1795 results about "Manganese oxide" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention relates to a habitat restoration-oriented sediment elution critical threshold evaluation method. The method comprises the following steps: introducing form classification including an exchange state, a carbonate binding state, an iron and manganese oxide binding state, an organic binding state and a residue state; a dynamic disturbance response mechanism is fused, and the elutable proportion is re-evaluated under the conditions of flow velocity, pH, oxidation reduction potential Eh and change; calculating a potential active flux index PAFI to quantify a real releasable part of the pollutants in the bottom mud; establishing pollution flux and biological response time sequence data; depicting ecological response sensitive inflection points by using nonlinear fitting; extracting an ecological function critical damage point EBCP as an ecological constraint upper limit of the elution threshold; constructing a habitat bearing factor set comprising a water body volume ratio, submerged vegetation density and benthic organism biomass; introducing a bearing feedback coefficient CFC, and dynamically correcting a pollutant critical flux value; and outputting a loadable elution flux interval for judging whether the ecological risk red line is touched or not.

The invention relates to the technical field of batteries, and discloses a preparation method of a lithium nickel manganese oxide positive electrode active material, a battery monomer, a battery device and a power utilization device. The battery monomer comprises a positive pole piece, the positive pole piece comprises a positive pole film layer, the positive pole film layer comprises a lithium nickel manganese oxide positive pole active material, in an XRD diffraction pattern of the lithium nickel manganese oxide positive pole active material, the full width at half maximum of a characteristic diffraction peak of a (111) crystal face is 0.1-0.2 degree, the full width at half maximum of a characteristic diffraction peak of a (311) crystal face is 0.1-0.2 degree, and the full width at half maximum of a characteristic diffraction peak of a (311) crystal face is 0.1-0.2 degree. And (400) the full width at half maximum of the characteristic diffraction peak of the crystal face is 0.1-0.2 degree. According to the battery monomer provided by the embodiment of the invention, lattice defects of the positive electrode active material are few, capacity fading can be delayed in the cycle process, and the cycle performance of the lithium ion battery can be remarkably improved.

The invention discloses a method for preparing a fluorescent material based on a waste NCM ternary lithium battery and application of the fluorescent material, and the preparation method of the fluorescent material comprises the following steps: disassembling the waste NCM ternary lithium battery to obtain a nickel cobalt lithium manganate waste material and preparing the nickel cobalt lithium manganate waste material into powder; impurities and part of ions in the nickel cobalt lithium manganate waste powder are removed, and manganese-containing powder is prepared; and mixing manganese-containing powder, a first perovskite fluorescent raw material, a ligand, a protective material and a solvent, heating and stirring under a vacuum condition, heating under a nitrogen atmosphere, adding a second perovskite fluorescent raw material solution into the system for reaction, and cooling after the reaction is finished to obtain the manganese-doped perovskite fluorescent material. According to the method, the efficient recycling of the waste NCM ternary lithium battery is realized, the preparation cost of the fluorescent material is reduced, the resource recycling rate is improved, the environmental pollution is reduced, and the manganese-doped perovskite fluorescent material is simple to operate when chloride ions are detected after being loaded on the carrier and can be used for field detection.

The present invention provides a catalyst-layer-equipped electrolyte membrane and an application of the same, said catalyst-layer-equipped electrolyte membrane comprising: an anode catalyst layer containing an ionomer and an anode catalyst component that is composed of iridium-containing manganese dioxide, the molar ratio of iridium to manganese in the anode catalyst component being 0.011-0.182, and the logarithm log(amount of ionomer / amount of anode catalyst component) of the ratio of the amount of the ionomer to the amount of the anode catalyst component being −1.40 to −0.46; a proton exchange membrane; and a cathode catalyst layer.

