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4 results about "Sodium peroxide" patented technology
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Sodium peroxide is the inorganic compound with the formula Na₂O₂. This yellowish solid is the product of sodium ignited in excess oxygen. It is a strong base. This metal peroxide exists in several hydrates and peroxyhydrates including Na₂O₂·2H₂O₂·4H₂O, Na₂O₂·2H₂O, Na₂O₂·2H₂O₂, and Na₂O₂·8H₂O. The octahydrate, which is simple to prepare, is white, in contrast to the anhydrous material.
Hard carbon composite, preparation method and sodium ion battery
The present application relates to the technical field of battery material preparation, and particularly relates to a hard carbon composite material, a preparation method and a sodium ion battery. The preparation method comprises the following steps: providing a carbon source, sodium peroxide and phytic acid in a preset ratio to be mixed to obtain a mixture; performing a reduction reaction and a first heating in the mixture to obtain a porous hard carbon precursor; introducing borane gas into a reaction space in which the porous hard carbon precursor is located, and performing a second heating and a deposition reaction to obtain the hard carbon composite material. The present application further provides a hard carbon composite material and a sodium ion battery. The problems of low energy density and poor fast charging performance of the hard carbon used in the sodium ion battery are solved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A method for low-temperature and high-efficiency deconstruction and recovery of lithium based on local strengthening effect of sodium peroxide
The application relates to the technical field of waste lithium ion battery recycling, in particular to a method for lithium recovery by low-temperature efficient deconstruction of lithium iron phosphate based on the local strengthening effect of sodium peroxide. The method comprises the following steps: S1, uniformly mixing lithium iron phosphate material and sodium peroxide according to a preset mass ratio, grinding and refining to obtain a dry mixture containing sodium peroxide; S2, placing the mixture in a calcination device to obtain a calcination product; S3, water immersion separation: stirring and leaching the calcination product in deionized water, and performing solid-liquid separation to obtain a lithium-containing aqueous solution and an iron-based leaching residue; S4, lithium recovery and purification: removing impurities from the lithium-containing aqueous solution by separation and purification to obtain a lithium salt product; and S5, iron resource recovery: performing acid leaching treatment on the iron-based leaching residue to obtain an iron-containing leaching solution, so that the iron resource recovery is realized. The application solves multiple technical bottlenecks such as large acid consumption in the existing hydrometallurgy, high energy consumption in the pyrometallurgy and insufficient activity of conventional alkaline salt calcination.
Owner:BEIJING UNIV OF TECH