1575 results about "Zinc ion" patented technology

The invention discloses preparation and application of an organic-inorganic interface layer modified zinc negative electrode. The preparation method comprises the following steps: firstly, dispersing organic polymer polylactic acid and zinc sulfide powder into tetrahydrofuran, then coating the surface of zinc foil with the dispersed solution, and drying a solvent at 70 DEG C, so as to prepare the zinc negative electrode modified by an organic-inorganic interface layer. According to the interface layer, zinc ion deposition is regulated and controlled, and the problem of zinc dendrite growth is solved. In addition, the polylactic acid-zinc sulfide composite coating can effectively improve the redox kinetics of zinc ions and improve the coulombic efficiency of the zinc negative electrode. Due to the good ionic conductivity, the interface modification layer can improve diffusion of zinc ions, and the polarization influence caused by the concentration gradient of the zinc ions is relieved. Therefore, the prepared polylactic acid-zinc sulfide composite interface layer modified zinc negative electrode symmetric battery has more excellent cycling stability, the half battery has more stable coulombic efficiency, and the assembled total battery has more prominent capacity retention rate.

The invention discloses a zinc-bromine flow battery multifunctional negative electrode electrolyte and a preparation method thereof, and belongs to the technical field of electrochemical energy storage, and the method comprises the following steps: uniformly stirring and mixing a solvent, deionized water and a cosolvent, adding an electrolyte, stirring until the electrolyte is completely dissolved, then adding a supporting electrolyte and a negative electrode additive, stirring until the supporting electrolyte and the negative electrode additive are completely dissolved, and obtaining the zinc-bromine flow battery multifunctional negative electrode electrolyte. The multifunctional negative electrode electrolyte of the zinc-bromine flow battery is obtained; the negative electrode cosolvent is dimethylformamide; and the negative electrode additive is at least one of saponin and cinnamyl aldehyde. Saponin molecules are adsorbed on the surface of the zinc electrode, and electronegative carboxyl groups of the saponin molecules form an electrostatic repulsion net in an electric double layer, so that zinc ions are forced to be uniformly dispersed, local ion concentration hot spots are eliminated, and dendritic crystal nucleation is inhibited from the source. In cinnamyl aldehyde, the strong electronegativity of oxygen atoms and the electronegativity of aldehyde oxygen are far higher than those of hydrogen, so that electrons are strongly attracted, adjacent carbon atoms are positively charged, polar adsorption sites are formed, the hydrogen evolution reaction is effectively inhibited, and the stability and the cycle life of the battery are greatly improved.

The invention discloses a zinc polyphenol complex suppository as well as a preparation method and application thereof. The preparation process mainly comprises two steps as follows: a, preparation of EGCG-Zn metal polyphenol complex nanoparticles; and b, preparing the nano complex suppository. The method is simple in process, green, environment-friendly and suitable for large-scale preparation. The prepared EGCG-Zn nanoparticles are uniform in particle size and good in stability, and have good antioxidant, anti-inflammatory and tissue repair activity based on a complex network structure formed by self-assembly of EGCG and zinc ions. The nano-particles are firstly treated by adopting a drug pretreatment carrier and then loaded in a suppository matrix to construct a rectal administration type nano-suppository, so that targeted and continuous local drug effect release can be realized. In intervention of radioactive intestinal injury, the suppository not only can relieve oxidative stress and inflammatory response, but also can promote regeneration and repair of intestinal mucosa, and has good treatment potential and clinical application prospect.

The invention belongs to the technical field of aqueous zinc ion batteries, and discloses a preparation method and application of an aqueous zinc ion battery negative electrode coating material. The composite material is a silver-loaded carbon nitride composite material, and the composite material is used as a water-based zinc ion battery negative electrode artificial interface layer. A silver-loaded carbon nitride composite nano material is used as a zinc negative electrode interface coating. Silver nano ions can effectively improve electrostatic shielding on the surface of the zinc negative electrode, zinc ions are easier to deposit, and growth of zinc dendrites is inhibited; the material has excellent mechanical strength and chemical stability, so that the corrosion of electrolyte to the negative electrode is effectively inhibited; the protective layer is simple in preparation process, the prepared coating is high in adhesive force, a stable interface layer is easy to form, the half-cell cycle efficiency stability is obviously improved, the half-cell can stably circulate for 1323 circles, and the service life of the water-based zinc ion battery is prolonged.

