Синтез и электрохимическое поведение композитного материала α-Fe2O3/углерод со структурой ядро/оболочка

Carbon-coated hematite α-Fe2O3 core-shell structure had been synthesized by a facile method of pulsed high-voltage discharge. The structure, morphology, and phase composition of the material were characterized by SEM, TEM, and XRD methods. The material is composed of α-Fe2O3 particles (average size ~200 nm). Surfaces of particles are coated with amorphous carbon (coating thickness ~8 nm). When carbon-coated α-Fe2O3 was galvanostatically cycled at 100 mA · g–1 in the voltage range of 3.0–0.005 V, it exhibits a reversible capacity of 479 mA·h g–1 after 7 cycles with high Coulombic efficiency of 97 %.