192 results about "Zinc ion" patented technology

The application discloses an automatic control method for oxidation flocculation parameters in mancozeb wastewater treatment, and belongs to the technical field of industrial wastewater treatment and automatic control. In view of the problem that the existing process relies on manual experience and the oxidation and flocculation stages are improperly connected, the multifunctional modified material containing dithiocarbamate salt groups, quinone groups and pre-complexed manganese and zinc ions is prepared first; the material and hydrogen peroxide are synchronously added in the acid oxidation stage, and the control system monitors the redox potential change rate in real time; when the redox potential reaches the preset threshold value and the characteristic change point with the first derivative of zero or the change from positive to negative appears and is maintained for the preset maintenance time, the system is automatically adjusted to be alkaline, the modified material triggers the net capture and chelation crosslinking reaction, and finally solid-liquid separation is carried out; the polymer skeleton is protected from indiscriminate attack of free radicals, the problem of drug antagonism is overcome, and the stable and up-to-standard effluent quality is realized.

The application belongs to the technical field of battery processing, and particularly discloses a zinc ion battery tab welding, detecting and assembling device, which comprises a conveying channel for conveying the battery; a point bottom welding mechanism, a gasket assembling mechanism and a port forming mechanism are sequentially arranged along the conveying direction of the conveying channel; the point bottom welding mechanism is used for welding the lower tab of the battery and the bottom of the shell; the gasket assembling mechanism is used for punching and assembling the insulating gasket into the battery shell; the port forming mechanism comprises a port rolling groove and an inner wall glue coating; the zinc ion battery tab welding, detecting and assembling device further comprises a detecting and sorting mechanism. The key processes such as tab welding, point bottom welding, multi-channel online detection, insulating gasket assembly and port forming are integrated in the continuous automatic assembly line, which helps to optimize the production rhythm, reduce the material turnover and waiting time between processes, and thus supports realizing higher production efficiency and capacity output in a compact space.

The application belongs to the field of rechargeable secondary batteries, and particularly relates to a water-based zinc ion battery capable of working in a wide temperature range, which is composed of a positive electrode, a negative electrode and an electrolyte. The positive electrode material is an n-type organic substance; the negative electrode is a metal zinc foil or a metal zinc powder; the electrolyte takes deionized water as a main solvent, takes inorganic lithium salt or inorganic sodium salt and a small amount of organic zinc salt as solutes, has the characteristics of high boiling point and low freezing point, and shows good ion conductivity in a relatively wide temperature range (-40 DEG C to 100 DEG C). Different from traditional zinc ion batteries, the zinc ion battery proposed in the application can stably work in the temperature range of -40 DEG C to 100 DEG C, shows good rate performance and cycle stability, and can be used for large-scale energy storage devices in extreme environments such as military and aerospace.

The present disclosure provides a Group II-VI core-shell quantum dot and a preparation method therefor. A quantum dot shell having a gradient alloy structure is gradually grown by using a precursor that has a reactivity gradient. The gradient alloy structure has a band gap that gradually increases from inside to outside, thereby solving the problem of difficulty in epitaxial growth caused by a decrease in the surface activity of a quantum dot along with an increase in the size thereof. By using zinc halide and octanethiol to regulate crystal facets, the proportion of polar facets on the surface of the quantum dot is increased, and the stability of the quantum dot is significantly improved. Moreover, provided is a low-cadmium quantum dot core. A hot-injection method is used to perform nucleation and growth of ZnSe at a high temperature, a cadmium precursor is then added after the stable nucleation of ZnSe, and cadmium / zinc ion exchange is performed by utilizing the binding energy of selenium / cadmium that is stronger than that of selenium / zinc, thereby forming a CdZnSe ternary core, which can solve the problem of it being difficult for blue-light quantum dots that use CdZnSe as a light-emitting core to cover the pure blue band.

The application relates to a composite type corrosion and scale inhibition water treatment agent, which is obtained by in-situ copolymerization of phosphono carboxylic acid copolymer after modification of nitrogen-doped carbon quantum dots on the surface of attapulgite as a carrier. The application has the beneficial effects that: the attapulgite is used as the carrier, can be used as a grafting bridge to load the carbon quantum dots on the surface and in-situ generate the phosphono carboxylic acid copolymer, and has a synergistic effect; the nitrogen-doped carbon quantum dots have rich amino, carboxyl and hydroxyl functional groups on the surface, make it difficult for calcium carbonate microcrystals to gather or interfere with the normal growth of the crystals to inhibit scale crystal generation, have high stability, are coated with zinc ions, improve the antibacterial property of the material, are modified on the surface of the attapulgite, have excellent adsorption performance, and can effectively remove organic matters, heavy metals and the like in water; the phosphono carboxylic acid copolymer is in-situ generated on the surface of the attapulgite, has a good compounding effect, has a good effect on corrosion inhibition, and has good corrosion inhibition performance.