The invention discloses a nitrogen-doped zinc ion battery manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a strong oxidant and a manganese salt, putting the mixture into a beaker, adding deionized water, and uniformly stirring to form a mixed solution; transferring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating the high-pressure reaction kettle in a drying oven; cooling, precipitating, filtering and washing for multiple times, and then putting into a drying oven for vacuum drying to obtain an original manganese-based positive electrode material; the preparation method comprises the following steps: respectively weighing an original manganese-based positive electrode material and hexamethylenetetramine, flatly laying the original manganese-based positive electrode material at the bottom of a lining of a reaction kettle, and putting the hexamethylenetetramine into a beaker; and putting the beaker into a reaction kettle, moving the beaker and the reaction kettle into a drying oven, and heating to obtain the surface nitrogen-doped manganese-based positive electrode material.

The invention discloses a metal supported activated carbon catalyst for efficiently preparing aquacide dichloride and application of the metal supported activated carbon catalyst. The catalyst is prepared by taking activated carbon as a carrier, loading Lewis acid active components such as aluminum ions, zinc ions, iron ions, copper ions and the like through an impregnation method, and carrying out vacuum pyrolysis activation treatment at 300-600 DEG C. The catalyst synergistically catalyzes a nucleophilic substitution reaction of a pyridine derivative and alkyl halide in an aprotic polar solvent such as acetonitrile or nitrobenzene, and synthesis of diquat dichloride can be realized under the conditions that the temperature is 100-180 DEG C and the pressure is 1-3 MPa. In a reaction system, the mass ratio of the pyridine derivative to the catalyst to the solvent is 1: (0.01-0.05): (5-8), and real-time monitoring and regulation are performed through an online infrared spectrum, a liquid chromatograph and a gas chromatograph-mass spectrometer. The purity of the product is more than 99% after the product is subjected to filtration, recrystallization with an ethanol-water mixed solvent and vacuum drying. The catalyst provided by the invention has the characteristics of high activity, strong stability and recoverability, obviously improves the atom economy of the reaction, simplifies the production process, reduces the energy consumption and pollution, and is suitable for large-scale industrial production.

The invention relates to the technical field of water-based energy storage batteries, in particular to a two-phase electrolyte for a water-based zinc ion battery and a preparation method of the two-phase electrolyte, and the two-phase electrolyte comprises soluble zinc salt, water and quaternary ammonium nitrate; the soluble zinc salt comprises one of zinc trifluoromethanesulfonate, zinc bis (trifluoromethylsulfonyl) imide, zinc acetate, zinc sulfate and zinc chloride, and the molar concentration of the soluble zinc salt is 1-5 mol / L; the quaternary ammonium nitrate is one or more than two of tetramethylammonium nitrate, tetraethyl ammonium nitrate, tetrabutyl ammonium nitrate, hexadecyl trimethyl ammonium nitrate and octadecyl trimethyl ammonium nitrate, and the molar concentration of the quaternary ammonium nitrate is 1-3 mol / L. The preparation method is simple, convenient and efficient, the reversibility of the zinc anode is optimized, the method is crucial for promoting the design of a practical water-based zinc ion battery, and the application of the zinc-based battery in the field of energy storage is further accelerated.

