74results about How to "Cyclic stability" patented technology

The invention relates to the technical field of lithium batteries, in particular to a composite binder aqueous solution, a silicon-based negative pole piece and a preparation method and application of the silicon-based negative pole piece. The preparation method of the composite binder aqueous solution comprises the following steps: dissolving a water-based polymer binder and a micromolecular physical crosslinking agent in water, adding pyrrole, stirring, adding an initiator, and mixing to obtain the composite binder aqueous solution. A small molecule physical cross-linking agent is introduced into the water-based polymer binder, and a large number of hydrogen bond binding sites are increased, so that the mechanical property of the binder is remarkably enhanced, and the machinability of the pole piece is further improved. Meanwhile, polypyrrole can be generated in the binder through in-situ polymerization, and the polypyrrole can be tightly coated on the surfaces of the silicon particles through strong interaction between the binder and the silicon particles to form a stable conductive network, so that the charge transfer capability of the electrode is remarkably improved. In addition, the composite binder is also beneficial to formation of a solid electrolyte layer rich in Li-N and participates in formation of a solid electrolyte interface layer, so that the lithium ion transmission capability of the composite binder is further improved.

According to the double-site doped ferric sodium pyrophosphate / carbon composite positive electrode material and the preparation method thereof, tungstate is introduced in the raw material mixing process, and the Fe site and the PO4 site are respectively occupied in the forms of W < 6 + > and WO4 < 2-> in the synthesis process; the chemical formula of the obtained double-site doped ferric pyrophosphate sodium / carbon composite positive electrode material is Na4Fe3-xWx (PO4) 2-y (WO4) y (P2O7) / C, x is greater than or equal to 0 and less than or equal to 0.3, and y is greater than or equal to 0 and less than or equal to 0.3. The invention also comprises a preparation method of the double-site doped ferric sodium pyrophosphate / carbon composite positive electrode material. According to the double-site doped ferric pyrophosphate sodium / carbon composite positive electrode material, the phase purity is greatly improved, non-active marmite type ferric phosphate sodium and low-capacity ferric pyrophosphate sodium impurity phases do not exist, and sodium-iron antisite defects in the structure are obviously reduced. The positive electrode material is good in electronic conductivity and ionic conductivity, high in specific capacity, good in rate capability and long in cycle life, and the high and low temperature performance is also remarkably improved.

The invention relates to a wide-temperature-range high-voltage electrolyte, a lithium battery and a preparation method of the lithium battery. The wide-temperature-range high-voltage electrolyte comprises a lithium salt, an electrolyte solvent, a first additive, a second additive and a third additive, wherein the first additive is fluoroethylene carbonate; the second additive is at least one of 1, 3-propane sultone and propylene sulfite; and the third additive is at least one of dimethoxy (methyl) (3, 3, 3-trifluoropropyl) silane and trimethylsilyl phosphite ester.

The invention discloses a three-dimensional porous current collector as well as a preparation method and application thereof, belongs to the technical field of a sodium metal battery current collector, and solves the problem that the electrochemical performance of a metal sodium battery without a negative electrode in the prior art is not ideal enough. The three-dimensional porous current collector comprises a copper substrate and bismuth nanosheets vertically grown on the surface of the copper substrate, wherein the copper substrate is of a net structure, and the bismuth nanosheet is of a three-dimensional honeycomb structure. The three-dimensional porous current collector provided by the invention has ultra-stable sodium deposition stripping performance and excellent long cycle stability.

The invention belongs to the technical field of solid waste recycling and organic wastewater treatment, and particularly relates to a method for treating organic wastewater by utilizing a composite material constructed by waste lithium iron phosphate to activate peroxymonosulfate. The method comprises the following steps: carrying out pyrolysis treatment on a waste lithium iron phosphate battery positive electrode material, and collecting a waste lithium iron phosphate SLFP powder material; preparing the SLFP into a uniform solution; sodium molybdate dihydrate and thioacetamide are added into the solution for a hydrothermal reaction, and a composite catalyst material SLFP-MoS2 is prepared; putting the catalyst into the wastewater to achieve adsorption equilibrium; and adding peroxymonosulfate to trigger an oxidation reaction, and removing organic pollutants in the solution. The SLFP-MoS2 catalyst provided by the invention can realize mutual promotion of Fe-Mo bimetal active sites, ensures stable circulation of iron ions and molybdenum ions in a local microenvironment, further activates peroxymonosulfate (PMS) to generate active species, and realizes effective removal of organic pollutants in wastewater.

