Sol-gel method for preparing lithium titanate

The invention belongs to the technology field of lithium battery, and especially relates to a sol-gel method for preparing lithium titanate. The invention aims to solve the technology problem of uneasy operation control, which causes the instability of gel, in the conventional sol-gel method. In order to solve the technology problem mentioned above, the invention provides a sol-gel method for preparing lithium titanate. The method comprises following steps: step a, dissolving butyl titanate in glycol to prepare a solution; step b, mixing dihydrate lithium acetate, citric acid, absolute ethanol and deionized water together to prepared a solution; step c, dropwise adding the solution obtained in the step b into the solution obtained in the step a, adding ammonia liquor at the same time, then stirring to obtain transparent sol, then ageing to obtain the gel; step d, drying the gel under constant temperature to obtain dry gel, then fully grinding the dry gel to obtain precursors; step e, and finally sintering the