The invention discloses an attenuated artificial bear gall powder nano preparation, the physical structure of which is a core-shell structure, the core is zinc oxide nanoparticles, the shell is mesoporous SiO2, and artificial bear gall powder is attached to the outer surface of the shell, through the design of the core-shell structure, the dissolution of zinc ions can be reduced while efficient loading and pH response release of the artificial bear gall powder can be realized, and the toxicity of the artificial bear gall powder can be reduced. The toxicity of the preparation is reduced; the invention further discloses a preparation method which has the characteristics of simple steps, low cost and suitability for industrial production. The invention further discloses a novel application range, namely, the compound has a wide clinical application prospect in the fields of inflammatory bowel diseases and the like needing targeted anti-inflammatory treatment.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention relates to a self-repairing ionic gel electrolyte, a zinc ion battery and a preparation method and application of the self-repairing ionic gel electrolyte and the zinc ion battery. The ionic gel electrolyte comprises a polymer network, ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate) and movable zinc ions, the polymer network is obtained through a reaction of an anionic monomer 2-acrylamido-2-methyl sodium propanesulfonate and a cationic monomer acryloyloxyethyl trimethyl ammonium chloride, and the movable zinc ions are provided by a zinc tetrafluoroborate hydrate. The zinc ion battery takes the ionic gel as an electrolyte, and a positive film electrode and a negative film electrode are arranged on two sides of the ionic gel. Compared with the prior art, the material not only has excellent mechanical properties and efficient ion transmission capability, but also has the capability of quickly repairing mechanical damage, and the completely broken material can be completely repaired after being contacted for 10 seconds under infrared light irradiation. The prepared zinc ion battery has excellent self-repairing performance, flexible performance and electrochemical performance.

The invention relates to the technical field of alkaline zinc-manganese flow batteries, in particular to an alkaline flow battery based on carbon felt surface functionalization and electrolyte additive collaborative optimization. The surface functionalization of the carbon felt is that the carbon felt is modified by nitrogen-doped carbon dots, so that the pore size of the carbon felt is increased, the pore volume, the specific surface area and the hydrophilicity of the carbon felt are improved, the wettability of an electrolyte and the adsorption capacity to zinc atoms can be enhanced, and more zinc deposition sites are provided. Sodium gluconate is selected as an additive and is coordinated with zinc ions in the negative electrode electrolyte, so that the solvation structure of the zinc ions is changed. Through cooperative regulation and control of carbon felt modification and sodium gluconate, the zinc deposition morphology is changed, the zinc deposition is compact and uniform, the performance of the battery is improved, and the cycle life of the battery is prolonged. The invention has the advantages of outstanding performance, safety, environmental protection, low price and the like.

The embodiment of the invention relates to the technical field of electrolytes, and provides a preparation method of a hydrogel electrolyte, the hydrogel electrolyte and a zinc ion battery, and the preparation method comprises the following steps: preparing a chitosan aqueous solution with a first preset concentration; the preparation method comprises the following steps: adding a certain amount of genipin into a chitosan aqueous solution, so that the genipin and chitosan in the chitosan aqueous solution are crosslinked at a first preset temperature; coating the cross-linked slurry on a substrate of a preset material, and drying and demolding at a second preset temperature to obtain a hydrogel electrolyte dry film; and soaking the hydrogel electrolyte dry film in a liquid electrolyte with a second preset concentration to absorb the liquid until the liquid is saturated, thereby obtaining the hydrogel electrolyte. Chitosan and genipin used in the embodiment of the invention are natural substances and are non-toxic and harmless, so that the prepared hydrogel electrolyte belongs to an environment-friendly electrolyte material, the problem that a cross-linking agent in a traditional electrolyte material is relatively high in toxicity is effectively avoided, and the problem of side reaction caused by using water as an electrolyte solvent is also avoided.

The invention discloses a ruthenium-substituted doped manganese dioxide positive electrode material for a zinc ion battery as well as a preparation method and application of the ruthenium-substituted doped manganese dioxide positive electrode material. The cathode material has the following chemical composition: KxMn1-yRuyO2. ZH2O (0.2 < = x < = 0.5, 0.01 < = y < = 0.2, and 0 < = z < = 0.5). The transition metal ruthenium is adopted to carry out atomic-scale substitution doping on the manganese dioxide positive electrode material, Mn < 4 + > in the [MnO6] octahedron is substituted by the transition metal ruthenium, a Ru-O chemical bond is formed, the electronic structure and the crystal structure of manganese dioxide are regulated and controlled, and the electronic conductivity and the structural stability of manganese dioxide are enhanced. The ruthenium-substituted doped manganese dioxide positive electrode material shows improved rate capability and excellent cycling stability in an electrochemical performance test, and is a relatively ideal zinc ion battery positive electrode material. In addition, the material is simple in preparation process method, good in repeatability, high in yield and suitable for large-scale production and practical application.