The application belongs to the technical field of zinc ion batteries, and specifically discloses a zinc negative electrode and application of the zinc negative electrode in a zinc ion battery, wherein the zinc negative electrode comprises zinc material, the surface of the zinc material is coated with a protective layer, the protective layer is composed of a heterojunction material, a binder and an organic solvent, the mass ratio of the heterojunction material, the organic solvent and the binder is 7:2:1, the heterojunction material is a Cu2O / CuO heterojunction, the preparation method of the Cu2O / CuO heterojunction is as follows: taking alkaline copper chloride as a precursor and glucose as a reducing agent, the Cu2O / CuO heterojunction is generated in an alkaline hydrothermal system through one-step reaction, and then the Cu2O / CuO heterojunction is purified through hot water washing, the heterojunction material contains oxygen vacancies at the Cu2O / CuO interface, and the heterojunction interface forms a built-in electric field and a band bending. 2+ The Cu2O / CuO heterojunction protective layer of the application is driven by a built-in electric field, is functionalized by oxygen vacancies, and is self-aligned by a band, and the above-mentioned three mechanisms are synergized, so that the Zn 2+ full-path fast transportation, which is significantly better than existing single-phase or physical mixed protective layers.

This invention provides a long-lasting antibacterial spray, its preparation method, and its application. The antibacterial spray comprises a polyphenol adhesion component, metal ions, auxiliary polyphenols, a network stabilizer, and water. The metal ions form a dynamically reversible coordination network with the polyphenol adhesion component; the metal ions include silver ions and zinc ions. In this invention, the silver nanoparticles may undergo surface oxidation or coordination dissociation processes in the polyphenol network environment, thus serving as a potential source of supplementary silver ions, contributing to a smoother ion release behavior and achieving long-lasting antibacterial action through ion-nano synergy. This invention utilizes the synergistic effect of silver and zinc ions to improve the physical stability of the system. By introducing a small amount of silver nanoparticles as "solid-phase nodes" in the polyphenol network, the structural stability and resistance to mechanical damage of the antibacterial system are improved without significantly increasing the total silver release.

This invention belongs to the field of food processing technology, specifically providing a method for preparing antioxidant zinc chelate peptides, comprising the following steps: inoculating a protein solution with a compound microbial agent for fermentation; the compound microbial agent includes *Lactobacillus plantarum* and *Saccharomyces cerevisiae*; after enzymatic hydrolysis and debittering of the fermentation broth, the antioxidant peptides are separated and dried to obtain the antioxidant peptides; the antioxidant peptides are dissolved in water to prepare a peptide solution, and a zinc source is added to the peptide solution to carry out a chelation reaction; the supernatant is collected, and the precipitate is collected by alcohol precipitation to obtain the antioxidant zinc chelate peptides. This method uses low molecular weight peptides prepared by dual-microbial synergistic multi-enzyme hydrolysis as chelating ligands, which chelate with zinc ions under mild conditions to maximize the preservation of biological activity, achieving a dual enhancement of chelation capacity and antioxidant activity, and achieving a unity of high chelation rate, high antioxidant activity, high stability and good flavor. The process is green, safe, and leaves no organic solvent residue, making it suitable for large-scale industrial production.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The application relates to a high-coulomb-efficiency organic electrolyte for a secondary zinc ion battery and a preparation method thereof, and a secondary zinc ion battery, wherein the organic electrolyte mainly comprises a zinc salt, a sulfolane co-solvent and a main solvent. Compared with the prior art, the electrolyte can deposit a special (002) exposed crystal surface morphology under a large current condition, realizes stable dendrite-free super-high coulomb efficiency long cycle, and the coulomb efficiency reaches 99.996%, thereby meeting the actual needs of the secondary zinc ion battery.

