Annealing effect of amorphous Fe-Si-B-P-Cu precursors on microstructural evolution and redox behavior of nanoporous counterparts

作者：Fu, Chaoqun; Xu, Lijun; Dan, Zhenhua^*; Qin, Fengxiang; Makino, Akihiro; Chang, Hui; Hara, Nobuyoshi

来源：Journal of Alloys and Compounds, 2017, 726: 810-819.

DOI：10.1016/j.jallcom.2017.08.045

• Nanocrystalline Fe-based alloy
• Annealing
• Nanoporous structure
• Redox behavior
• Fe-air battery

Annealing effect of amorphous Fe83.3Si3B10P3Cu0.7 precursor alloys on the formation of the nanoporous structure and their Redox behavior in alkaline conditions has been investigated. Annealing of amorphous Fe83.3Si3B10P3Cu0.7 alloy causes the formation of nanocrystalline hetero-amorphous microstructure coexisting alpha-Fe grains and residual amorphous phase. Preferential dissolution of alpha-Fe grains in H(2)SO(4 )solution leads to the formation of nanoporous structure. The nanoporous electrodes due to the larger specific surface area show the better Redox performance than the nonporous counterpart electrodes. The nanoporous electrodes with almost one-order higher peak current densities than nonporous ones can be good candidates of the negative electrodes of Fe-air battery.

• 出版日期2017-12-5
• 单位南京理工大学