The invention discloses a layered liquid crystal electrolyte based on a dynamic self-assembly strategy and a preparation method and application thereof, and belongs to the technical field of new energy materials, and the preparation method comprises the following steps: uniformly mixing dodecyl non-glycol ether and n-decanol according to a mass ratio, heating and centrifuging to a homogeneous phase to obtain a mixed element; dropwise adding a zinc chloride aqueous solution into the mixed element, carrying out vortex mixing, and centrifuging to remove bubbles; placing the sample in a constant-temperature environment for standing, and screening a phase region with anisotropic characteristics through a polarizing microscope; and continuously carrying out constant-temperature self-assembly on the screened sample, and representing the lamellar liquid crystal structure through a polarized optical microscope and small-angle X-ray scattering. A two-dimensional layered liquid crystal structure is constructed through synergistic self-assembly of the surfactant and the solvent, a zinc ion source is provided in combination with the zinc chloride aqueous solution, and the ion transmission efficiency and the thermal stability are remarkably improved.

The invention discloses a modified zinc negative electrode and an aqueous zinc ion battery comprising the same, the modified zinc negative electrode comprises a negative electrode current collector, at least one surface of the negative electrode current collector is provided with a modified coating, and the modified coating comprises a rare earth-based metal organic framework material and a binder. In the modified coating, the rare earth-based metal organic framework material changes the microstructure of the zinc negative electrode and homogenizes the surface electric field and ion flow of the zinc negative electrode, so that disordered deposition of zinc ions can be blocked, a uniform transmission channel can be provided for the zinc ions, growth of zinc dendritic crystals and dead zinc accumulation on the surface are inhibited, and the zinc negative electrode has the advantages of high corrosion resistance and high corrosion resistance. And meanwhile, direct contact between the electrolyte and the zinc negative electrode can be effectively avoided, and hydrogen evolution side reaction and electrode corrosion are inhibited, so that the cycle performance of the aqueous zinc battery is improved.

The invention relates to the technical field of analysis and detection, in particular to an online monitoring method and system for trace zinc ions in an aqueous solution. A sampling processing module filters an input aqueous solution to be detected and carries out total organic carbon detection on the filtered aqueous solution under a preset wavelength; digesting the filtered aqueous solution to be detected according to a total organic carbon detection result, and conveying the digested aqueous solution to an enrichment module, or conveying the filtered aqueous solution to be detected to the enrichment module; the enrichment module is used for carrying out trace zinc ion enrichment on the input aqueous solution to be detected, and the desorbed aqueous solution to be detected after enrichment is conveyed to the trace zinc ion detection module for trace zinc ion detection. The problems that a traditional detection method is low in sensitivity, complex in operation, low in detection efficiency and the like are solved, and the method is suitable for intelligent and automatic monitoring of surface water, drinking water, specific application scene water solutions and the like and has the advantages of being high in sensitivity, automation degree and anti-interference capacity and low in operation cost.

The invention discloses an aqueous zinc ion battery with in-situ gel electrolyte and a preparation method thereof, and the preparation method comprises the following steps: S1, adding SBMA into a zinc trifluoromethanesulfonate solution, and stirring to form a homogeneous transparent solution A; s2, adding polyethylene glycol, an initiator and a cross-linking agent into the homogeneous transparent solution A, and fully stirring to a homogeneous state to obtain a precursor solution B; s3, the precursor solution B serves as an electrolyte solution, assembling and press sealing are conducted according to the conventional assembling process of the water-based zinc ion battery, then heating is conducted, the precursor solution B is converted into a solidified state in situ, and the water-based zinc ion battery with the in-situ gel electrolyte is obtained. The in-situ gel electrolyte with a vertical structure is formed by adopting a mode of firstly packaging and then gelatinizing and taking a zinc negative electrode as an initiation interface and also as a reducing metal to provide electrons, so that the high cycle stability of the battery is realized.

