Facile Synthesis of Fe2O3 Nanoflakes and Their Electrochemical Properties for Li-Air Batteries

Fe2O3 nanoflakes were synthesized via a hydrothermal method and employed as a cathode catalyst for non-aqueous Li-air batteries. The synthesized Fe2O3 nanoflakes with an average diameter of similar to 90 nm were well crystallized. The Fe2O3 nanoflakes manifest superior catalytic activity for oxygen reduction reaction and evolution reaction in Li-air batteries. The discharge-recharge voltage gap of Fe2O3/super P is reduced to similar to 0.83 V. By the addition of Fe2O3, the cell exhibits a capacity of similar to 5200 mAh/g(electrode), and shows a rate capability of similar to 2000 mAh/g(electrode) at a current density of 0.4 mA/cm(2), and it also has a stable capacity performance after 30 cycles. (C) 2013 The Electrochemical Society. All rights reserved.