High-surface-area F-doped amorphous MoOx with high-performance lithium storage properties

Abstract

In this work, we report the feasibility to achieve high lithium storage performance of MoO_x by controlling its microstructure including specific surface area, doping, and amorphous structure. High-surface-area F-doped amorphous MoO_x (a-MoO_x) is synthesized by hydrothermal hydrolysis of ammonium molybdate tetrahydrate in a water–ethylene glycol (H₂O–EG) mixed solvent. The resultant a-MoO_x has a surface area as high as 212.74 m² g⁻¹ and exhibits a hierarchically microporous–mesoporous structure. The electrochemical measurements demonstrate that the high-surface-area F-doped a-MoO_x exhibits high capacity and excellent electrochemical stability when used as an anode material for lithium-ion batteries. Some synergistic factors including F-doping, high specific surface area, and porous structure, may be responsible for the good lithium-storage performance.