The preparation of H2Ti12O25 via multi-method and their rate performance in Lithium ions battery

H2Ti12O25 nanorods are successfully prepared via hydrothermal reaction following heat treatment at 260 °C. The D50 value and surface area of H2Ti12O25 nanorods are 0.186 μm and 35.0637 m2 g−1, respectively. For comparison, Bulk-H2Ti12O25 are also prepared by milling assisted soft-chemical method, and the D50 value and surface area of Bulk-H2Ti12O25 are 0.274 μm and 4.3213 m2 g−1, respectively. The electrochemical tests show H2Ti12O25 nanorods deliver higher reversible capacity of 191.3 mAh g−1 (1C) after 100 cycles, 150.5 mAh g−1 (10C) and 132.1 mAh g−1 (20C) after 200 cycles, while for Bulk-H2Ti12O25, its reversible capacity is only 171.2 mAh g−1 (1C) after 100 cycles, 113.7 mAh g−1 (10C) and 83.3 mAh g−1 (20C) after 200 cycles. Meanwhile, H2Ti12O25 nanorods exhibit better rate performance at all rates compared with Bulk-H2Ti12O25. The higher discharge/charge capacity and cycling stability at high discharge/charge rate powerfully suggests that H2Ti12O25 nanorods hold great potential as high rate anode material for electric vehicles and hybrid electric vehicles.