The invention discloses a lithium-rich manganese-based battery low-voltage formation method and application thereof, and relates to the technical field of lithium batteries. The formation step is carried out after the standing step, in the low-voltage formation process, a constant-current charging mode is adopted to regulate and control the voltage to carry out formation on the battery so as to activate different lithium-rich manganese-based phases, and the activation degree of the Li2MnO3 phase in the positive electrode material is effectively controlled in the circulation process, so that the trend that the initial capacity is increased is shown, and the circulation is stable; the effect of improving the cycling stability is achieved. According to the low-voltage formation method, the gas production rate in the formation and circulation process is reduced, the capacity retention rate in the circulation process is improved, the formation time can be saved, the energy consumption of battery production is reduced, and the production efficiency is improved.

According to the local high-concentration electrolyte of the lithium metal battery capable of realizing high energy density and long cycle life as well as the preparation method and the application of the local high-concentration electrolyte, the viscosity is reduced through the 1, 1, 2, 3, 3, 3-hexafluoropropyl-2, 2, 2-trifluoroether diluent, the wettability of the electrolyte is improved, and meanwhile, the 1, 1, 2, 3, 3, 3-hexafluoropropyl-2, 2, 2-trifluoroether diluent enters a Li < + > solvation shell layer, so that the lithium metal battery can be prepared. The oxygenolysis of solvent molecules is inhibited. In addition, uniform deposition of lithium metal is promoted, a firm and stable SEI film is formed, and side reaction of the electrode and electrolyte is inhibited; the stable long circulation capability of the lithium metal battery is enhanced, 500 times of stable long circulation of the lithium metal battery at 25 DEG C can be realized under the coupling condition of an ultrahigh-load positive electrode (-20 mg / cm < 2 >) and a thin lithium negative electrode (50 microns), and the average coulombic efficiency exceeds 99.9%. The local high-concentration electrolyte enables a 500 Wh / kg lithium metal soft package battery to stably circulate for 90 times at 25 DEG C.

A preparation method and application of a zinc phosphate film, which belongs to the field of metallic zinc negative electrodes of aqueous zinc ion batteries. The present invention aims to solve the problem that the artificial protective layer constructed on the surface of the existing zinc negative electrode has uneven thickness and is difficult to reach the nanometer level, or it is difficult to control the thickness of the interface protective layer. Preparation method: Add a zinc sulfate aqueous solution into a reaction container, drip a dodecyl phosphoric acid / chloroform solution on the surface of the zinc sulfate aqueous solution, and then inject a sodium phosphate aqueous solution, let it stand at room temperature, and obtain a zinc phosphate film at the interface between air and liquid; Application: The zinc phosphate film is used as an interface protective layer of the zinc negative electrode in an aqueous zinc ion battery. The present invention is used for a preparation method and application of a zinc phosphate film.

The invention belongs to the field of batteries, and particularly relates to a phosphoryl isocyanate additive, a preparation method of the phosphoryl isocyanate additive, an electrolyte, the additive and a lithium ion battery. The structure of the phosphoryl isocyanate additive is shown as the following formula (A): # imgabs0 #, R1 is one of alkyl, alkoxy, phenoxyl, alkenyl, alkynyl, phenyl and substitutes thereof with the carbon atom number of 1-6, and R2 is one of isocyanate, alkyl, alkenyl, alkynyl, phenyl and substitutes thereof with the carbon atom number of 1-6. By adding a small amount of phosphoryl isocyanate additive into the electrolyte, a CEI structure which is relatively low in resistance and stable under a high-voltage condition is formed on the surface of a positive electrode, so that the rate capability and the high-voltage cycle stability of the battery can be improved.