The invention relates to the technical field of gas sensors, and particularly discloses an electrochemical formaldehyde sensor electrode, a preparation method thereof and an electrochemical formaldehyde sensor. The electrochemical formaldehyde sensor comprises an electrochemical formaldehyde sensor electrode and a binary electrolyte, the electrochemical formaldehyde sensor electrode comprises a polytetrafluoroethylene film, the polytetrafluoroethylene film is coated with slurry for an electrochemical formaldehyde sensor electrode; and the slurry is formed by mixing nano manganese dioxide, platinum carbon and a Nafion solution. According to the electrochemical formaldehyde sensor, the electrode prepared from the slurry formed by mixing the nano manganese dioxide, the platinum carbon and the Nafion solution has relatively high catalytic activity, so that the sensor shows extremely high sensitivity and extremely good linearity on formaldehyde, and the electrochemical formaldehyde sensor has relatively high catalytic activity by regulating and controlling the proportion of the binary electrolyte. The electrochemical formaldehyde sensor has the advantages of high sensitivity, low cost, fast response, high detection precision and the like.

The invention discloses an electrolyte for an aqueous manganese-based battery. The electrolyte comprises an electrolyte, and the electrolyte comprises a manganese salt; the weak acid is used for regulating and controlling proton dynamic release of the positive electrode / electrolyte interface to realize on-demand supply of protons of the positive electrode / electrolyte interface; and a solvent, wherein the solvent is deionized water; the PH range of the electrolyte is 2.0-3.5, and the electrolyte can realize on-demand supply of protons of a positive electrode / electrolyte interface in the charging and discharging process of the aqueous manganese-based battery, and promotes efficient and reversible deposition and dissolution reaction of a positive active substance manganese dioxide. According to the invention, the proton on-demand supply electrolyte is constructed by utilizing dynamic dissociation equilibrium of weak acid, so that on-demand supply of protons in the MnO2 dissolving process is realized, complete electrochemical dissolution of MnO2 is promoted, and generation of'dead manganese 'is inhibited, so that the cycling stability of the battery and the utilization efficiency of active substances are remarkably improved. The invention also discloses an aqueous manganese-based battery for realizing on-demand supply of protons and application of the aqueous manganese-based battery in the field of secondary energy storage.

The invention discloses a manganese hydrogen phosphate precursor, lithium iron manganese phosphate, a preparation method of the manganese hydrogen phosphate precursor, a positive pole piece containing the lithium iron manganese phosphate, a battery containing the lithium iron manganese phosphate, and an electric device containing the lithium iron manganese phosphate. The preparation method comprises the following steps: firstly, carrying out primary precipitation reaction on soluble manganese salt and a precipitator to prepare manganese hydroxide, and then carrying out secondary precipitation reaction on the manganese hydroxide and phosphoric acid to prepare the manganese hydrogen phosphate precursor. The manganese hydrogen phosphate precursor with low impurity ion content and high yield is prepared through secondary precipitation reaction.

The invention relates to the technical field of remediation for synergistic treatment of rice field soil arsenic and greenhouse gas emission reduction, in particular to a zero-valent manganese nitrate synergistic soil remediation agent and application thereof to remediation of rice field arsenic pollution and inhibition of greenhouse effect. The invention provides a technical scheme for synergistically repairing arsenic pollution in the rice field and inhibiting the greenhouse effect based on zero-valent manganese / nitrate, an electron transfer shunt network driven by manganese circulation is constructed, a slow release reaction-dynamic regeneration-electron shunt three-in-one system is constructed, and synergistic interaction of arsenic fixation and greenhouse gas emission reduction is realized. According to the technical scheme, the potential regulation and control contradiction between arsenic fixation aerobic and carbon reduction anaerobic is successfully broken, and an innovative solution is provided for multi-target remediation of rice field soil. According to the self-sustaining circulating system, the specific surface area of the manganese oxide is stabilized at 50m < 2 > / g to 120m < 2 > / g, and the regeneration rate is gt; 95%. Experiments show that compared with a single technology, the synergistic treatment group improves the arsenic fixing efficiency to 100%, and the comprehensive emission reduction intensity of greenhouse gas reaches 76%.

