Preparation and properties of Li4Ti5O12 nanotubes as anode material

Abstract

lithium titanate (LTO), which has spinel structure, has become one of the most popular anode materials for lithium-ion batteries because of its high safety and stability. In this paper, industrial metatitanic acid and lithium hydroxide were used as the main raw materials to prepare nanotube LTO materials by two-step hydrothermal method. The effects of different titanium sources, stirring speed, hydrothermal reaction temperature and time, li-ti molar ratio and other process parameters on the phase, morphology and electrochemical properties of the samples were studied. The experimental results show that the nanotube LTO electrode material can be prepared by stirring at 300 rpm, reacting at a hydrothermal temperature of 170 °C for 20h, controlling the lithium titanium molar ratio of 0.85, and finally calcining; The specific capacity of nanotube LTO reaches 150mah/g at 10 C high magnification, and the capacity retention rate of 500 cycles is more than 92%. Compared with ordinary LTO materials, nanotube LTO has obvious performance advantages and excellent comprehensive electrochemical performance.