The invention discloses an anti-freezing and self-healing hydrogel electrolyte of a water-based zinc ion battery and a preparation method of the anti-freezing and self-healing hydrogel electrolyte, and belongs to the technical field of water-based zinc ion batteries. The method comprises the following steps: (1) mixing a functional material, an acrylic monomer, an initiator, a cross-linking agent and soluble iron (III) salt to obtain a first product; (2) degassing the first product to remove bubbles, and then carrying out polymerization reaction to obtain a second product; and (3) soaking the second product in a 2-10 mol / L electrolyte aqueous solution for treatment to obtain the anti-freezing and self-healing hydrogel electrolyte. The hydrogel electrolyte prepared by the invention has high ionic conductivity and adhesion, and has good anti-freezing and self-healing capabilities. And when applied to the aqueous zinc ion battery, the composite material shows an ultra-long cycle life, can stably supply power even in an extremely severe environment, and has certain research significance for promoting flexible electronic equipment and large-scale energy storage application.

The invention belongs to the technical field of electrochemical batteries, and discloses a hydrophobic-zinc-philic interface protection layer of a high-rate zinc metal negative electrode and preparation and application of the hydrophobic-zinc-philic interface protection layer. The preparation method comprises the following steps: dissolving a polyvinyl alcohol derivative in a polar solvent, uniformly distributing a precursor on the surface of zinc metal through a gradient spin-coating process (including a low-speed pre-coating process and a high-speed spin-coating process), and inducing phase separation by using a specific saturated salt solution. And finally preparing the hydrophobic-zinc-loving interface protection layer of the high-magnification zinc metal negative electrode. According to the hydrophobic-zinc-philic interface protection layer, a hydrophobic long chain is used for inhibiting water-related side reactions, rapid transmission of zinc ions is promoted through a zinc-philic functional group, and then the zinc metal negative electrode and the zinc battery which have excellent rate capability (40mA cm <-2 >) and long cycle stability (2000h) at the same time are achieved. In addition, the preparation process is mild in reaction conditions and simplified in operation steps, has large-scale production potential and has remarkable industrial application prospects.

The invention discloses a preparation method of photo-thermal-MMP dual-response matrix hydrogel and application of the photo-thermal-MMP dual-response matrix hydrogel in diabetic wound repair, and belongs to the technical field of biological medicine. According to the present invention, the Cur (at) ZIF-8 (at) MMPDA / dAMG composite hydrogel is composed of an amnion source photo-crosslinked matrix hydrogel, curcumin-loaded ZIF-8 nanoparticles and MMP2 peptide modified polydopamine, and the Cur (at) ZIF-8 (at) MMPDA / dAMG composite hydrogel is obtained; the ZIF-8 nanoparticles decline in an acid environment to release zinc ions, destroy bacterial cell membranes, enhance the permeability of a biological membrane and cooperatively kill drug-resistant bacteria in combination with a photothermal effect, Cur is loaded through ZIF-8 to form Cur-coated ZIF-8, then a Cur-coated ZIF-8-coated MMPDA / dAMG double-drug-loading system is constructed through an MMPDA medium, and a photothermal antibacterial, anti-inflammatory and regeneration-promoting multi-mode therapy is formed for a wound surface in the acid environment. Therefore, wound healing is accelerated.

The invention discloses a V6O13 nano material and a preparation method and application thereof, and belongs to the technical field of aqueous zinc ion batteries, the preparation method of the V6O13 nano material comprises the following steps: taking V2O5 as a vanadium source, and adopting a hydrothermal method to prepare an intermediate product; and the intermediate product is subjected to annealing treatment, and the V6O13 nanometer material is obtained. According to the preparation method disclosed by the invention, a hydrothermal-annealing synergistic strategy is adopted, firstly, an intermediate product is prepared by taking V2O5 as a vanadium source and adopting a hydrothermal method, and then, the V6O13 nano material with more complete lattice arrangement is obtained through high-temperature annealing, so that higher battery capacity and more stable long cycle life are realized, and a new scheme is provided for research on an aqueous zinc ion battery positive electrode material.

