Hierarchical nanoporous metal/metal-oxide composite by dealloying metallic glass for high-performance energy storage

H. J. Qiu, J. Q. Wang, P. Liu, Y. Wang, M. W. Chen

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    A free-standing nanoporous YNiCo metal/metal-oxide composite with hierarchical porosity is fabricated by chemically dealloying Al85Y6Ni6Co3 metallic glass in alkaline solutions. The mixed core-shell-like metal/metal-oxide structure formed during dealloying due to the active properties of these metals. Time-dependent etching experiments suggest that the formation of large and small pores occur simultaneously, which may be related to the different dissolution rate of Al at different sites. The nanoporous composite with a highly conductive metal core exhibits a high areal capacitance. Moreover, this strategy can be extended to fabricate other nanoporous composites considering that the composition of metallic glass can be easily tuned.

    Original languageEnglish
    Pages (from-to)196-202
    Number of pages7
    JournalCorrosion Science
    Volume96
    DOIs
    Publication statusPublished - 2015 Jul 1

    Keywords

    • A. glass
    • B. SEM
    • C. de-alloying
    • C. oxidation

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)

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