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

Chaoqun Fu, Lijun Xu, Zhenhua Dan, Fengxiang Qin, Akihiro Makino, Hui Chang, Nobuyoshi Hara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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 α-Fe grains and residual amorphous phase. Preferential dissolution of α-Fe grains in H2SO4 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.

Original languageEnglish
Pages (from-to)810-819
Number of pages10
JournalJournal of Alloys and Compounds
Volume726
DOIs
Publication statusPublished - 2017 Dec 5

Keywords

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

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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