5results about How to "Strong complexing ability" patented technology

The application relates to the field of new energy material preparation technology, and particularly discloses a method for synthesizing manganese iron phosphate from phosphating slag and application of the manganese iron phosphate in a positive electrode material. The method for synthesizing manganese iron phosphate from phosphating slag comprises the following steps: S1. Taking phosphating slag to detect the manganese and iron contents, dissolving the phosphating slag in concentrated phosphoric acid to obtain clear filtrate A; S2. According to the manganese and iron contents measured in S1, a divalent manganese salt and a ferrous salt are weighed and added into the filtrate A to obtain filtrate B; S3. A soluble zinc salt and a complexing agent are added into dilute phosphoric acid to configure a bottom solution; S4. The filtrate B is slowly added into the bottom solution to obtain manganese iron phosphate precipitate; and S5. Manganese iron phosphate powder is obtained. The manganese iron phosphate powder synthesized from the phosphating slag is used as raw material, mixed with lithium carbonate and glucose, pure water is added, sand grinding is carried out, spray drying is carried out, and sintering is carried out under the protection of a nitrogen atmosphere to obtain a manganese iron lithium phosphate positive electrode material, and the problems of low resource utilization efficiency of the phosphating slag and poor synthesis effect of the manganese iron phosphate are solved.

The application relates to a preparation method of a sodium ion battery positive plate, and belongs to the technical field of new energy batteries. The specific scheme comprises the following steps: step one, uniformly dispersing Prussian blue positive materials and organic solvents to obtain slurry A; the organic solvents comprise a combination of one or more of N-methyl pyrrolidone, polyvinyl pyrrolidone and nitriles; step two, adding a binder into the slurry A and uniformly stirring to obtain slurry B; step three, adding a conductive agent into the slurry B and uniformly stirring to obtain slurry C; removing bubbles from the slurry C and adjusting the viscosity to obtain slurry D; step four, coating the slurry D on a positive current collector, baking, rolling, cutting and obtaining the sodium ion battery positive plate. The application can prevent subsequent glue liquid from entering Prussian blue cavities, can effectively guarantee the adhesive glue amount attached to the surface of active materials, can prevent positive electrode cold pressing and formation demolding, and can solve the problem of the battery cell manufacturing process.

The invention provides a method for preparing nano calcium carbonate through amine cycle by capturing carbon dioxide through ferronickel slag, and belongs to the technical field of waste resource utilization and carbon dioxide capture and utilization. The method comprises the following steps: mixing ferronickel slag powder with an ammonium chloride solution, and performing leaching reaction to obtain a mixed solution; adding ammonium hydroxide into the mixed solution to adjust the pH value, and filtering to obtain a leaching solution; introducing the flue gas into an ammonia water absorption tower to prepare an ammonium bicarbonate solution; the ammonium bicarbonate solution and the leachate are subjected to a carbonization reaction, nano calcium carbonate is obtained, ammonia gas generated by the carbonization reaction is recycled to an absorption tower to be reused, and a closed amine circulation system is formed. According to the amine circulation method, efficient utilization of CaO in the ferronickel slag can be achieved, meanwhile, CO2 in the flue gas is captured, the purity of obtained nano calcium carbonate is larger than or equal to 93%, the whiteness is larger than or equal to 94%, the nano calcium carbonate has the advantages of being small in particle size, good in dispersity and high in additional value, and cooperative utilization of high-additional-value recycling of the ferronickel slag and carbon dioxide emission reduction is achieved.

The application relates to the technical field of supramolecules, in particular to a pillar[n]arene derivative-DCOIT slow-release supramolecular self-assembly body, application and a preparation method. The supramolecular self-assembly body loads DCOIT by taking a pillar[n]arene derivative as a molecular carrier; the pillar[n]arene serving as the carrier can form a supramolecular assembly body with DCOIT through hydrogen bond interaction between pi and CH2, the host-guest complexation of the two is strong, and the pillar[n]arene derivative can effectively control the slow release of DCOIT; the supramolecular self-assembly body is good in safety and stability, low in cost, beneficial to industrialized production, and wide in application field; the method is simple in operation, low in preparation cost, easy to realize, and beneficial to industrial promotion.

The application provides an electrolyte, a lithium ion battery and a power device, the electrolyte comprising a solvent, a lithium salt and an additive; wherein the solvent comprises a fluoroether, a carbonate compound and a carboxylic acid ester compound, and the mass ratio of the fluoroether, the carbonate compound and the carboxylic acid ester compound is (10-20):(40-65):(20-45); and the additive comprises a first additive, and the first additive is a tetranitrile compound as shown in formula I. Compared with the prior art, the electrolyte of the application adds the fluoroether in the solvent, so that a SEI film with better toughness can be formed on the metal lithium negative electrode side, thereby improving the stability of the metal lithium negative electrode interface; meanwhile, the tetranitrile compound is also added as the additive, which can effectively improve the stability of the positive electrode, and cooperates with the fluoroether to effectively balance the transmission rate of lithium ions, effectively improves the lithium dendrite problem prone to occur in the metal lithium negative electrode system, and thereby improves the cycle life and safety performance of the battery.