Li4Ti5O12@carbon nanotube arrays as high-performance anode for Li-ion batteries

Abstract

The innovation of advanced high-rate anodes is of great significance for the development of high-power and fast-charging lithium-ion batteries (LIBs). In this work, self-supported Li₄Ti₅O₁₂@carbon (LTO@C) nanotube arrays as a high-quality anode are fabricated via anodizing and hydrothermal processes. Owing to the structure having a high contact surface area and good stability, as well as the incorporation of carbon, the LTO@C exhibits a remarkable rate capability (a reversible capability of 290 mA h g⁻¹, 251.9 mA h g⁻¹, 228.8 mA h g⁻¹, and 208.7 mA h g⁻¹ at 1C, 5C, 10C, and 20C, respectively) and cycling performance (71.7% capacity retention after 1000 cycles at 10C), which is superior to LTO. These features suggest the promising application of LTO@C in high-power energy storage areas.