This invention belongs to the field of materials technology, specifically relating to a calcium-doped ammonium polyvanadate cathode material, its preparation method, and its application in aqueous zinc-ion batteries. The preparation method includes: dissolving ammonium metavanadate and anhydrous calcium chloride in deionized water, adding hydrochloric acid to adjust the pH of the solution, continuing stirring to ensure thorough mixing, subjecting the mixed solution to a hydrothermal reaction, cooling to room temperature, centrifuging and washing, and vacuum drying to obtain Ca-NVO. This material prepares Ca-NVO via a simple one-step hydrothermal method, and further reactions can further convert Ca... 2+ Ca is doped into the electrode material. 2+ The introduction of Ca can serve as an interlayer support, improving the stability of the crystal structure, and Ca... 2+ It induces the formation of oxygen vacancies, improves reaction kinetics, increases reversible capacity, effectively promotes ion diffusion and charge transfer, improves the conductivity of the material, reduces its internal resistance, and maintains the structural flexibility and stability of the material, thereby enhancing the overall performance of aqueous zinc-ion batteries.

The application discloses a water-based zinc ion battery electrolyte, a preparation method and application thereof. The water-based zinc ion battery electrolyte contains a zinc salt, ethylene glycol ether and water. The zinc salt is selected from at least one of ZnSO4, ZnCl2 and Zn(OTf)2. In the water-based zinc ion battery electrolyte, the mass content of the ethylene glycol ether is 1-20 wt%. The concentration of the zinc salt is 3M.

This invention belongs to the field of secondary utilization technology of metal resources, specifically relating to a method for treating waste liquid from electroplating zinc-nickel alloys. The method includes the following steps: S1, mixing the waste liquid from electroplating zinc-nickel alloys, oxygen, and a catalyst, and performing an oxidation reaction to obtain an intermediate liquid and nitrogen; the oxidation reaction temperature is ≥220℃; S2, adjusting the pH of the intermediate liquid to 13.0-13.5, performing a first filtration separation to obtain nickel hydroxide sludge and filtrate 1; S3, adjusting the pH of filtrate 1, performing a second filtration separation to obtain zinc hydroxide sludge and filtrate 2. This invention first degrades COD to obtain zinc and nickel ions; adjusting a specific pH value generates nickel hydroxide sludge, with zinc ions existing in the system as polyhydroxy zinc anions, achieving separation of nickel and zinc; further adjusting the pH separates zinc from the system as zinc hydroxide sludge precipitate. The operation is simple, with high separation efficiency and high purity.

This invention discloses a method for modifying an electrolyte for aqueous zinc-ion batteries and its application, belonging to the field of zinc anode protection technology for aqueous zinc-ion batteries. This invention employs a simple and efficient method, adding melamine and 1,5-naphthalenedisulfonic acid as electrolyte additives, thereby significantly improving the electrochemical performance of aqueous zinc-ion batteries. Experimental tests showed that at a current density of 1 mAh / cm², [the performance was improved]. 2 Surface capacity is 1mAh / cm 2 Under the specified conditions, the method of this invention increases the cycle life of the battery from 250 hours to 2500 hours, a tenfold increase. This technical solution is simple and effective, has broad application prospects, and provides a new solution for the commercial application of aqueous zinc-ion batteries.

The application discloses a kind of water-based zinc ion battery metal zinc negative electrode interface modification method, to solve the technical problem that too much zinc dendrite is generated on the surface of water-based zinc ion battery electrode, side reaction occurs, belongs to the technical field of energy materials.The modification method includes the following steps: zinc foil is poured into phosphoric acid solution and etched surface;Glucose and PVP are configured into aqueous solution, adjust PH, obtain solution A;AgNO3 is configured into aqueous solution, obtain solution B;Solution B is slowly dropped into solution A, black suspension is obtained, PVP and PAM are added as binder, and gelled coating material is obtained after stirring;Gelled coating material is coated on the etched zinc foil, and water-based zinc ion battery metal zinc negative electrode is obtained after drying.After modification, zinc foil can accelerate the diffusion kinetics of Zn 2+ , ensure the uniform nucleation and efficient deposition of Zn 2+ , inhibit H2 release, reduce polarization and hydrogen evolution corrosion, improve the conductivity of pole piece, and improve the cycle performance and stability of battery.

