Hefei Guoxuan High-Tech Power Energy Co., Ltd.

Maoping Yang

Xiaoming Xu

Xulai Yang

Jia Xie

Zhen Li

Dajun Liu

Wenting Zhu

A method for synthesizing lithium titanate includes preparing a supercritical fluid from water; reacting a solution containing lithium and titanium with the supercritical fluid under a condition that maintains the supercritical fluid in its supercritical state to produce a reaction mixture comprising the lithium titanate; and collecting the lithium titanate. The supercritical fluid is prepared at a temperature of 375-500&#xb0; C. and a pressure of 22-35 MPa. The solution containing lithium and titanium is prepared by mixing a solution containing lithium, prepared by dissolving a lithium source in a selected solvent, and a solution containing titanium, prepared by dissolving a titanium source in the selected solvent, wherein a molar ratio of lithium:titanium is between 4.0:5.0 and 4.5:5.0. The lithium source is lithium hydroxide, lithium carbonate, lithium acetate, lithium oxalate, lithium nitrate, or lithium oxide, and the titanium source is tetrabutyl titanate.

Supercritical continuous hydrothermal synthesis of lithium titanate anode materials for lithium-ion batteries

A method for preparing a LiNbTiO/C nanocomposite as anode material for lithium-ion batteries is disclosed, which includes the following steps: (a) obtaining a mixture of a lithium salt, niobium pentaoxide, titanium dioxide (TiO), and a carbon source in a selected stoichiometric ratio; (b) mixing the mixture in a dispersant to produce a slurry; (c) drying the slurry to produce a dried mixture; (d) treating the dried mixture under a protective atmosphere, according to a heating program to produce the LiNbTiO/C nanocomposite, wherein the heating program comprises: calcining the dried mixture at 600&#xb0; C. for 2-6 hours, heating it at a rate of 2-20&#xb0; C. per minute to 950-980&#xb0; C., cooling it by natural cooling to 800-850&#xb0; C., maintaining the temperature at 800-850&#xb0; C. for 16 hours, and cooling it by natural cooling to room temperature.

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Anhui, China

Maoping Yang