The invention relates to a low-concentration electrolyte suitable for prussian blue and hard carbon sodium ion batteries. The sodium-ion battery electrolyte is prepared by mixing a sodium salt, an ester organic solvent and a cosolvent, wherein the concentration of the sodium salt in the ester organic solvent is 0.04 to 0.86 mol / L. Due to the low concentration, the overall viscosity of the electrolyte can be reduced, the wettability of the electrolyte can be improved, the diffusion coefficient of sodium ions can be increased, and the cost of the electrolyte can be reduced to a certain extent. Through the unique solvation structure of the sodium salt and the ester organic solvent, a stable inorganic-rich solid electrolyte interface film with high ionic conductivity can be constructed on the surface of an electrode material, so that the electrolyte also has excellent performance at high temperature. The electrolyte disclosed by the invention is simple in preparation method and relatively low in cost, and has a considerable industrial application prospect.

The invention belongs to the field of organic electrolytes and potassium ion batteries, and particularly relates to a low-concentration ionic liquid electrolyte for breaking the concentration balance of potassium ions and anions and a high-energy-density potassium ion battery. The potassium ion battery comprises a Prussian blue (PB) positive electrode, an electrolyte and a commercial ferrocene (Fc) negative electrode which is not subjected to any treatment, and the electrolyte is a low-concentration ionic liquid electrolyte (FSI-: K + (3.5 / 0.3 M)) of potassium bis (fluorosulfonyl) imide (KFSI). The low-concentration ionic liquid electrolyte developed by the invention has a high anion: K < + > concentration ratio (3.5: 0.3 M), increases the solvation proportion of rich anions, reduces the dissolution of an Fc organic metal compound, and ensures high interface stability and rapid K < + > storage kinetics of an Fc negative electrode. Meanwhile, the electrochemical window of the low-concentration electrolyte is widened, the PB positive electrode can stably circulate at 1.0-4.4 V, the long-period circulation and excellent rate capability of the PBFc total battery are also realized, and the total battery has the energy density of 246.7 Wh / kg under the current density of 20 mA / g.

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 present application relates to the technical field of binder, and particularly relates to a water-based binder based on coordination cross-linking of polyvalent metal ions and a preparation method and application thereof.A preparation method of a water-based binder based on coordination cross-linking of polyvalent metal ions, specifically comprising the following steps: S1, dissolving carboxymethyl cellulose sodium in water, heating and stirring to form a carboxymethyl cellulose sodium aqueous solution; S2, dissolving a metal ion compound in deionized water to obtain a metal ion compound aqueous solution; the metal ion includes divalent metal ions and trivalent metal ions; S3, slowly adding the metal ion compound aqueous solution to the carboxymethyl cellulose sodium aqueous solution in a certain amount, continuously heating and stirring for a period of time, and obtaining the water-based binder.The mechanical property of the water-based binder is obviously improved, and the battery has better rate and more stable cycle.

The application discloses a composite pyrophosphate magnesium battery positive electrode material and a preparation method and application thereof. The positive electrode material comprises a magnesium ion positive electrode material pyrophosphate and a carbon layer coated on the magnesium ion positive electrode material pyrophosphate. The chemical formula of the positive electrode material is Mg a Na b M 2+x / 2 N y , wherein M is one or more of Fe, V, Ti, Cr, Ni, Cu, Mn, Co, Nb, N is one or more of P2O7 4‑ , PO4 3‑ , SO4 2‑ , BO3 3‑ , SiO4 4‑ , 0

The invention belongs to the field of energy storage, and particularly relates to a high-performance NASICON type oxide electrolyte and a preparation method thereof. The electrolyte takes an NASICON type oxide as a matrix and contains polyoxometallate accounting for 0.1-20% wt of the NASICON type oxide, the electrolyte can effectively improve the sodium affinity and intrinsic ionic conductivity of the NASICON solid electrolyte, and the interface impedance of the prepared sodium symmetric half cell at room temperature is smaller than 20 omegacm < 2 > and is as low as 16.7 omegacm < 2 >. According to the invention, the reaction between the NASICON and the additive is more uniform by adding the polyoxometallate in situ, a uniform and stable structure is formed, and the sodium ion conductivity of the NASICON solid electrolyte is effectively improved.

