H₂Ti₁₂O₂₅ (HTO) is a negative-electrode oxide material for Li-ion batteries with high capacity and repetition stability. To improve the conductive performance of HTO, porous titanium hydroxide powder containing fine carbon particles was synthesized by hydrolyzing TiOSO₄ solution with fine carbon particles, and a HTO containing fine carbon particles was synthesized by impregnation method using its porous titanium hydroxide. The charge–discharge properties of this sample were characterized, and its Li insertion and extraction performance was generally higher than that of HTO without C prepared by solid-state and impregnation methods.