This invention discloses a method for the synergistic control and removal of organic matter in the hydrometallurgical process of zinc smelting, belonging to the field of hydrometallurgical technology. It includes the following steps: incorporating the TOC content of manganese ore powder and iron removal agent into quality monitoring and limiting content thresholds; controlling the addition amounts of flocculant, bone glue, and organic cobalt removal agent; and simultaneously adjusting the concentrations of zinc ions and soluble silicon in the supernatant to reduce liquid viscosity, thereby reducing the introduction of impurities at the source; adding activated carbon to the purification process to adsorb organic matter; and adding a waste liquid circulation filtration system to the electrolysis process, while selectively adding modified activated carbon to remove suspended solids, organic matter, colloids, and harmful impurity ions from the electrolytic waste liquid. This invention achieves three main benefits: first, it establishes a synergistic removal system for fine suspended solids, colloids, organic matter, and impurity ions; second, it increases the electrolysis current efficiency to over 90% and reduces cell voltage; and third, it improves the utilization efficiency of fresh liquid and reduces overall production costs.

This invention provides a highly adhesive, wide-temperature-range aqueous hydrogel electrolyte for zinc-ion batteries, its preparation method, and its applications. The method includes the following steps: dissolving sodium alginate in 2-morpholine ethanesulfonic acid buffer solution, adding EDC and NHS, and activating; then adding dopamine hydrochloride, undergoing an amidation reaction, dialysis purification, and freeze-drying to obtain SA-DA powder; adding gelatin and SA-DA powder to deionized water, stirring and mixing evenly, and allowing to stand; then immersing in the electrolyte and undergoing soaking treatment to obtain the final product. The electrolyte of this invention exhibits excellent interfacial adhesion and flexible mechanical properties, significantly improved electrochemical stability and cycle life, excellent wide-temperature-range adaptability and anti-drying ability, outstanding safety and biocompatibility, and a simple and highly controllable process, providing key technical support for the development of high-performance, high-safety flexible aqueous zinc-ion batteries.

This invention discloses a method for preparing porous carbon materials. First, the reactants undergo in-situ oxidative polymerization in a solution of methyl orange and ferric chloride to generate a polymer precipitate. The polymer precipitate is washed with acid and water, and dried to obtain polymer powder. Then, the polymer powder is mixed uniformly with a molten salt system in a predetermined ratio to obtain a mixture. Under an inert atmosphere, the mixture is heated to 400°C for pre-carbonization for 1-4 hours at a heating rate of 2-10°C / min, and then heated to 600-1000°C for carbonization for 1-4 hours. After the reaction is completed, residual salts are removed by washing with acid and water, and the porous carbon material is obtained after drying.

This invention provides a method for the synergistic recovery of sulfuric acid and copper and zinc from waste acid from copper strip washing, comprising the following steps: S1, waste acid pretreatment; S2, novel bipolar membrane electrodialysis separation; S3, copper-targeted precipitation separation: adding a copper-targeted precipitant to the heavy metal concentrate to form a stable precipitate, followed by filtration and washing to obtain a copper-enriched precipitate; S4, zinc sulfate preparation: adjusting the pH of the filtrate after copper precipitation separation and removing reducing impurities, then evaporating and concentrating to a solution density of 1.4-1.5 g / cm³, cooling and crystallizing, and centrifuging to obtain zinc sulfate crystals, with the mother liquor returned to the evaporation and concentration unit for recycling. This method can achieve efficient recovery and recycling of sulfuric acid, while simultaneously achieving precise separation of copper and zinc ions and the preparation of high-value products, significantly improving the resource utilization efficiency of waste acid and reducing treatment costs.

The application discloses a zinc battery negative electrode material, a preparation method thereof and a zinc ion battery. The zinc battery negative electrode material is a composite of a carbon base material and zinc nanoparticles; the carbon base material is a porous carbon material with through nano or sub-micron channels, the zinc nanoparticles are distributed in the channels of the carbon base material, the surface of the zinc nanoparticles is wrapped by a carbon network, and the carbon network anchors the zinc nanoparticles in the channels of the carbon base material. A pulse mode is adopted to alternately introduce zinc sources and carbon sources, and interval purging is performed after each introduction; in view of the unique physical and chemical characteristics of zinc, a synergistic process of "functional group guidance-pulse deposition-immediate anchoring" is designed, so that the deposition of zinc nanoparticles and the growth of the carbon network are alternately performed. The zinc battery negative electrode material can not only inhibit the growth of zinc particles in a long-term electrochemical cycle process, improve the utilization rate of zinc, but also reduce the direct contact area of zinc and electrolyte, and is helpful to inhibit the occurrence of side reactions such as hydrogen evolution.