The invention belongs to the field of organic electrolyte and potassium ion batteries, and particularly relates to a high-energy-density potassium ion battery realized by medium-entropy electrolyte applicable to an alloy antimony / conductive carbon negative electrode. The potassium ion battery comprises a Prussian blue (PB) positive electrode, an electrolyte and an antimony / conductive carbon (Sb / SP) negative electrode, and the electrolyte is a medium-entropy electrolyte of potassium bis (fluorosulfonyl) imide (KFSI). The obviously improved rate performance of the medium-entropy electrolyte and the Sb / SP developed by the invention is attributed to a balance solvation structure driven by a double-entropy effect and a weak solvation effect, and the structure provides a collaborative guarantee for enough interface stability and dynamic compatibility. Meanwhile, the electrochemical window of the ether-based electrolyte is widened, the PB positive electrode can stably circulate at 2.0-4.4 V, and the PBMSESb / SP total battery can achieve the high energy density of 194 Wh / kg under the current density of 50 mA / g (based on the total mass of PB and Sb / SP).

The invention relates to the technical field of batteries, in particular to a wide-temperature-range high-rate lithium battery ester-based electrolyte and application. The electrolyte comprises soluble lithium salt and a liquid component, the liquid component is a solvent; the solvent comprises at least three of propylene carbonate, fluoroethylene carbonate, isopropyl trifluoroacetate, ethyl trifluoroacetate, ethyl acetate, methyl acetate and methyl trifluoroacetate; the lithium salt lithium battery comprises at least two of common lithium salts. The electrolyte developed by the invention is used in the lithium battery and can stably work at 40-60 DEG C, the specific discharge capacity of the battery is still 62.83% of the specific discharge capacity of the battery at room temperature even at 30 DEG C and 4C multiplying power, and the electrolyte has excellent wide-temperature fast charge performance. In addition, the electrolyte effectively inhibits the growth of lithium dendrites and the side reaction of an electrode-electrolyte interface at low temperature, and promotes the formation of a solid interface film which is rich in inorganic matters and low in interface impedance. The invention has the advantages of reasonable component design and excellent product performance, and is convenient for industrial application.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

The utility model discloses rapid cooling and air-drying integrated equipment for beef and mutton, which comprises a centralized function box body and two processing chambers arranged in the centralized function box body, and a processing mechanism for respectively cooling and air-drying the beef and the mutton in the two processing chambers is arranged at the top of the centralized function box body. According to the utility model, under the interaction of the centralized function box body, the processing chamber, the processing mechanism and the separation mechanism, through the design of the centralized function box body and the independent processing chamber, the same fan is matched with the condensation assembly and the hot drying assembly, so that the integration of cooling and air drying functions is realized, and the equipment space and energy consumption are effectively saved; a circulating pipe fitting and a pressure release valve ensure stable circulation of airflow and improve the treatment efficiency; a separation mechanism can be communicated with or isolate the treatment chamber as required, so that seamless connection of cooling and air drying is realized, manual transfer links are reduced, and the risk of cross contamination is reduced; the continuity of beef and mutton processing and the quality of finished products are improved.

The invention provides a paint supply device which comprises a raw material feeding pipe, the raw material feeding pipe is connected with a paint supply pump mechanism, the paint supply pump mechanism is connected with a paint conveying pipe, the paint conveying pipe is connected with a paint box, an outer box is arranged outside the paint box, a circulating pump mechanism is arranged in the paint box, and the circulating pump mechanism is connected with the outer box. And the circulating pump mechanism is connected with the filtering mechanism through a pipeline, the filtering mechanism is connected with the connecting pipe, and a redundant paint recycling mechanism is arranged above the paint box. By arranging the redundant paint recycling mechanism, unused redundant paint flowing out can return to the paint box again after being filtered, cyclic utilization of paint is achieved, waste is reduced, cost is reduced, stable supply and circulation of the paint can be ensured by arranging the paint supply pump mechanism and the circulating pump mechanism, and the paint recycling efficiency is improved. The paint is kept in a good flowing state in the system, and the paint supply efficiency and stability are improved.

