8results about "Phosphorus oxyacids" patented technology

A positive electrode material for a lithium-ion secondary battery includes granulated bodies 10 each having a core 11 and a carbon coating 12. The core 11 is made of olivine-type lithium manganese iron phosphate represented by a general formula LiMnxFeyPO4 ("x" and "y" are numerical values satisfying "x + y = 1", "0 < x < 1", and "0 < y < 1"). The carbon coating 12 is formed on a surface of the core 11. The core 11 has a structure in which primary particles of the olivine-type lithium manganese iron phosphate are aggregated. The primary particles have a particle size of 100 nm or less. The granulated bodies 10 have a pore volume of 0.2 cm3 / g or less in a pore size range of 2 nm to 300 nm, inclusive. The granulated bodies 10 have a carbon content of 1.8 mass% or greater and 3.0 mass% or less.

The application provides a lithium-containing nickel-manganese composite oxide, a preparation method thereof, a positive electrode sheet containing the lithium-containing nickel-manganese composite oxide, a secondary battery and an electric device, and the lithium-containing nickel-manganese composite oxide has a core-shell structure, comprising an inner core and a shell coated on the surface of the inner core, the inner core comprises Li x (Ni y Mn 2‑y ) 1‑m M m O4, M comprises one or more selected from Mg, a fourth sub-group element to a sixth sub-group element, a third main group element to a fifth main group element and a lanthanide series element, 0.95≤x≤1.10, 0.40≤y≤0.60, 0.001≤m≤0.015, and the shell comprises aluminum lithium phosphate and optionally comprises aluminum lithium phosphate and aluminum phosphate. The lithium-containing nickel-manganese composite oxide provided by the application can make the secondary battery simultaneously have high energy density, good cycle performance and storage performance and low gas production.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

The invention belongs to the technical field of electrocatalysis, biomass value-added utilization, polymer recycling and green chemistry, and particularly relates to a novel surface reconstruction CoZn oxygen phosphate electrode and application of the novel surface reconstruction CoZn oxygen phosphate electrode in efficient conversion of polylactic acid hydrolysate into acetic acid. A CoZn precursor oxide is prepared through a coprecipitation method, then the CoZnOP catalyst is obtained through phosphating treatment, the CoZnOP catalyst has a unique stacked three-dimensional nano-structure, the synergistic effect of Co and Zn and surface reconstruction induced by doping of the P element, the high specific surface area and rich active sites are provided, and the CoZnOP catalyst has a good application prospect in preparation of acetic acid through electrocatalytic oxidation of lactic acid. The selectivity, the yield, the energy consumption and the stability of the method are obviously superior to those of the prior art, and the method is an ideal technical scheme for realizing high-value utilization of the polylactic acid hydrolysate.

The invention belongs to the technical field of resource recovery, and particularly relates to a method for preparing a lithium ferric manganese phosphate precursor by recycling a waste phosphate positive electrode material as well as a product and application thereof. The method comprises the following steps: S1, dispersing waste phosphate positive electrode material powder in a phosphoric acid solution for reaction, and filtering after the reaction is finished to obtain filter residue 1 and filtrate 1; s2, adding a metal source into the filtrate 1 for reaction, continuously heating, and filtering after the reaction is finished to obtain filter residues 2 and filtrate 2; and S3, drying the filter cake to obtain the rhodochrosite type ferric manganese phosphate precursor. The method for preparing the ferric manganese phosphate precursor by regenerating the waste phosphate positive electrode material is more environment-friendly, more elements are recycled, and the comprehensive utilization rate of the elements is high.

The present technology relates to inorganic compounds having an argyrodite-type structure based on an alkali metal obtained by a preparation process comprising a step of grinding the sulfide of the alkali metal, the sulfate of the alkali metal, phosphorus pentasulfide and a halide of the alkali metal. Also described are electrode materials, electrodes, electrolytes comprising said inorganic compound having an argyrodite-type structure and their uses in electrochemical cells, for example, in electrochemical accumulators, particularly in all-solid-state batteries.

A catalyst has a carrier and a hydrogenation active metal component supported on the carrier. The hydrogenation active metal component contains at least one Group VIB metal component and at least one Group VIII metal component, and the carrier is composed of phosphorus-containing alumina. When the hydrogenation catalyst is measured using a hydrogen temperature programmed reduction method (H2-TPR), the ratio of the peak height of the low-temperature reduction peak, Plow-temp peak, at a temperature of 300-500° C. to the peak height of the high-temperature reduction peak, Phi-temp peak, at a temperature of 650-850° C., i.e. S=Plow-temp peak / Phi-temp peak, is 0.5-2.0; preferably 0.7-1.9, and more preferably 0.8-1.8. The hydrogenation catalyst shows excellent heteroatom removal effect and excellent stability when used in hydrotreatment.

The various embodiments of the present invention provide a system and method for extraction of lithium from active materials of lithium iron phosphate battery. The method involves extraction of materials from spent battery and heating a mixture of the battery's black mass with suitable reagents at specific temperature in a predetermined ratio, to initiate a chemical reaction that efficiently produces lithium chloride, which is then extracted through water leaching. This method eliminates the need for harmful acids and solvents, operates at lower temperatures, and directly produces lithium chloride in a form that is both pure and economically valuable. Furthermore, the process is environmentally friendly, reduces operational costs, and enhances lithium recovery rates. By-products such as calcium fluorophosphate and iron oxide are also repurposed, supporting sustainability and reducing waste. This system offers a significant improvement over traditional methods, providing a safer, more sustainable, and cost-effective solution for recycling Lithium ion batteries.