Effects of types of drying control chemical additives on the morphologies and electrochemical properties of Li 4Ti 5O 12 anode powders prepared by spray pyrolysis

Abstract

The various types of drying control chemical additives are applied to control the morphological and electrochemical characteristics of the Li 4Ti 5O 12 powders prepared by spray pyrolysis. The Li 4Ti 5O 12 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 Li 4Ti 5O 12 powders obtained from the spray solution with glycerol have hollow structure and large size. The Li 4Ti 5O 12 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 Li 4Ti 5O 12 powders obtained from the spray solution with formamide is 95% of the initial discharge capacity after 60 cycles.