The application discloses a composite lithium-magnesium alloy negative electrode and a preparation and application thereof. After a fluorinated copolymer solution is uniformly loaded on the surface of a three-dimensional conductive framework, the three-dimensional conductive framework is combined with a lithium-magnesium alloy foil in a sandwich arrangement mode, and then the combination is obtained through mechanical rolling. The three-dimensional conductive framework material effectively reduces the size of the local current density, and can also provide sufficient accommodation space for the deposition of metal lithium. The elastic self-adaptive interface rich in LiF formed by using the fluorinated copolymer can accelerate the ion transmission at the interface and maintain the stability in a long cycle process. The lithium-magnesium alloy with the lithium affinity induces the uniform deposition of lithium ions, and the growth of dendrites is inhibited, so that the composite lithium-magnesium alloy negative electrode material with the fluorine-rich lithium elastic self-adaptive interface is constructed.

The embodiment of the invention provides a binder, a diaphragm, a secondary battery and an electric device, the binder comprises polyurethane prepared from a polymer, isocyanate and a chain extender, and the hydrogen bonding degree of the polyurethane is between 40% + / -3% and 80% + / -3%. According to the invention, the adhesion between the diaphragm and inorganic particles is relatively good by regulating and controlling the hydrogen bonding degree of polyurethane, and the cycle performance of a secondary battery formed later is relatively good.

The invention provides a preparation method of a modified current collector, which comprises the following steps: (1) adding a cationic organic matter and an inorganic metal salt into a solvent to prepare a solution; and (2) adding a current collector into the solution, carrying out a reaction, overturning the current collector at set intervals in the reaction process, and washing and drying the current collector after the reaction to obtain the modified current collector. The preparation method comprises the following steps: preparing a positively charged organic matter-lithium-loving metal composite modified three-dimensional current collector by utilizing a coordination effect of a specific metal inorganic matter and a positively charged organic matter through a one-step method; through the coordination effect of the lithium-loving inorganic matter and the cationic organic matter, the cycle performance and the stability of the metal lithium negative electrode are jointly improved, the nucleation resistance of metal lithium can be reduced, the generation of lithium dendrites is inhibited, and the safety and the cycle stability of the battery are improved.

The utility model relates to the technical field of magnetic powder drying, and discloses an energy-saving type magnetic powder drying device which comprises a drying tank body, a conical screen and a conical discharging hopper are arranged in the drying tank body, a driving column is rotationally connected into the drying tank body, and a driving motor is arranged at the bottom of the drying tank body. According to the magnetic powder drying device, the conical screen and the conical discharging hopper are arranged in the drying tank body, magnetic powder enters the drying tank body, the magnetic powder on the conical screen and the conical discharging hopper is rapidly stirred and pushed through the screen scraper, and the uniform and rapid drying effect is achieved; the inside of the drying tank body can be circularly heated and blown, heat waste is greatly reduced, the temperature can be monitored in real time by the temperature sensor, heat supply is stopped when the temperature reaches the standard, energy consumption is further reduced, and the device has the hot air circulation drying capacity and is stable in heat energy circulation, good in energy-saving effect and high in drying efficiency.

This invention discloses a method for preparing a surface-modified oxide solid electrolyte, comprising the following steps: S1: reacting an oxide solid electrolyte matrix with a bifunctional ionic liquid modifying compound in the presence of a catalyst under an inert atmosphere to obtain an intermediate of a surface-grafted ionic liquid monomer; S2: subjecting the intermediate obtained in step S1 to a free radical copolymerization reaction with an ethylene glycol divinyl ether monomer in the presence of an initiator, thereby in-situ copolymerizing the grafted ionic liquid monomer and the ethylene glycol divinyl ether monomer to form a polymer coating layer, thus obtaining the surface-modified oxide solid electrolyte. The preparation method of this invention not only eliminates interfacial side reactions through chemical bonding between the ionic liquid modifying compound and residual alkali / hydroxyl groups on the electrolyte surface, but also forms a polyionic liquid / polyether composite coating layer through in-situ copolymerization, possessing both high ionic conductivity and flexible segment characteristics, significantly reducing interfacial impedance and inhibiting lithium dendrite growth.

