layer at the interface of the zinc negative electrode, so that the number of water molecules in the double electrode layer is reduced, the cycle time of the zinc negative electrode can be effectively prolonged, and the device life of the water-based zinc ion battery is prolonged.

The invention belongs to the field of negative-electrode-free battery systems, and particularly relates to a negative-electrode-free sodium metal battery, a modified diaphragm of the negative-electrode-free sodium metal battery, and preparation and application of the modified diaphragm. The modified diaphragm is composed of a base diaphragm and a binder-free modified layer compounded on the surface of the base diaphragm by adopting a sputtering method, the modified layer comprises at least one nanometer material selected from titanium nitride, zinc nitride and gallium nitride. According to the invention, a modified layer formed by compounding the nanometer material without a binder is innovatively compounded on the base film, and based on the combined control of the structure and the type of the nanometer material, the synergism can be realized, the conduction of sodium ions can be effectively induced, and in addition, the nucleation and deposition uniformity of sodium metal can be improved. The research also shows that when the modified diaphragm is innovatively applied to a negative-electrode-free sodium metal battery system, the nucleation and growth behaviors of sodium can be improved, and excellent long cycle stability can be obtained.

The utility model relates to the technical field of vehicle lamp assembly, in particular to a line body counterweight lifter device based on vehicle lamp assembly, which comprises a rack, a ball screw transmission structure, a lifting platform structure and a counterweight chain wheel structure, the ball screw transmission structure comprises a ball screw vertically arranged on the machine frame and a ball screw connecting base arranged on the ball screw in a matched mode, and a platform deck plate of the lifting platform structure is fixed to the ball screw connecting base and arranged on the front face of the machine frame. The balance weight chain wheel structure comprises a guide wheel and a chain, the guide wheel is rotatably assembled on the rack, the chain is matched with the guide wheel, one end of the chain is arranged on the front face of the rack and connected to the lifting platform structure, and the other end of the chain is arranged on the back face of the rack and provided with a balance weight block. The technical problem that in the prior art, a lifting motor of a chain wheel lifting device used for carrying lamps is greatly impacted is solved.

The invention discloses a negative electrode material based on a graphite lithium ion battery and a preparation method of the negative electrode material in the field of negative electrode materials, N atoms and P atoms are doped in situ in a porous carbon forming process to form a complex structure with multiple pore diameters, so that the charge-discharge performance of the negative electrode material can be improved; according to the invention, the resin foam is used as a skeleton structure, the phosphorus tungsten sulfide nanoparticles are deposited on the skeleton structure, and the supporting property and stability of the graphene skeleton are improved, so that the stability of the structure is maintained in multiple intercalation and deintercalation processes of lithium ions, and the expansion effect caused by lithium intercalation and structural disintegration are avoided; therefore, the stability and the safety of the lithium ion battery are reduced.

The invention discloses a high-adhesion water-based paint and a preparation method thereof, and belongs to the technical field of water-based paints. Comprising the following steps: mixing and dissolving catechol modified acrylic acid of which the end group is amino, a flexible ester monomer, aldehyde olefin and an organic solvent, adding a free radical initiator, and heating for reaction to obtain a modified polyacrylic acid mixture; mixing, stirring and emulsifying the modified polyacrylic acid mixture, an organic silicon flatting agent solution, a compound emulsifier and deionized water to obtain the water-based paint with strong adhesive force. According to the bionics principle, a catechol derivative is introduced into an acrylic monomer, and strong adhesion to an automobile base material is realized through a polymer net structure formed by strong hydrogen bond crosslinking, metal coordination and other actions of the catechol derivative; and amino groups and aldehyde groups on the modified polyacrylic acid polymer can be crosslinked to form a dynamic imine structure, so that the high-temperature resistance of a coating film formed after the coating is coated is improved, and the functions of self-repairing and strong adhesion are realized.