An electrode structure for a solid-state or semi-solid-state battery is provided in which NCM electrode particles coated with an interphase layer and a nitrogen-containing carbon layer are disposed. [Solution] The NCM electrode particles comprise NCM (nickel-cobalt-manganese oxide) particles (15), primary particles (30) that coat the outer surfaces of the NCM particles, an interphase layer (16) that includes a glass phase layer (241) and a plurality of ceramic particles (242), and a nitrogen-containing carbon layer (35) that coats the exterior of the primary particles. Nitrogen-doped carbon molecules in the nitrogen-containing carbon layer aid in the conduction of electrons and lithium ions, modifying the electrical potential of the NCM particles. The nitrogen-containing carbon layer is formed by coating the surfaces of the primary particles with a nitrogen-containing polymer material and calcining the material in an inert atmosphere. Conjugated bonds are formed between the carbon and nitrogen, modifying the energy band structure, reducing the energy required for electrons to transition to the conduction band, and improving overall electronic conductivity.

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method and application thereof. The method comprises the following steps: mixing manganese metal and iron metal, heating, melting and uniformly mixing in an inert gas atmosphere, and grinding into powder; adding an ammonium salt solution, continuously adding the ground manganese-iron alloy powder under heating to form a suspension, introducing compressed air and stirring, reacting, filtering, washing, drying, crushing and grinding to obtain a manganese-iron oxide precursor, feeding the manganese-iron oxide precursor, a lithium source, a phosphorus source and doped metal elements into pure water, adding a carbon source, mixing to form a suspension, and grinding and drying to obtain the lithium-phosphorus-doped manganese-iron composite material. And carrying out carbon thermal reduction in an inert gas atmosphere, and crushing to obtain the lithium manganese iron phosphate positive electrode material. The ferromanganese oxide precursor prepared by heating the metal manganese and the metal iron to a molten state and mixing the metal manganese and the metal iron realizes uniform dispersion of the manganese and the iron at an atomic level, avoids the problems of nonuniform mixing of the manganese and the iron and dissolution of the manganese, and improves the conductivity and the electrochemical performance of the material.

The embodiment of the invention provides a lithium nickel manganese oxide composite material and a preparation method thereof, a positive plate and a battery. The lithium nickel manganese oxide composite material comprises an inner core and a shell coating at least part of the surface of the inner core, the inner core comprises a lithium nickel manganese oxide material, and the shell comprises a spinel phase oxide. According to the invention, the coating layer comprising the spinel phase oxide is formed on the surface of the lithium nickel manganese oxide, so that a stable ion transmission interface is obtained, and the obtained lithium nickel manganese oxide composite material has structural stability and high rate performance under high voltage.

The invention discloses a lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, a positive electrode active material in the positive electrode comprises a positive electrode core and a solid electrolyte coated on a part of the surface of the positive electrode core, and a conductive agent is coated on an area, which is not coated by the solid electrolyte, of the positive electrode core; the positive electrode core comprises at least one of nickel cobalt manganese layered oxide, nickel cobalt aluminum layered oxide or lithium nickel manganese oxide; the electrolyte comprises a solvent, a lithium salt and a film-forming additive, the solvent comprises a low-viscosity solvent, the viscosity mu of the low-viscosity solvent at 25 DEG C is smaller than or equal to 0.6 cp, and the mass ratio of the film-forming additive in the electrolyte is larger than or equal to 3%; 0 < (mu / x) * (1-m) < 2 > < = 0.85. According to the lithium ion battery disclosed by the invention, the high energy density and the fast charging performance of the battery cell are considered on the whole, and the lithium ion battery also has good high-temperature circulation and storage performance.

The invention discloses a method for preparing high-purity manganese sulfate and co-producing manganese dioxide for a battery by reducing manganese oxide ore with sulfur dioxide, metal smelting SO2-containing flue gas or sulfur acid-making industry SO2 gas is used as a reducing agent, discharged tail gas after absorption can be as low as 30 mg / m < 3 > or below, and the leaching rate of manganese element can reach 98% or above. By adopting the technical scheme of the process, the comprehensive recovery rate of manganese is easy to achieve more than 95%, and two high-value products of high-purity MnSO4 and MnO2 for batteries are produced; s2O6 < 2-> is decomposed and removed in the same reaction kettle by adopting a high-temperature oxidation process to obtain a manganese sulfate solution and co-produce a high-quality MnO2 product suitable for batteries; a speed-controlled crystallization method is adopted for high-temperature crystallization, the one-time crystallization separation and purification rate of impurity ions such as magnesium, calcium, potassium and sodium is stably increased from 70-80% to 90% or above, and the purpose of obtaining a battery-grade high-purity manganese sulfate product through two times of recrystallization is achieved.