This invention belongs to the field of flue gas purification technology. It discloses an in-situ regenerated CO catalytic oxidation system. By designing a catalytic bed with a rotary structure and CO and VOCs catalytic reactors with independently partitioned inlet and outlet gas chambers, it can simultaneously perform catalytic oxidation and thermal regeneration of the catalyst, achieving online in-situ catalyst regeneration. This significantly improves the efficiency of flue gas purification, effectively promotes stable catalyst circulation, and ensures efficient flue gas treatment.

The invention provides an in-situ formation agent, and belongs to the technical field of lithium ion batteries, and the chemical formula of the in-situ formation agent is LiaMbNcXd, wherein M and N are respectively and independently selected from at least one of Y, La, Ta, Zr, P, Ti, Hf and Al; x is selected from at least one of F, Cl, Br, I, O and S; a is 0 to 4; b is 0 to 4; c is 0 to 4; and d is 3 to 12. Under the assistance of external conditions, the in-situ formation agent can form an electrochemically stable internal structure in situ, so that the compatibility of a solid electrolyte and a negative electrode is improved, and long-time stable circulation of an all-solid-state battery is promoted. The invention also provides a lithium symmetric battery, an all-solid-state battery and a preparation method thereof.

The present application belongs to the technical field of solid waste resource utilization and heavy metal pollution control, and relates to a method for deep and gradient separation of heavy metals in biogas residue based on microwave-induced subcritical hydrothermal and magnetic ion imprinting coupling, which comprises the following steps: providing a heat-resistant magnetic ion imprinting composite material, wherein the composite material is a core-shell structure, the inner core is ethylenediaminetetraacetic acid modified magnetic nanoparticles, and the shell is a heat-resistant ion imprinting polymer, and the heat-resistant ion imprinting polymer takes heavy metals to be deeply and gradiently separated as a template; mixing the composite material with biogas residue, then performing microwave subcritical hydrothermal treatment, and then performing magnetic separation. The method of the present application realizes efficient complexation of heavy metals and organic matter through microwave-assisted subcritical water environment, simultaneously realizes target capture of heavy metals through in-situ introduction of heat-resistant magnetic ion imprinting polymer, and finally realizes efficient separation and resource utilization of heavy metals and biogas residue components through magnetic separation.

The invention relates to the field of aqueous zinc ion batteries, a simple coprecipitation method is adopted, a basic copper nitrate protective layer is coated on the surface of a zinc anode, on one hand, the basic copper nitrate protective layer has a unique hydrophobic structure, so that H2O molecules in a solution are not easily in direct contact with Zn, a series of side reactions such as hydrogen evolution and a by-product Zn4 (OH) 6SO4. XH2O caused by H2O erosion are greatly reduced, and on the other hand, the basic copper nitrate protective layer has a unique hydrophobic structure. The uniformly distributed CNO provides more sites for Zn < 2 + > nucleation, so that Zn < 2 + > is uniformly deposited on the surface of the negative electrode in the deposition process, the'point effect 'caused by non-uniform deposition of Zn < 2 + > is effectively reduced, and the prepared CNO-Zn negative electrode has the service life of 1600 hours in a test of an assembled symmetrical battery compared with a pure zinc negative electrode, and has the advantages of high stability, high reliability and the like. In a coulombic efficiency test, a half cell assembled with a Cu foil can be circulated for 1600 cycles relative to a bare Zn electrode (190 cycles) CNO (at) Zn half cell, and the coulombic efficiency is stabilized at 99.8%. And compared with a pure zinc negative electrode, the total battery assembled with the Al-MnO2 negative electrode has higher capacity retention rate and longer service life.