3results about "Antimonates/antimonites" patented technology

The present application relates to the field of nonferrous metallurgy, and provides a method for preparing high-quality sodium pyroantimonate by ultrasonic strengthening, comprising the following steps: preparing a mixed solution with the concentration of sodium hydroxide being 200-400 g / L and the concentration of an additive being 10-40 g / L; the additive is potassium hydroxide and / or glycerol; adding antimony oxide into the mixed solution at a proportion of 150-250 kg / m 3 , and heating and performing ultrasonic treatment to obtain a mixed slurry; adding hydrogen peroxide into the mixed slurry, continuing to react for 10-120 min after the hydrogen peroxide is completely added, then performing liquid-solid separation to obtain a solid product; drying the solid product after washing to obtain a sodium pyroantimonate product. The essence of the present application is that the oxidation diffusion process is strengthened by using ultrasonic waves and an additive, and the high-quality sodium pyroantimonate product is prepared by the combined action. The sodium pyroantimonate product prepared by the method has the advantages of good quality, low consumption of oxidizing agent, stable technical indexes, etc.

This invention discloses a composite modified lithium manganese oxide cathode material, its preparation method, and its applications, belonging to the field of cathode material technology. The structural formula of the composite modified lithium manganese oxide cathode material is: LiX a O b @LiYO2 / LiMn2O4, comprising: a core composed of LiYO2 and LiMn2O4, and LiX coating at least a portion of the surface of the core. a O b The coating layer; wherein: LiMn2O4 has a porous structure, and LiYO2 fills the channels of LiMn2O4. The cathode material in this invention uses lithium manganese oxide as a matrix, with LiYO2 filling the channels of the matrix, and LiX coated on the surface of the matrix. a O b Filling the pores with LiYO2 can reduce the Jahn-Teller effect of lithium manganese oxide without affecting the specific capacity of the cathode material. Moreover, LiYO2 can accelerate the lithium-ion diffusion rate, thereby improving the rate performance of the material.

This invention relates to the field of inorganic fine chemical material preparation technology, and discloses a method for purifying electronic-grade sodium metaantimonate with low impurity content. The method includes: dissolving antimony trioxide in sodium hydroxide solution and cooling to a first reaction temperature after impurity removal; adding sodium gluconate to construct a coordination metastable system containing a pentavalent antimony precursor; atomizing and dropping hydrogen peroxide to complete the oxidation reaction while maintaining the homogeneous system without precipitation; heating to a second reaction temperature to dissociate the coordination system and induce controlled crystal precipitation; and obtaining the product after separation, washing, and drying. This invention completely decouples the oxidation reaction and crystallization process on the time axis through chemical means, and achieves lattice-level deep self-purification by using a thermally induced dissociation mechanism while suppressing explosive nucleation. The obtained sodium metaantimonate has extremely high purity and a regular cubic crystal morphology.