The invention relates to an iron-chromium flow battery electrolyte, a preparation method thereof and an iron-chromium flow battery. The iron-chromium flow battery electrolyte comprises a trivalent chromium ion organic complex, ferrous ions, hydrogen ions, lithium ions, metal ions except lithium, iron and chromium, and a solvent. An organic ligand in the trivalent chromium ion organic complex comprises a compound containing a carboxylic acid group and / or a compound containing an amino group. According to the iron-chromium flow battery electrolyte disclosed by the invention, the organic ligand and the trivalent chromium ions are complexed, and the catalytic action of the lithium ions and other metal ions except lithium, iron and chromium is combined, so that the reaction activity of chromium couple in the negative electrode electrolyte can be remarkably improved, the phenomenon that a large amount of trivalent chromium ions are aged is improved, the hydrogen evolution side reaction is reduced, and the service life of the iron-chromium flow battery is prolonged. And the charge-discharge capacity, the cycle stability and the energy efficiency of the iron-chromium flow battery are comprehensively improved, so that the purpose of high-efficiency operation of the iron-chromium flow battery is achieved.

The invention belongs to the field of air electrode materials of zinc-air batteries, and discloses an asymmetric self-supporting bifunctional oxygen electrode as well as preparation and application thereof. The asymmetric self-supporting bifunctional oxygen electrode comprises a self-supporting sheet material, two surfaces of the self-supporting sheet material are respectively covered with different catalysts, and one surface of the self-supporting sheet material is covered with at least one of a transition metal oxide, a hydroxide, a metal alloy and a porous transition metal alloy; and the other surface of the substrate is covered with a nitrogen-carbon-coated transition metal film or a nitrogen-carbon-coated double-transition metal film. According to the asymmetric electrode prepared by the invention, spatial confinement distribution is carried out on a high-activity OER / ORR catalyst, the mass transfer problem of the zinc-air battery is improved by adjusting an asymmetric aerophile / aerophobic microenvironment, diffusion and transmission of oxygen and a reaction intermediate are more facilitated by proper three-phase interface dynamic equilibrium, the reaction efficiency and the electrode stability are improved, and the service life of the zinc-air battery is prolonged. And the kinetic process and reversibility of the catalytic reaction on the self-supporting cathode are improved.

The invention relates to the technical field of aluminum ion batteries, in particular to an aluminum ion battery negative electrode and an aluminum ion battery, the aluminum ion battery negative electrode comprises a negative electrode substrate and a coating located on the surface of the negative electrode substrate, the coating comprises silicone rubber and derivatives thereof, and the thickness of the coating is 0.1-20 [mu] m. The aluminum ion battery negative electrode comprises the negative electrode substrate and the silicone rubber and derivative coating located on the surface of the negative electrode substrate, and in the electrochemical deposition reaction process of an aluminum ion battery, the deposition uniformity of aluminum metal on the surface of the aluminum ion battery negative electrode can be improved through the silicone rubber and the derivative coating of the silicone rubber; meanwhile, by controlling the thickness of the coating, the exchange current density on the surface of the aluminum ion battery negative electrode can be regulated and controlled, and deposition of large-particle aluminum and generation of aluminum dendrites on the surface of the aluminum ion battery negative electrode can be reduced, so that the short circuit phenomenon of the aluminum ion battery can be reduced, the cycle life of the aluminum ion battery is prolonged, and the coulombic efficiency of the aluminum ion battery is improved.

The invention provides a preparation method of a composite solid electrolyte coated positive electrode material. According to the invention, the silicon coupling agent is coated on the solid electrolyte, and a reticular retaining layer containing organic silicon is formed on the surface of the solid electrolyte, so that the stability of a material interface is effectively stabilized, the electrolyte is prevented from corroding an electrode material, and the rate capability and the cycling stability of a lithium-rich material are greatly improved. Then a cationic polymer is selected as a base membrane to be assembled into two layers of hybrid membranes to coat the outermost layer of the solid electrolyte, and then the crown ether lithium salt complex is introduced into the surface of the phospholipid / cationic polymer hybrid membrane, so that the occurrence of side reactions on the surface of an electrode is effectively inhibited, the structure of an active material is stabilized, and meanwhile, the thermal stability of the membrane is improved; and finally, the surface of the positive electrode material is coated with the composite solid electrolyte.

The invention discloses a (002) crystal face oriented zinc powder negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of secondary batteries. According to the preparation method disclosed by the invention, the zinc powder is adopted as a raw material, the optimization of the form and crystal face structure of the zinc powder is realized by controlling the processes of ball milling treatment and annealing treatment, and the (002) crystal face oriented zinc powder negative electrode material is formed through induction, so that the formation of zinc dendrites is effectively inhibited, and a more compact stacking morphology is presented; and compared with the traditional zinc foil negative electrode, the utilization rate of zinc is remarkably improved, and the energy density of the battery is favorably improved.