The invention discloses a high-performance lithium-rich manganese oxide positive electrode material, a preparation method thereof and application of the high-performance lithium-rich manganese oxide positive electrode material to an all-solid-state battery. The lithium-rich manganese oxide positive electrode material coats / composites a lithium-rich manganese positive electrode base material and a lithium ion conductor or a conductive agent in situ through a freeze-drying method. In-situ coating / compounding of a lithium ion conductor or a conductive agent on the lithium-rich manganese oxide positive electrode material is realized through freeze drying, the interface impedance is effectively reduced, the interface stability is improved, and the lithium ion and electron transmission efficiency is improved. The lithium-rich manganese oxide positive electrode material prepared by the invention can inhibit the release and side reaction of lattice oxygen in the cycle process, and improve the structural stability and cycle life of the material; meanwhile, the freeze-drying method can maintain the nano dispersity and uniformity of the material, full solid-solid contact between the lithium-rich manganese material and a lithium ion conductor or a conductive agent is realized, and the high specific capacity of the lithium-rich manganese positive electrode material in all-solid-state battery application is ensured. The prepared lithium-rich manganese-based all-solid-state battery has the reversible specific capacity as high as 273 mAh / g, the bottleneck that the capacity release of the lithium-rich manganese oxide positive electrode material in an all-solid-state battery system is limited is broken through, the strategy provides a new design thought and technical path for the construction of the high-specific-energy all-solid-state battery positive electrode material, the adopted process is simple and controllable, and the method is suitable for industrial production. The method is suitable for large-scale preparation.

The present application belongs to the technical field of gaseous arsenic adsorption, and particularly relates to a sulfur-tolerant gaseous arsenic adsorption material, a preparation method and application thereof. Manganese oxide and an iron source are mixed and placed in a ball mill jar, then the ball mill jar is sealed, argon is filled into the jar, and the iron-modified manganese oxide adsorption material is obtained by ball milling. The addition of iron improves the sulfur tolerance of manganese oxide, so that the adsorbent still has high gaseous arsenic adsorption capacity under high-concentration SO2 conditions, and is suitable for the removal of gaseous arsenic in typical high-SO2 flue gas, i.e. non-ferrous smelting flue gas. The preparation method is simple, the cost is low, the gaseous arsenic adsorption capacity is large, and the present application has a wide application prospect.

A fungus having manganese oxidation capacity is provided. The fungus can oxidize Mn2+ in a water body into a water-insoluble manganese oxide; and the Mn2+ oxidizing fungus is Cladosporium sp. XM01 strain with the accession number of CGMCC NO. 21083. The Cladosporium sp. XM01 strain is used to oxidize Mn2+ in a natural water body, and has stable operation within a range of room temperature (15-30° C.) and a range of neutral pH (6.0-7.5) and high Mn2+ oxidation efficiency; moreover, the XM01 strain may oxidize Mn2+ cyclically, thereby achieving the in-situ remediation of water bodies or soils polluted by heavy metals or trace organic substances. The manganese oxides generated through oxidization in the growth process of the strain have a good application potential in sewage treatment, water environment restoration, soils and other fields.

The invention provides a negative electrode active material and a preparation method thereof, a negative electrode for a sodium ion battery, the sodium ion battery and an electric device. The negative electrode active material comprises a nitrogen-doped carbon sphere matrix and manganese monoxide embedded into the nitrogen-doped carbon sphere matrix, the average particle size of the manganese monoxide is 1.5 nm to 2.5 nm. In the negative electrode active material, the quantum-dot-level MnO is embedded into the nitrogen-doped carbon sphere matrix, so that a tight embedded structure (non-surface loading) of the quantum-dot-level MnO and the nitrogen-doped carbon spheres can be realized, volume expansion when sodium ions are embedded and removed is effectively relieved, and an efficient electron / ion transmission channel is provided. Meanwhile, the quantum dot-level MnO has a larger specific surface area, and provides more adsorption sites with the nitrogen-doped carbon, so that the composite material shows a pseudocapacitance-dominated sodium storage behavior, and is endowed with ultrahigh rate capability and ultra-long cycle life.

