Porous TiO2-FeTiO3@Carbon nanocomposites as anode for high-performance lithium-ion batteries

TiO2-FeTiO3 nanocomposites were successfully fabricated through a facile solvothermal route. The porous TiO2-FeTiO3@C ternary composites, with a specific surface area of 46.4 m(2) g(-1), were obtained by carbonizing the pyrrole coated porous TiO2-FeTiO5 precursor. The composition of the nanocomposites obtained in terms of mass percentages was ca. 29.20%, 68.75%, and 2.05%, for TiO2, FeTiO3, and C, respectively. Electrochemical tests demonstrated that the as-prepared TiO2-FeTiO3@C porous electrode material possessed a reversible capacity of 494.5 mAh g(-1) after 150 cycles at a current density of 100 mA g(-1). Rate capability test reveals that at current densities of 100, 200, 400, 800, and 1600 mA g(-1), the specific capacities obtained were 374.1, 248.4, 189.3, 158.2, and 116.2 mAh g(-1), respectively. Compared to TiO2 or TiO2@C composites, TiO2-FeTiO3@C porous composites demonstrated good cycling and rate performance, arising from the synergistic effect created by the structural stability of TiO2, high capacity of FeTiO3, and good electrical conductivity of the carbon coating during the charge/discharge processes. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

The TiO2-FeTiO3@C ternary composites exhibit excellent cycling and rate performance due to the synergistic effect of the structural stability of TiO2, high capacity of FeTiO3, and good electrical conductivity of the carbon coating.