3results about How to "Weaken electrostatic interactions" patented technology

The invention relates to a sodium vanadium fluorophosphate positive electrode material, a preparation method and a sodium ion battery, and belongs to the technical field of sodium ion batteries. Mixing a vanadium source, a sodium source, a phosphate radical source, a fluorine source and deionized water to obtain a mixed solution; and adding a complexing precipitator into the mixed solution at a constant speed within 0.5-2 hours, then adding an anti-solvent at a constant speed within 10-90 minutes, and after the addition is finished, carrying out solid-liquid separation, washing and drying to obtain the sodium vanadium fluorophosphate positive electrode material. By optimizing the proportion and adding time of the complexing precipitant and the anti-solvent, nucleation and growth kinetics in the synthesis process are continuously improved, and finally the high-crystallinity vanadium sodium fluorophosphate material is successfully prepared under the conditions of room temperature and normal pressure. The preparation method has the advantages that the high conversion rate of the product is guaranteed, the preparation time efficiency is obviously improved, the energy consumption is reduced, the production and preparation cost is greatly reduced, and the method is suitable for industrial production.

The invention relates to the technical field of wastewater treatment, in particular to a quartz sand-based PMS catalyst and a preparation method thereof.The preparation method comprises the steps that pretreated quartz sand is put into an alkaline solution of dopamine hydrochloride, stirring reaction is conducted for 10-16 h at the room temperature, the quartz sand is separated, washing and drying are conducted with water and ethyl alcohol respectively, and quartz sand wrapped with a polydopamine layer is obtained; dissolving divalent manganese salt and cobalt salt in water to obtain a first solution, and dissolving 2-methylimidazole in water to obtain a second solution; and immersing the quartz sand wrapped by the polydopamine layer into a mixed solution of the first solution and the second solution, carrying out stirring reaction at room temperature, carrying out solid-liquid separation, washing a solid phase with water and ethanol respectively, and drying to obtain the quartz sand-based PMS catalyst. The catalyst disclosed by the invention has good separation, recovery and reutilization characteristics, and the catalytic efficiency is promoted by utilizing polydopamine, so that the degradation speed of PMS on organic matters in wastewater is greatly improved.

The application belongs to the technical field of aqueous zinc ion batteries, and particularly relates to a solution preparation method of amorphous organic hybrid vanadium oxide working electrode and application of the amorphous organic hybrid vanadium oxide working electrode in aqueous zinc ion batteries. The application dissolves the crystalline organic hybrid vanadium oxide in an organic solvent to form an organic hybrid vanadium oxide solution, and adds a conductive agent and a binder into the solution to prepare the amorphous organic hybrid vanadium oxide working electrode through concentration and drying. The amorphous hybrid vanadium oxide working electrode prepared by the application exhibits high specific capacity, good rate performance and excellent cycle stability as an energy storage electrode of aqueous zinc ion batteries.