The invention discloses a preparation method of an in-situ nano manganese dioxide and zeolite composite material and application of the composite material in removal of metal ions and micropollutants in water, and belongs to the field of drinking water source water treatment. The preparation method of the in-situ nano manganese dioxide and zeolite composite material comprises the following steps: 1, pretreating natural zeolite; 2, preparing acid-treated zeolite; and 3, preparing the in-situ nano manganese dioxide and zeolite composite material. According to the invention, an impregnation-calcination method is adopted, MnO2 is loaded in situ on the pore channels and the surface of the acid-treated zeolite, and uniform growth of nanometer and sub-nanometer layered manganese dioxide is realized based on the nanometer pore channel structure of the zeolite. According to the structure, the reactivity of various oxidants represented by monopersulfate is stimulated, macromolecules and background substances with the same electric property are excluded through the confinement effect, interference of non-target objects on the oxidation process is reduced, and a new thought and technical support are provided for solving the problem of combined pollution of drinking water.

The invention provides a secondary battery and an electronic device, the secondary battery comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive pole material layer, the positive pole material layer comprises a positive pole active material, and the positive pole active material comprises a manganese-containing material; the manganese-containing material comprises at least one of lithium manganate, lithium iron manganese phosphate, a lithium-rich manganese-based material or nickel cobalt lithium manganate. The negative pole piece comprises a first additive, the first additive comprises at least one of carboxylate, sulfonate or a metal organic framework compound, carboxylate comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate, sulfonate comprises at least one of sodium benzenesulfonate, sodium dodecyl benzene sulfonate or sodium methanesulfonate, and metal organic framework compound comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate. The metal organic framework compound is prepared from at least one of Zn (C4H7N2) 2, C48H28O32Zr6 or C14H16N2O8Mg2. The invention further discloses a preparation method of the metal organic framework compound. The secondary battery meets the characteristics, and the cycle performance of the secondary battery can be improved.

The application provides a lithium ion battery and an electric device, the lithium ion battery comprising a positive electrode sheet and an electrolyte, an active substance in the positive electrode sheet comprising a phosphate lithium positive electrode material and a lithium nickel cobalt manganese oxide, the electrolyte comprising a positive electrode film former, a negative electrode film former and a lithium salt, the lithium salt comprising lithium hexafluorophosphate and a lithium bisfluorosulfonylimide salt, the lithium ion battery satisfying the following formula: wherein NL is a mass ratio of the lithium nickel cobalt manganese oxide and the phosphate lithium positive electrode material, S alt is a value of a molar concentration of the lithium hexafluorophosphate and the lithium bisfluorosulfonylimide salt in the electrolyte in mol / L, and A dd is a mass ratio of the positive electrode film former and the negative electrode film former. The application can adjust the ratio of the positive electrode film former and the negative electrode film former and the ratio of the high-heat-resistance lithium salt according to the mixing ratio of the ternary material doped in the lithium manganese iron phosphate or the lithium iron phosphate, so that the cycle performance of the battery is improved.

The invention provides a high-safety lithium ion battery and a preparation method thereof, and belongs to the technical field of lithium batteries. The battery comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the positive plate comprises a positive current collector and a coating which is arranged on the surface of the positive current collector and contains a positive active material, and the negative plate comprises a negative current collector and a coating which is arranged on the surface of the negative current collector and contains a negative active material. The positive active material comprises a composition of three or more of lithium manganese iron phosphate, lithium-rich manganese base, nickel cobalt lithium manganate and lithium iron phosphate, the chemical formula of the lithium manganese iron phosphate is LiMnxFe (1-x) PO4, x is more than 0.4 and less than 0.7, the chemical formula of the lithium-rich manganese base is yLi2MnO3. (1-y) LiMO2, y is more than 0.2 and less than 0.6, and M is Ni or Mn. According to the invention, high energy density and long circulation are realized, and at the same time, higher safety and excellent needling performance are achieved.

