Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1607839 | Journal of Alloys and Compounds | 2016 | 6 Pages |
Abstract
To identify an adequate material for Fe/air battery anodes, we used pure α-Fe2O3 with 1-10 μm grain size as active material to for comparison with commercial materials. Highly relative homogeneous micro α-Fe2O3 with mainly rhombohedral-like shape was prepared by a controlled synthesis method. The effect of morphology, shape, and particle size of Fe2O3 on the electrochemical behavior of Fe2O3/AB electrode was investigated using X-ray diffraction, scanning electron microscopy coupled with X-ray energy-dispersive spectroscopy, transmission electron microscopy, cyclic voltammetry, and galvanostatic cycling performance. Results showed that the prepared α-Fe2O3 provided shaper redox peaks and deposition peaks that were separate from hydrogen evolution. In the initial cycles, both commercial Fe2O3 nanoparticles and prepared α-Fe2O3 microparticles yielded similar discharge capacities but the prolonged cycling of the prepared microparticles provided higher capacities.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bui Thi Hang, Doan Ha Thang,