The application belongs to the technical field of zinc-based energy storage devices, and particularly relates to a composite gel layer modified zinc metal electrode, a preparation method thereof and application thereof in zinc-based energy storage devices. Acrylamide, sodium alginate, water, N,N-methylene bisacrylamide and ammonium persulfate are mixed to obtain a mixture; the mixture is applied to the surface of a zinc metal material, and then heat treatment is performed to initiate a polymerization reaction of acrylamide, thereby obtaining an electrode semi-product; a zinc metal salt solution is applied to the surface of the semi-product to initiate a polymerization reaction of sodium alginate, thereby obtaining the composite gel layer modified zinc metal electrode. The composite gel layer modified zinc metal electrode provided by the application exhibits higher cycle stability and a longer service life when applied to aqueous zinc ion hybrid capacitors, zinc ion batteries, gel-state zinc ion capacitors and gel-state zinc ion hybrid capacitors and other energy storage devices.

This invention discloses a method for preparing a modified electrolyte for zinc-ion batteries and its application. The preparation method includes: dissolving zinc trifluoromethanesulfonate in deionized water, subjecting it to ultrasonic treatment and stirring at room temperature, adding allantoin and acetylurea, and stirring evenly in a 50°C water bath to obtain a clear and transparent modified electrolyte. This invention utilizes allantoin to construct a stable solid electrolyte interface layer on the zinc anode surface, physically blocking water molecules and inducing zinc ions to deposit oriented along the (002) crystal plane. Simultaneously, the weak coordination of acetylurea lowers the desolvation energy barrier of zinc ions, accelerating interfacial ion conduction. The synergistic effect of these two factors results in an electrolyte with high ionic conductivity, low deposition overpotential, and significantly inhibited dendrite growth, greatly improving the cycle stability and rate performance of zinc-ion batteries. This invention features a simple preparation process, controllable cost, and is suitable for large-scale applications of aqueous zinc-ion batteries.

This invention provides a zinc foil surface treatment method for inhibiting dendrite growth, comprising: immersing a zinc foil with ultrasonically cleaned surface in an acidic mixture to obtain a zinc foil with a preferred zinc (002) crystal facet under acid etching; immersing the zinc foil with the preferred zinc (002) crystal facet in a mercaptosilane coupling agent solution, and through hydrolysis, forming a nanostructured zinc-silane composite layer on the zinc foil surface; and drying the zinc foil with the zinc-silane composite layer to obtain a zinc foil that can inhibit dendrite growth. The zinc foil surface treatment method for inhibiting dendrite growth described in this invention can generate a zinc-silane composite layer and zinc with (002) crystal facet orientation on the zinc foil surface. This composite layer has a strong zinc ion adsorption capacity, which can improve ion kinetics, promote uniform zinc plating and peeling, and the preferred (002) crystal facet can induce parallel growth of zinc metal and resist electrolyte corrosion, thereby effectively inhibiting zinc dendrites and stabilizing the electrode / electrolyte interface.

The application discloses a water-based zinc ion battery electrolyte containing a chain polyether additive and application thereof, and belongs to the technical field of water-based zinc ion batteries. By adding 0.05-0.5 mol / L of an ether additive in the electrolyte of a water-based zinc ion battery, triple synergistic effects are realized: the solvation structure of zinc ions is adjusted, free water is reduced, and hydrogen evolution and side reactions are inhibited; zinc is induced to preferentially grow along a (002) crystal surface, dendrites are inhibited, and corrosion resistance is improved; and the ether additive participates in the formation of a dense and stable SEI film to block water molecules from contacting the zinc negative electrode. The electrolyte is suitable for Zn||Zn symmetric batteries, Zn||Cu asymmetric batteries and full battery systems such as Zn||vanadium-based positive electrodes, can significantly improve the cycle life and coulombic efficiency of the batteries, and has important practical value.

This invention discloses an ultra-thin, tensile-reinforced packaging film, relating to the field of agricultural packaging film technology. The film has a seven-layer co-extruded structure with a total thickness of 15–22 micrometers. It comprises an outer surface unwinding weather-resistant layer, an inner surface adhesive layer, a core layer with pinhole self-sealing in the middle, and tensile-reinforced crack-blocking layers on both sides. The core layer contains a polyisobutylene sealing phase, a dynamic ionic framework composed of a blend of sodium and zinc ionomers and unneutralized ethylene-acid copolymer, and a compatibilizer containing epoxy-based ethylene copolymers. The molar ratio of epoxy to free acid groups is 0.05–0.25, resulting in polyisobutylene forming a sealing microdomain with a median particle size of 0.3–1.2 micrometers and 90% of the particles having a diameter no greater than 2.5 micrometers. The blocking layer contains a microfibrillated reinforcing phase. Under pre-tension, the film can quickly seal pinholes and reduce oxygen intrusion, while simultaneously inhibiting the migration of the sealing phase, reducing in-roll adhesion and downtime for repairs.