The invention discloses a positive electrode composite material and a preparation method thereof, a positive electrode plate and a battery, and belongs to the technical field of batteries. The positive electrode composite material provided by the embodiment of the invention comprises an inner core, a buffer layer and a shell which are sequentially coated from inside to outside, the inner core comprises lithium manganese iron phosphate, the shell comprises lithium nickel cobalt manganese oxide, the Fermi level of the material of the buffer layer is between the Fermi level of the lithium manganese iron phosphate and the Fermi level of the lithium nickel cobalt manganese oxide, and the molar ratio of the Mn element to the Fe element in the inner core conforms to the decreasing trend in the direction from inside to outside. The material can reduce the interface impedance and the interface side reaction degree, thereby improving the rate capability and cycle life of the battery.

The invention relates to the technical field of battery design and manufacturing processes, in particular to an all-solid-state battery based on a 3D printing technology and a preparation method, and the all-solid-state battery comprises a positive electrode, a negative electrode, a solid electrolyte and a current collector; a positive electrode is composed of lithium cobalt nickel manganese oxide and the like, and a novel conductive agent and a multifunctional modifier are added; the negative electrode is made of a silicon-tin-carbon composite material and the like; the solid electrolyte contains components such as lithium, lanthanum, zirconium, tantalum and oxygen; the current collector is alloy foil and is plated with a specific film, and the material proportion and characteristics of all parts are clear. The unique material formula improves the battery performance, and enhances the energy density and cycle stability; the structure is accurately controlled through the 3D printing technology, and the production efficiency and the battery consistency are improved; the solid electrolyte guarantees safety, reduces hidden dangers, and is beneficial to wide application in multiple fields.

The invention relates to an organic eutectic salt modified, regenerated and repaired waste lithium nickel cobalt manganate positive electrode material and a method, and the method comprises the following steps: uniformly mixing the waste lithium nickel cobalt manganate positive electrode material, an aluminum doping source and an organic eutectic salt to obtain mixed powder; the organic eutectic salt is a mixture of lithium hydroxide, lithium nitrate and lithium salicylate; carrying out primary calcination on the mixed powder, cooling, washing and drying to obtain a primary calcined material; and adding a lithium supplement agent into the primary calcined material, uniformly mixing, and carrying out secondary calcination to obtain the regenerated nickel cobalt lithium manganate positive electrode material. According to the method, the characteristics of high lithium ion concentration and low melting point of the organic eutectic salt are utilized, meanwhile, the organic eutectic salt can be used for modifying, regenerating and repairing the waste lithium nickel cobalt manganese oxide positive electrode material under the matching action of the aluminum doping source, and the method is simple, short in process, easy in raw material obtaining and suitable for industrial application; the regeneration effect is excellent, the initial capacity of the regenerated material is high, and the cycling stability is excellent.

The invention belongs to the technical field of nano-enzymes, and particularly relates to a CuPH (at) KMO composite nano-enzyme material as well as a preparation method and application thereof. Aiming at the problems of poor catalytic activity, complex steps, high raw material cost and low biocompatibility of nano-enzyme prepared by the existing method, the preparation method comprises the following steps: by taking terephthalic acid and histidine as dual-coordination copper-based nano-enzyme as a precursor, introducing manganese oxide in situ under a hydrothermal condition; and the flower-like nano mimic enzyme which is uniform in size and has high laccase-like catalytic characteristics at the same time is synthesized. The composite nano-enzyme provided by the invention can catalytically oxidize phenol amine organic compounds under the condition that the pH value is 3-9, can realize the detection of the content of ergothioneine in cosmetics and nutritional supplement capsules, and can be applied to the field of cosmetic and food safety monitoring.

