Preparation of Nanotube TiO2-Carbon Composite and Its Anode Performance in Lithium-Ion Batteries

A nanocomposite between carbon and nanotube TiO2 (CNTT) was prepared by addition of activated carbon during hydrothermal treatment of TiO2 and following high-temperature calcinations. From morphological analysis using a scanning electron microscope, transmission electron microscope, and N2 sorption profiles, it was revealed that nanotube TiO2 was homogeneously dispersed with carbon in nanoscale for CNTT materials. When applied into the anode in a lithium-ion battery, CNTT electrodes displayed higher cyclability and better rate capability. From ac-impedance measurement, the total resistance was smaller in the CNTT electrode due to a homogeneously dispersed carbon in nanoscale and a more porous structure.This research was supported by a grant from the Fundamental Research and Development Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea