α‐Fe 2 O 3 Nanoflakes as an Anode Material for Li‐Ion Batteries

Abstract Nanoflakes of α‐Fe 2 O 3 were prepared on Cu foil by using a thermal treatment method. The nanoflakes were characterized by X‐ray diffraction, scanning electron microscopy, high‐resolution transmission electron microscopy, and Raman spectroscopy. The reversible Li‐cycling properties of the α‐Fe 2 O 3 nanoflakes have been evaluated by cyclic voltammery, galvanostatic discharge–charge cycling, and impedance spectral measurements on cells with Li metal as the counter and reference electrodes, at ambient temperature. Results show that Fe 2 O 3 nanoflakes exhibit a stable capacity of (680 ± 20) mA h g –1 , corresponding to (4.05 ± 0.05) moles of Li per mole of Fe 2 O 3 with no noticeable capacity fading up…