FeMoO4/N-doped porous carbon composites as anode material for high-performance lithium-ion batteries

Abstract

FeMoO₄ is a potential anode material for Li-ion batteries due to its high theoretical specific capacity. The factors that restrict the application of FeMoO₄ are the low specific surface area of the material and poor cycle stability caused by the huge volume change during the cycling process of lithium ion insertion and extraction. In this work, N-doped porous carbon was synthesized and composited with FeMoO₄ by a hydrothermal method. The large specific surface area provided by the porous structure can enable sufficient contact of ions/electrons with active sites, thereby enhancing the lithium storage performance and buffering the volume change during lithiation/delithiation, leading to a high cycling stability of the material. After 200 cycles at a current density of 300 mA g⁻¹, the discharge specific capacity of the composite can reach up to 1291.4 mA h g⁻¹.