▎ 摘　　要

NOVELTY - Preparing high-density phosphorylated sodium titanate material, comprises (i) adding the titanium dioxide (TiO2) powder into the alkaline solution at a mass volume ratio of 1g:(10 mL-50 ml), uniformly mixing, and transferring to the hydrothermal reaction kettle, carrying out hydrothermal reaction at 100-200°C for 5-24 hours, and washing the obtained product and drying to obtain sodium titanate nanotube material, (ii) adding the phosphate-containing compound and the sodium titanate nanotube material to the solvent at a molar ratio of P to Ti (0.01-0.2): 1 to obtain a mixed solution with a concentration of 0.05-2 g/ml, the solvent comprises deionized water and absolute ethanol, (iii) stirring at 40-100℃ for 0.5-24 hours with the rotating speed of 50-500 revolutions/minute to obtain dry powder, and (iv) heating the dry powder at 300-800°C for 10 minutes to 10 hours under different atmospheres. USE - The material is useful in metal ion battery (claimed). ADVANTAGE - The specific surface area of the high-density phosphorylated sodium titanate material prepared by the invention is greatly reduced, and the compaction density is greatly improved at the same time. The reduction of the specific surface area effectively reduces the side reactions between the electrode electrolytes, improving the Coulombic efficiency and stability of the material. The improvement of the compaction density greatly increases the volume specific capacity of the material and significantly improves the practicability of the material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for high-density phosphorylated sodium titanate material prepared according to above mentioned method.