Fig. 8
From: Progress in Iron Oxides Based Nanostructures for Applications in Energy Storage
c–e Reprinted with Permission from [85]. Copyright, American Chemical Society
a Discharge − charge voltage profiles of porous Fe2O3 microboxes obtained at 550 °C. b Cycling performance of Fe2O3 microboxes (350 °C), porous Fe2O3 microboxes (550 °C), and hierarchical Fe2O3 microboxes (650 °C) and Coulombic efficiency of porous Fe2O3 microboxes (550 °C) over the voltage range 0.01 − 3.0 V vs. Li/Li+ at the same current density of 200 mA g-1. (a, b Reprinted with Permission from [54]. Copyright, American Chemical Society). Electrochemical measurements of the sample. c CVs between 5 mV and 3 V at a scan rate of 0.5 mV s−1. d Charge–discharge voltage profiles. e Comparative cycling performance of (I) the as-prepared α-Fe2O3 hollow spheres and (II) α-Fe2O3 microparticles. All the galvanostatic tests are performed at a constant current rate of 200 mA g−1 between 0.05 and 3 V.