Effects of types of drying control chemical additives on the morphologies and electrochemical properties of Li4Ti5O12 anode powders prepared by spray pyrolysis

The various types of drying control chemical additives are applied to control the morphological and electrochemical characteristics of the Li4Ti5O12 powders prepared by spray pyrolysis. The Li4Ti5O12 powders obtained from the spray solutions with formamide, N,N-dimethylformamide, N-methylacetamide and 1,4-dioxane have dense structures and fine sizes. On the other hand, the Li4Ti5O12 powders obtained from the spray solution with glycerol have hollow structure and large size. The Li4Ti5O12 powders obtained from the spray solutions with formamide, N,N-dimethylformamide and 1,4-dioxane have high initial discharge capacities of 167, 166 and 163 mAh/g at a constant current density of 0.1 C. The discharge capacity of the Li4Ti5O12 powders obtained from the spray solution with formamide is 95% of the initial discharge capacity after 60 cycles.

Research highlightsThe Li4Ti5O12 powders prepared from the spray solutions with appropriate DCCA materials have dense structure, fine size, pure crystal structure and high discharge capacity.