2015 Volume 83 Issue 10 Pages 867-869
Carbon-modified ramsdellite titanium dioxide, TiO2(R), was prepared without using metallic Ti powder, and its charge and discharge properties was investigated as an anode of lithium ion batteries. Carbon sources (citric acid and multi-walled carbon nanotubes) were added in the calcination process to obtain a LiTi2O4 precursor. The carbon addition was indispensable to obtain stoichiometric LiTi2O4 as a precursor and the resulting Li+-free TiO2(R). The carbon-modified TiO2(R) had a round shape and a smaller particle size of 0.5–1.5 µm. The discharge capacity and rate-capability were improved by carbon modification due to an enhancement of the electronic conductivity and a reduction of the lithium-ion diffusion path.