This application relates to the field of hydrogel electrolyte technology, specifically disclosing a modified sodium alginate crosslinked hydrogel electrolyte, its preparation method, and its applications. This application reduces environmental toxicity and pollution by introducing modified sodium alginate as a crosslinking agent into the hydrogel electrolyte. The interaction between sodium alginate and zinc ions inhibits zinc dendrite formation, regulates the interfacial growth between the negative electrode and the electrolyte, and thus extends battery life; it also has a certain inhibitory effect on hydrogen evolution reaction. This application can prepare the modified sodium alginate crosslinked hydrogel electrolyte using a simple free radical polymerization method. Furthermore, compared to conventional aqueous batteries, the hydrogel electrolyte can better control the interfacial growth of the positive and negative electrodes.

The invention belongs to the technical field of zinc ion batteries, and particularly discloses a degradable gel electrolyte zinc ion battery, which is prepared by the following steps: preparing a gel electrolyte from a polyethylene-polypropylene copolymer and a hydrolyzable / photolytic polymer, taking aluminum-doped vanadyl phosphate as a positive electrode, and taking zinc as a negative electrode. The polyethylene-polypropylene copolymer as a matrix material provides excellent chemical stability and mechanical toughness, and polylactic acid is modified to introduce hydrophilic groups, so that not only are high mechanical strength and biocompatibility retained, but also a channel and an interface beneficial to zinc ion transmission are constructed. The degradable electrolyte and the degradable flexible quasi-solid-state zinc ion battery are designed, so that the safety and the reliability of the battery are improved, and the flexible quasi-solid-state zinc ion battery is suitable for being applied to various electronic equipment needing flexibility and degradability.

The invention discloses a metal negative electrode material with a bacterial cellulose protective layer generated on the surface in situ and a preparation method, and the method comprises the following steps: adding Komagataeibacter sucrofermentans bacterial mother liquor into a sterilized culture medium, carrying out constant temperature static culture, and biosynthesizing bacterial cellulose; putting the metal sheet into a culture medium, and generating a bacterial cellulose coating layer on the surface of the metal sheet through in-situ polymerization; and taking out the metal sheet, and performing soaking, washing and vacuum drying to obtain the metal sheet negative electrode BC (at) Metal with a bacterial cellulose protective layer on the surface. The ultrathin three-dimensional nano reticular fiber layer is polymerized in situ on the surface of the prepared zinc metal negative electrode, is tightly combined with the zinc metal negative electrode, is not easy to fall off, has high mechanical strength, has super-hydrophilicity and capability of promoting zinc ion transmission, and can improve the electrochemical performance of the zinc negative electrode in the water-based zinc ion battery. The method is simple in preparation flow, controllable in process, good in stability, capable of achieving batch production and suitable for macro preparation.

The invention discloses macromolecular antibacterial artificial leather and a preparation method thereof, and relates to the technical field of artificial leather preparation. The preparation method comprises the following steps: preparing zinc-loaded silicon dioxide with amino grafted on the surface and quaternized polyether polyurethane containing an epoxy group, mixing the zinc-loaded silicon dioxide and the quaternized polyether polyurethane to prepare antibacterial protection slurry, and bonding the zinc-loaded silicon dioxide and the quaternized polyether polyurethane through ring-opening reaction of the amino and the epoxy group during curing to form a cross-linked network, so as to obtain the antibacterial protection layer with antibacterial property, flexibility and wear resistance; zinc ions have an obvious inhibiting effect on bacteria such as gram-positive bacteria and gram-negative bacteria and fungi such as candida albicans, quaternary ammonium salt has an obvious inhibiting effect on influenza viruses, and the zinc ions and the quaternary ammonium salt have a synergistic effect, so that the antibacterial range of the artificial leather is wider, the inhibiting force on germs is stronger, and the antibacterial property of the artificial leather is further improved.

