Amorphous titanium oxide electrode for high-rate discharge and charge

The composite material of amorphous titanium oxide and acetylene black (AB) was fabricated by hydrolyzing titaniumisopropoxide in the propanol in which acetylene black was dispersed. The composite material was tested electrochemically. Cyclic voltammetry showed that the amount of reversibly reacted lithium was about x=0.6 in terms of LixTiO2. The composite could be discharged and charged under constant current densities around 2.0 V versus Li/Li+. For current densities of 0.1, 1, and 10 A g−1, the specific capacities measured were 185, 145, and 120 mA g−1, respectively. On the basis of the use of the composite material as an anode, the feasibility of energy devices possessing both high-energy and high-power densities in a lithium battery type is discussed.