This invention discloses a single-doped coated lithium manganese iron phosphate cathode material, its preparation method, and a lithium battery, belonging to the field of lithium battery technology. The raw materials of the cathode material include a lithium source, a phosphorus source, an iron source, a manganese source, a carbon source, and a rare earth metal-doped organometallic framework. The mass content of the rare earth metal-doped organometallic framework is 2%-5%, and the mass content of the carbon source is 1%-4%. In the preparation process of the single-doped coated lithium manganese iron phosphate cathode material, the present invention uses nitrogen atoms as carbon and nitrogen sources. Introducing nitrogen atom doping into the carbon coating of the cathode material can reduce the polarization of the material and enhance the reversibility of the battery. The rare earth metal-doped organometallic framework and carbon source in the present invention can serve as the total carbon source. Increasing the total carbon source content in the cathode material can improve the polarization of the electrode material. However, the total carbon content should not be too high, as excessive carbon will lead to an increase in internal resistance, which in turn will lead to a decrease in its cycle performance and affect the electrochemical performance of the lithium battery.

The invention discloses a carbon-coated oxygen-vacancy-enriched hollow sphere H-CeO2-coated C-NC composite material and a preparation method and application thereof.The method comprises the steps that 1, polyvinylpyrrolidone is dissolved in an ethanol solution, CeCl3. 7H2O is added, Cu2O is added after the CeCl3. 7H2O is dissolved, stirring is conducted at the room temperature, and a brick-red solution is obtained; step 2, dropwise adding a sodium thiosulfate solution into the brick red solution to obtain a faint yellow solution, stirring at room temperature, and then sequentially standing, aging, centrifuging, washing and vacuum drying to obtain light yellow hollow CeO2 powder; step 3, respectively taking the hollow CeO2 powder and dopamine hydrochloride, adding into a Tris buffer solution, uniformly stirring, and sequentially centrifuging, washing and vacuum drying to obtain a CeO2 composite material CeO2 (at) PDA coated with polydopamine; and step 4, placing the CeO2 (at) PDA in a tubular furnace, and performing high-temperature carbonization treatment in an argon atmosphere to obtain the carbon-coated oxygen-vacancy-rich hollow sphere H-CeO2 (at) C-NC composite material which can endow the Li-S battery with excellent rate capability and good long cycle stability.

The invention relates to a lead-bismuth alloy modified graphite felt, a preparation method thereof and application of the lead-bismuth alloy modified graphite felt in preparation of an iron-chromium flow battery. Comprising the following steps: (1) soaking an original graphite felt in concentrated sulfuric acid to obtain an acid-treated graphite felt; (2) adding sodium pyrophosphate, L-tartaric acid, lead nitrate and bismuth nitrate (III) pentahydrate into the nitric acid solution, and carrying out ultrasonic oscillation to obtain a lead bismuth ion electro-deposition solution; and (3) soaking the acid-treated graphite felt in a lead bismuth ion electro-deposition solution, carrying out ultrasonic oscillation, and carrying out electro-deposition modification under constant voltage to obtain the lead bismuth alloy modified graphite felt. According to the preparation method, the graphite felt electrode is subjected to electro-deposition modification by using metal bismuth and lead, and bismuth can promote the oxidation-reduction reaction of chromium ions and also can enhance the reversibility of the reaction; the lead can effectively inhibit the hydrogen evolution reaction, so that the hydrogen evolution reaction is inhibited while the redox reaction strength of the negative electrode of the battery is promoted and the reversibility of the reaction is enhanced, the efficiency of the battery is improved, and the service life of the battery is prolonged.

This invention belongs to the technical field of power equipment operation and maintenance, power distribution line construction, and high-altitude operation machinery. A pole-mounted transformer replacement device based on a truck-mounted crane is characterized by comprising a main frame and support system, a translational load-bearing system, a chain drive system, and a vertical lifting and centering system. The main frame and support system includes a main load-bearing frame, stabilizing legs, and lifting lugs. The translational load-bearing system includes a translational load-bearing platform and a linear guide rail slider assembly. The chain drive system mainly consists of a geared motor, a drive gear, a driven gear, a short transmission chain, a drive sprocket shaft, a bearing support seat, a long transmission chain, and a reducer mounting support. The vertical lifting and centering system includes a centering mechanism, a vertical lifting mechanism, and a vertical lifting support plate. The centering mechanism includes a horizontal drive motor, a horizontal push rod mechanism, and a guide bracket. This device can be transported by truck, deployed quickly, and is suitable for operation in confined and electrified environments.

