▎ 摘　　要

NOVELTY - The modified sodium titanate negative electrode material comprises 100 pts. wt. modified sodium titanate, 40-50 pts. wt. N-methylpyrrolidone, 3-4 pts. wt. a conductive agent, 1-2 pts. wt. sodium carboxymethylcellulose, 0.5-1 pts. wt. a binder and 0.1-0.2 pts. wt. absolute ethanol. The raw materials of the modified sodium titanate comprise sodium titanate, lithium titanate, sodium dodecyl benzene sulfonate, octadecyl ammonium chloride and deionized water. The particle size of the sodium titanate is not more than 15 µm. The particle size of the lithium titanate is not more than 5 µm. The lithium titanate is uniformly dispersed and attached to the surface of the sodium titanate. USE - Modified sodium titanate negative electrode material used in sodium ion battery (claimed). ADVANTAGE - The material is applied to a sodium ion negative electrode, so that the energy density of the sodium titanate used as the negative material of the battery is greatly improved, and the performance stability of the battery is improved. The sodium ion battery containing the modified sodium titanate negative electrode material has a good cycle life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a sodium ion battery negative electrode, which comprises the modified sodium titanate negative electrode material, where the sodium ion battery negative electrode is prepared by mixing sodium carboxymethylcellulose and N-methylpyrrolidone at 35-55 ℃, and stirring at the dispersion linear speed of 10-20 m/second until the mixture is clear and transparent to obtain a mixed liquid, adding a conductive agent into the mixed liquid at 20-35 ℃, and stirring for 2-5 hours at a dispersion linear speed of 15-30 m/second to obtain initial slurry, adding a modified sodium titanate material into the initial slurry at 20-35 ℃, stirring for 2.5-5.5 hours at the dispersion linear speed of 35-40 m/second, then adding a binder and absolute ethanol, and stirring for 1-3 hours to obtain slurry containing the modified sodium titanate material, and mixing the obtained slurry containing the modified sodium titanate material at the speed of 100-200 g/m2, where the density of the sodium ion battery is uniformly coated on a current collector, and the sodium ion battery cathode is obtained by die cutting after rolling; and (2) a sodium ion battery.