The lithium storage mechanism of a new Li3Ti0.75(MoO4)3 high-performance anode material and its applications for both half-cell and full-cell

作者：Yao, Heng; Dong, Youzhong^*; Duan, He; Zhang, Jun; Chen, Ming; Zhao, Yanming; Kuang, Quan; Fan, Qinghua

来源：Journal of Power Sources, 2022, 530: 231300.

DOI：10.1016/j.jpowsour.2022.231300

• Lithium-ion batteries
• Anode material
• Li3Ti0.75(MoO4)(3)
• Transition metal oxides

Anode materials with a low operating voltage, high capacity and excellent cycling stability are of great significance in the practical application of lithium-ion batteries (LIBs). In this work, a new anode material Li3Ti0.75(MoO4)(3) is successfully synthesized. Due to the realization of the multielectron reversible reaction from Mo6+ to Mo0, the Li3Ti0.75(MoO4)(3) electrode shows excellent electrochemical properties with a high reversible capacity of approximately 950 mAh g(-1). Moreover, because the uniform distribution of titanium produced in the initial discharge process increases the conductivity of the electrode material, even at a high current density of 1 A g(-1), a stable and high specific capacity of 644.6 mAh g(-1)& nbsp;can be obtained after 350 cycles, which is close to twice that of a commercial graphite anode. Using in-situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM), we analyze the complex reaction mechanism of the electrode in detail for the first time. Moreover, the full-cell test exhibits a stable and reversible practical specific capacity of 120 mAh g(-1)& nbsp;and excellent cycling stability. These results show that Li3Ti0.75(- MoO4)(3) promising for practical application and may be a potential alternative to commercial graphite anode materials.

• 单位
  广东工业大学