The invention relates to the technical field of nano materials, in particular to a defect-rich MoS2 three-dimensional flower-shaped nano material and a preparation method thereof.According to the defect-rich MoS2 three-dimensional flower-shaped nano material and the preparation method thereof, a 1T / 2H coexisting MoS2 nano flower formed by assembling nanosheets is synthesized through an ultrasonic cooperation template-free hydrothermal method, and the MoS2 nano flower is reduced through NaBH4 at the room temperature to synthesize a defect-rich MoS2-x nano sheet flower-shaped structure. On one hand, due to the flower-shaped 1T / 2H nanostructure, the MoS2 nanosheet has relatively high conductivity in a 1T phase and has good stability in a 2H phase; on the other hand, the defect engineering strategy can effectively construct charge redistribution on the MoS2-x nanosheet rich in sulfur defects, the intrinsic conductivity is further improved, electrochemical active sites are increased, the diffusion rate of Zn < 2 + > is increased, and the electrochemical performance is optimized. Research results show that the defect-rich MoS2-x nanosheet obtains the specific discharge capacity of 258.3 mAh.g <-1 > at 0.1 A.g <-1 >, good rate capability and excellent cycling stability (the capacity is kept at 91.3% after 1500 times of cycling).

The invention belongs to the technical field of aqueous zinc ion batteries, and particularly discloses a compound additive-containing composite electrolyte for an aqueous zinc ion battery, the composite electrolyte is composed of a water-soluble zinc salt, deionized water and a compound additive, and the compound additive is formed by compounding tetrahydrofuran and phosphoric acid. The tetrahydrofuran and phosphoric acid compounded additive can effectively adjust the pH value of the electrolyte and keep the electrolyte stable in the electrochemical cycle process, the tetrahydrofuran additive changes a zinc ion solvated structure and meanwhile can partially open a ring under the induction of phosphoric acid, more stable linear polyether is formed and anchored on the surface of a zinc negative electrode, and the electrolyte is more stable in performance. Therefore, hydrogen evolution reaction and corrosion of the zinc negative electrode are inhibited, zinc ions are guided to be uniformly deposited, the problems of zinc dendrite growth and the like are solved, and finally the cycling stability of the zinc negative electrode is improved to a great extent.

The application discloses a method for manufacturing a colorimetric sensing unit and array by using a multi-target Bayesian optimization algorithm. Different formulations of colorimetric sensing units are initially prepared on a hole plate; the hole plate is dried, and the dried hole plate is introduced into a gas test to obtain the values of response time, reversibility, responsivity and sensitivity of each formulation; the values of response time, reversibility, responsivity and sensitivity of each formulation are processed by a Sigmoid function to obtain score values, which are substituted into a multi-target Bayesian optimization algorithm to generate a next round of formulation; colorimetric sensing units are prepared on the hole plate according to the formulation; the steps are repeatedly cycled, and the number of cycles reaches a stop condition to obtain a global optimal formulation; and colorimetric sensing units are prepared according to the global optimal formulation. The method solves the problem that multiple indexes of a sensor are simultaneously optimized and some indexes are easily neglected, and can quickly optimize a CO2 colorimetric sensing array which simultaneously has wide range, high sensitivity, fast response and high reversibility.

The invention discloses a lithium ion battery negative electrode with long cycle life and high first efficiency and a preparation method thereof. The lithium ion battery negative electrode comprises a composite current collector, a silicon-carbon negative electrode active material coating coated on at least one surface of the composite current collector, and a lithium supplementing coating coated on the outer surface of the silicon-carbon negative electrode active material coating, the lithium supplementing coating comprises an inorganic lithium-containing compound, halloysite nanotube powder and lithium polyacrylate, and the mass part ratio of the inorganic lithium-containing compound to the halloysite nanotube powder to the lithium polyacrylate is (20-25): (65-75): (2-5); the inorganic lithium-containing compound is a mixture formed by lithium borate and lithium carbonate according to the mass ratio of (1-2): 1. Compared with the prior art, the lithium ion battery negative electrode provided by the invention has relatively high first efficiency, relatively long cycle life and relatively high safety performance.