The invention provides a PDA-ZrO2 coated zinc anode, a preparation method thereof and a battery, and belongs to the technical field of electrochemical energy storage materials. According to the zinc anode, a polydopamine-zirconium dioxide composite protective layer is constructed on the surface of a zinc substrate. According to the composite layer, a polydopamine bottom layer is formed through self-polymerization of dopamine on the surface of the zinc foil, and then a zirconium dioxide layer is introduced on the polydopamine bottom layer through an in-situ mineralization method. The PDA-ZrO2 composite layer disclosed by the invention has the main advantages that the PDA-ZrO2 composite layer ingeniously combines the strong adhesive force, excellent flexibility and ion regulation and control capability of polydopamine and the high mechanical strength and chemical stability of zirconium dioxide. The synergistic effect of'soft and hard combination 'can effectively homogenize zinc ion flow, inhibit dendritic crystal growth and block side reaction caused by water molecules, so that the interface stability of the zinc metal anode is remarkably improved, and the cycle life of the zinc metal anode is remarkably prolonged. The preparation method is simple in process, mild in condition and easy for large-scale production.

The invention discloses composite gel with ROS and pH dual responsiveness and a preparation method and application thereof.The preparation method comprises the steps that gold nanoparticles are prepared, gold nanostars GNS grow, a surfactant and biguanide drugs are added to obtain drug-loaded gold nanostars GM, a metal organic framework is introduced to obtain drug-loaded nanoparticles GMZ of a core-shell structure, and the composite gel is prepared. And reacting with a TSPBA solution, an astaxanthin solution and a polyvinyl alcohol PVA solution for crosslinking to obtain the ROS and pH dual responsive composite gel. According to the invention, the gold nanostars are used as a photosensitizer to construct the multifunctional composite gel, and the metal organic framework structure degrades under a slightly acidic condition of a psoriasis epithelium microenvironment to release released zinc ions, so that the gel is endowed with various treatment effects, excellent photo-thermal treatment performance and controlled release performance of the zinc ions and drugs. The gel has ROS responsiveness, can remove excessive ROS in a psoriasis microenvironment, and realizes the treatment of oxidation resistance, inflammation resistance and keratinocyte proliferation inhibition of psoriasis by combining with a nano drug delivery system.

The invention discloses a metal-doped hard carbon negative electrode material and a preparation method thereof, and relates to the technical field of sodium ion batteries. The method comprises the following steps: 1) mixing a zinc salt activator and a carbon source according to a certain proportion, and stirring to obtain a zinc-doped hard carbon precursor; and 2) performing high-temperature carbonization on the mixture in an inert gas environment to obtain the negative electrode material. The preparation method disclosed by the invention is simple to operate and relatively low in cost, the obtained zinc-doped hard carbon negative electrode material contains rich microporous and mesoporous structures, more sodium storage sites are provided, the diffusion rate of sodium ions is increased by zinc ions through interlayer spacing regulation and control, a charge shielding effect and improvement of interface dynamics, and the performance of the zinc-doped hard carbon negative electrode material is improved. The first-circle coulombic efficiency and the circulation rate capability are promoted to be obviously improved.

The invention discloses an aqueous electrolyte, a preparation method thereof and an aqueous battery, belongs to the technical field of aqueous batteries, and solves the problems of high polarization potential and short cycle life of an aqueous zinc ion battery in the prior art. The aqueous electrolyte comprises the following components: zinc salt, an additive and water; wherein the additive comprises sulfonate, acetate and halide. The aqueous battery adopting the aqueous electrolyte is long in cycle life and low in polarization potential.

The invention relates to a vacancy-assisted tin heterovalent doped bismuth selenide material as well as a preparation method and application thereof, Se vacancy defects existing in VSe-Bi2Se3 are utilized to assist in stable doping of Sn < 4 + > into Bi sites, so that the Sn-VSe-Bi2Se3 material is obtained. As the positive electrode material of the zinc ion battery, the Sn-VSe-Bi2Se3 shows high specific capacity, excellent rate capability and long-acting stable cycle performance, and has the advantages of simple and convenient process, mild conditions and suitability for large-scale production.