Synthesis and electrode properties of alpha-Fe2O3 from iron phthalocyanine

Abstract

The structural evolution of Fe2O3 fine powder synthesized by thermal decomposition of iron phthalocyanine was investigated by X-ray diffraction and Raman spectroscopy. X-ray results indicate that Fe2O3 evolves above 300 degrees C. Raman spectroscopy reveals that it belongs to alpha-Fe2O3. Electrochemical measurements show that only the sample fired at 320 degrees C is of potential interest as an anode in lithium-ion cells, since it displays a recharge capacity of 570 mAh/g in the range of 0.5 to 2.5 V vs. Li. Although the capacity declines during the initial cycles, it becomes stable after ten cycles. (C) 1999 The Electrochemical Society. S1099- 0062( 98) 07- 098- 9. All rights reserved.