The application discloses a zinc metal negative electrode with a textured zinc sulfide solid electrolyte interface layer and a preparation method thereof, and belongs to the technical field of zinc ion batteries. The negative electrode is composed of a cold-rolled zinc base and a zinc sulfide solid electrolyte interface layer. The zinc sulfide target material is bombarded by a high-energy laser beam to cause plasma state transformation and deposition on the cold-rolled zinc base. By controlling the deposition temperature and time, cavity gas pressure, laser frequency and power, a zinc sulfide solid electrolyte interface layer with a (111) texture strength higher than 2.5 and a layer thickness of 0.3-2.0 microns can be prepared, and a zinc metal negative electrode with the interface layer is obtained. In the aqueous zinc ion battery system, the negative electrode material exhibits a cycle service life of not less than 3400 times at a current density of 5 mA / cm 2 2, and a coulomb efficiency of 99.9%. The application is used for improving the cycle service life of zinc ion batteries, and has the advantages of simple and controllable process, high product stability and durability, non-toxic process, and greatly improved service life and reliability of commercial zinc ion batteries.

The application discloses a zinc-bromine flow battery diaphragm material based on silk fibroin and a preparation method and application thereof, and belongs to the technical field of electrochemical energy storage. Multiple synergistic optimization is realized through rich polar functional groups. The strong hydrophilicity improves the wettability of electrolyte, forms a uniform ion transmission interface, reduces the interface resistance and concentration polarization, and improves the energy efficiency. It can also form a coordination effect with bromine, inhibit bromine migration, and reduce self-discharge. The dense and flexible film can physically block zinc dendrite penetration, enhancing the safety of the diaphragm. At the same time, the molecular sponge structure of silk fibroin in the interface construction can guide the uniform distribution of zinc ions, promote the uniformization of current density, induce the smooth and dense deposition of zinc, reduce zinc dendrites and dead zinc, and improve the reversibility and utilization rate of the zinc negative electrode. In addition, it relieves bromine corrosion through physical barrier and chemical complexation, prolonging the service life of the diaphragm.

This invention discloses a zinc thiocate modified copper current collector for electrodeless lithium metal batteries and its preparation method. Thioctic acid and zinc acetate are dissolved in solvents, and a composite solution is prepared by the coordination interaction between zinc ions and the carboxyl groups of thiocate. This composite solution is then spin-coated onto the surface of the copper current collector to form an ordered protective coating. This invention synergistically regulates the interface through the dual functions of zinc ions: firstly, zinc ions act as divalent coordination centers, cross-linking with thiocate molecules to construct a stable and regularly arranged protective coating; secondly, zinc ions act as lithiophilic nucleation sites, reducing the lithium nucleation overpotential, inducing uniform lithium ion deposition, and significantly inhibiting lithium dendrite growth. The modified current collector of this invention achieves a synergistic improvement in interface stability and electrochemical activity, enabling the battery to possess excellent cycle life and high safety, providing a novel interface design strategy for high-performance electrodeless lithium metal batteries.

An aqueous zinc-ion electro-chemical cell may include an anode. The anode may include an electrode and an interphase layer disposed on the electrode. The interphase layer may include a non-stoichiometric tin oxide (SnOx) where 1 < x <= 1.2. The interphase layer may guide Zn²⁺ ions to plate beneath the interphase layer along the Zn (101) crystallographic orientation.

A zinc-ion secondary battery, and a method for improving the Coulombic efficiency and stable long-cycle performance of a zinc negative electrode. By means of the synergistic effect of both the surface modification of a zinc negative electrode and an additive for an electrolyte, the zinc negative electrode of a zinc-ion battery achieves a high Coulombic efficiency under large-current and long-cycle conditions. A surface modifier is a metal halide and is dissolved in a polar organic solution. The electrolyte comprises a zinc salt, a metal ion additive, and a solvent. Compared with the prior art, by means of the synergistic effect of surface alloying and the additive for the electrolyte, the cycle performance of the zinc negative electrode and the deposition morphology of zinc are significantly improved. Furthermore, the zinc negative electrode exhibits a good zinc deposition morphology and a high metallic Coulombic efficiency at a high current density and a high depth of discharge.