The invention provides an Al-Nb co-coated ternary positive electrode material and a preparation method and application thereof, and belongs to the technical field of ternary lithium ion battery nickel cobalt lithium manganate positive electrode materials, the Al-Nb co-coated ternary positive electrode material comprises a ternary positive electrode material and a coating layer, the surface of the ternary positive electrode material is coated with the coating layer, the chemical formula of the ternary positive electrode material is LiNixCoyMn1-x-yO2, x is larger than or equal to 0.8 and smaller than 0.95, y is larger than 0, and y is larger than 0. 1-x-y is not equal to 0, the coating layer comprises Al2O3 and LiNbO3, and the mass ratio of Al2O3 to LiNbO3 is 1: (1-0.4). According to the invention, the Al2O3 coating layer can be used as a barrier, so that direct contact between the nickel-cobalt-manganese ternary positive electrode material and an electrolyte is effectively reduced, possible side reactions are inhibited, and transition metal ions in the nickel-cobalt-manganese ternary positive electrode material are prevented from being dispersed into the electrolyte; liNbO3 has relatively high Li < + > conductivity, and as a nickel-cobalt-manganese ternary positive electrode material coating layer, the LiNbO3 can effectively improve the transmission efficiency of lithium ions, improve the electrochemical performance of the positive electrode material, enhance the interface stability and improve the high temperature resistance at the same time.

The invention provides a new energy automobile battery flexible disassembling adhesive and a preparation method thereof, and belongs to the technical field of new energy automobile batteries, the flexible disassembling adhesive comprises the following components by weight: 45-50 parts of deionized water; 8 to 10 parts of gamma-butyrolactone; 5 to 8 parts of propylene glycol methyl ether acetate; 2 to 3 parts of microencapsulated lipase; 2 to 3 parts of nano cellulose immobilized protease; 6 to 8 parts of urea peroxide; 0.5 to 1 part of nano manganese dioxide; 0.7 to 1.1 parts of a sodium citrate / sodium lactate buffer solution; 1.5 to 2.5 parts of polyvinylpyrrolidone K30; 0.8 to 1.2 parts of hydroxypropyl methyl cellulose; 0.05 to 0.1 part of a graphene oxide nanosheet; 0.5 to 0.8 part of a benzotriazole derivative; 0.1 to 0.3 part of sodium molybdate; 6 to 8 parts of sorbitol; and 5-7 parts of ascorbic acid. The flexible disassembly adhesive solves the problems of low efficiency, serious environmental pollution, high safety risk and low material recovery rate in traditional battery disassembly.

The present disclosure provides at least one of an iridium-containing manganese oxide that exhibits high oxygen-generating electrode catalytic activity in a water electrolysis method, a catalyst that contains the same, an electrode that contains the catalyst, and a water electrolysis method that uses the electrode. With respect to the iridium-containing manganese oxide according to the present invention, the molar ratio of iridium to manganese is not less than 0.001 but 0.250 or less. In one embodiment, the manganese oxide is manganese dioxide that has a β-type crystal structure. In another embodiment, the ratio of the lattice constant in the a-axis direction to the lattice constant in the c-axis direction is not less than 1.420 but less than 1.521.

The invention belongs to the technical field of zirconite porous ceramics, and discloses a method for preparing high-strength zirconite porous ceramics by a foaming injection-coagulation method, which is characterized in that zirconite powder, yttrium oxide powder and manganese oxide powder are used as raw materials, and the foaming injection-coagulation method is adopted to prepare the zirconite porous ceramics. The zirconite porous ceramic is obtained through the steps of syrup solution preparation, ceramic powder premixing, ceramic slurry preparation, injection molding gelling, sintering treatment and the like. The foaming gel casting method is adopted, so that the porosity of the zirconite porous ceramic can be effectively increased, and the heat radiation transmission efficiency is reduced; saccharide is used as a solution medium instead of water, so that the sintering surface is increased and the strength of the porous ceramic is improved; the manganese oxide and the yttrium oxide are added, so that the merging and growing process among zirconite crystal grains is accelerated, the crystal form of zirconium oxide is stabilized at high temperature, cracks caused by crystal form transformation are avoided, the strength of the zirconite porous ceramic is further improved, and the prepared zirconite porous ceramic is stable in high-temperature performance, high in strength and low in heat conductivity coefficient.