DURABILITY AND CYCLING STABILITY OF COPPER COATED TITANIA NANOTUBE AS ANODE MATERIALS FOR Li-ION BATTERY

摘要

The titania nanotube prepared by using an anodizing was coated with copper by the electrodeposition and its electrochemical properties were investigated as the anode material. The discharge capacity of copper coated titania nanotube composite is higher than that of parent titania nanotube. The initial reversible capacities corresponding to titania nanotube and copper coated titania nanotube composite are 185.35 and 226.54 mAh/g at a high charge/discharge current density of 200 mA/g(lC). After 300 charge/discharge cycles, the discharge capacity reaches 185.64 mAh/g with capacity degradation of only 15.86 % for the copper coated titania nanotube composite while it decreases to 137.2 mAh/g with a capacity loss as high as 25.93 % for the titania nanotube. The results indicated that copper coated titania nanotube shows excellent electrochemical properties as anode materials for lithium-ion batteries.