The electrochemical properties of Fe2O3-loaded carbon electrodes for iron-air battery anodes

被引:66
作者
Hang, BT
Watanabe, T
Eashira, M
Okada, S
Yamaki, J
Hata, S
Yoon, SH
Mochida, I
机构
[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 8168580, Japan
[2] Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 8168580, Japan
[3] Kyushu Univ, Dept Engn Sci Elect & Mat, Fukuoka 8168580, Japan
基金
日本科学技术振兴机构;
关键词
nano-carbon; Fe2O3-loaded carbon materials; iron-air battery anode;
D O I
10.1016/j.jpowsour.2005.02.028
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The redox efficiency of iron has been improved by increasing the distribution of iron on the carbon surface with Fe2O3-loaded carbon materials. The Fe2O3-loaded carbon material was prepared by loading Fe2O3 on carbon by a chemical method. Fe(NO3)(3) was impregnated on carbon with different weight ratios of iron-to-carbon in an aqueous solution, and the mixture was dried and then calcined for 1 h at 400 degrees C in flowing Ar. The effect of various carbons on the physical and electrochemical properties of Fe2O3-loaded carbon electrodes was investigated with the use of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) along with X-ray energy-dispersive spectroscopy (EDS), cyclic voltammetry (CV) and galvanostatic cycling performance. Transmission electron microscopy coupled with X-ray diffraction measurements revealed that small Fe2O3 particles were distributed on the carbon surface. Natural graphite and several nano-carbon materials such as acetylene black and tubular carbon nanofibers (tubular CNF) exhibited improved characteristics, such as enhanced capacity and higher redox currents for the Fe2O3-loaded carbon electrode. SEM and EDS results suggest that Fe2O3-loaded nano-carbon electrodes, due to the large surface area of the nano-carbon, have more Fe2O3 dispersed than on Fe2O3-coated graphite electrodes. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:261 / 271
页数:11
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