7results about How to "Reduce transfer resistance" patented technology

The invention relates to the technical field of waste battery recovery, and particularly discloses a direct regeneration method of a high-performance waste lithium iron phosphate battery material. The materials comprise waste lithium iron phosphate, lithium carbonate, soluble salt corresponding to magnesium or titanium, graphene, a glucose reducing agent, an adaptive organic solvent and the like; the method comprises the following steps: pretreating the waste battery, calcining to prepare an oxidation precursor, respectively preparing an ion dopant solution and a graphene dispersion liquid, sequentially mixing the raw materials, carrying out wet ball milling, drying and inert atmosphere preheating, and synchronously carrying out oxidation precursor reduction, ion doping and graphene compounding through high-temperature reduction. The regenerated lithium iron phosphate material can be used in the fields of electric vehicle power batteries, high-end energy storage systems and the like, and has the advantages of excellent electrochemical performance, structural stability and compaction performance; the method provided by the invention has the advantages of controllable operation, flexible raw material adaptation and high-valued recovery of waste materials, and can effectively improve the performance shortages existing in the traditional process.

The application discloses a kind of Pt nanoparticle load Fe-based MOF photocatalyst and its preparation method and application, belong to environmental energy technical field.The preparation method disclosed in the application uses 2-amino terephthalic acid, FeCl3·6H2O and aqueous solution of chloroplatinic acid hexahydrate as raw material, through hydrothermal reaction, Pt nanoparticle is dispersed in situ and loaded NH2-MIL-101 (Fe), reduces interface charge transfer resistance, inhibits the recombination of photo-generated carriers, to further improve the photocatalytic nitrogen fixation activity, using the synergistic effect of NH2-MIL-101 (Fe) composite photocatalyst containing Pt nanoparticle to achieve the purpose of improving the yield of photocatalytic conversion of nitrogen to ammonia, significantly solve the high energy consumption and environmental pollution problem of traditional industrial nitrogen fixation Haber-Bosch method.

This invention belongs to the field of nanoenzyme technology, specifically relating to a method for preparing gold magnetic nanoenzymes and a method for enhancing their catalytic activity. Citric acid is added to an aqueous dispersion of Fe3O4 and mixed to obtain citric acid-modified magnetic Fe3O4 nanoenzymes. The citric acid-modified magnetic Fe3O4 nanoenzymes are then added to a solution containing a reducing agent and mixed to obtain a dispersion. A gold-containing compound is added, and the mixture is heated to its boiling point until the solution changes from black to brownish-yellow. The solution is then centrifuged, washed, and magnetically separated. The resulting brownish-yellow substance is redispersed in water to obtain a gold magnetic cascade nanoenzyme. The prepared gold magnetic cascade nanoenzyme possesses cascade catalytic reaction activity.

The invention belongs to the technical field of capacitors, and discloses a ferro-nickel Prussian blue supercapacitor electrode material, a preparation method thereof and a supercapacitor, and the preparation method comprises the steps: dissolving nickel chloride hexahydrate, ferric trichloride hexahydrate and trisodium citrate dihydrate in water to obtain a reagent A, and dissolving potassium ferricyanide in water to prepare a solution to obtain a reagent B; slowly dropwise adding the reagent B into the reagent A at room temperature, stirring, standing the mixed solution at room temperature, washing, centrifuging, collecting precipitate, and performing vacuum drying to obtain a ferro-nickel Prussian blue material PBA; according to the invention, by adjusting the use amount of trisodium citrate and the ratio of nickel to iron, the effect of giving consideration to both high specific capacitance (140.25 Fg <-1 >) and cycle stability (retention rate after 2000 cycles is 84.35%) is achieved, and by adjusting the synergistic effect of the use amount of trisodium citrate and the ratio of nickel to iron, the structural stability and oxidation-reduction activity of the material can be effectively enhanced; and finally, the balance between high specific capacitance and excellent cycling stability is realized.

This invention belongs to the field of wastewater treatment technology, specifically relating to a Ti3C2T x / / HEP catalyst, ozone composite catalytic packing material, its preparation method and application. The catalyst is composed of MXene sheet support and high-entropy perovskite oxide, and its preparation method is as follows: Ti3C2T x The metal salt is added to the solvent and stirred to obtain a mixture; then the ligand solution is added and stirred to form Ti3C2T. x / MOFs wet gel was dried under multi-gradient vacuum drying to obtain dry gel, which was then ground into powdered precursor; the precursor was calcined under an inert atmosphere and cooled to obtain Ti3C2T x / / HEP catalyst. The ozone composite catalytic packing material of this invention has advantages such as fast electron transfer rate, abundant active sites, high catalytic stability, and low metal leaching, and can be widely used in various industrial wastewaters for the degradation of organic matter.

The application of binaphthyl Salen cobalt molecular catalyst modified BiVO4 photoanode belongs to the field of photoelectrocatalysis technology and organic synthesis cross. BiOI film is deposited on FTO conductive glass by electrochemical deposition method, and then is converted into BiVO4 photoanode substrate by calcination; 3-hydroxy substituted binaphthyl Salen cobalt molecular catalyst CoL is synthesized; CoL is loaded on the surface of BiVO4 by cyclic voltammetry electrodeposition to obtain a hybrid photoanode. The photoanode is applied to the photoelectrocatalytic olefin epoxidation reaction, water is used as oxygen source, and acetone-water is used as electrolyte. The strong interface coupling between the catalyst and BiVO4 is strengthened by the electrodeposition of the molecular catalyst strategy, and the interface charge transport efficiency, reaction conversion rate and selectivity are improved. The conversion rate of styrene reaches 99%, the selectivity of epoxide reaches more than 90%, and the stability is excellent. The application provides a new way for green and efficient synthesis of epoxide, and has wide application prospect.

This invention belongs to the field of water treatment technology, specifically disclosing a Fenton-like composite catalyst, its preparation method, and its application. The Fenton-like composite catalyst is prepared from the following components in parts by mass: 10-25 parts high-entropy spinel, 60-80 parts carbon support, 8-15 parts binder, and 1-2 parts pore-forming agent. The high-entropy spinel is a composite material composed of transition metal doped cobalt. The high-entropy spinel in this catalyst regulates the Co content through high-entropy configuration. 3+ The transition from low-spin to high-spin enhances the hybridization of Co 3d-O 2p orbitals, enabling ring-opening and chain breaking of pollutants such as benzene rings and heterocyclic rings. This invention's Fenton-like composite catalyst, used as a catalytic packing material in a fixed-bed reactor to remove pollutants from wastewater, constructs a gradient oxidation process. This allows different types of active species to synergistically cooperate within each gradient region, thereby achieving highly efficient degradation of various types of pollutants and significantly improving the utilization efficiency of reactive oxygen species.