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

doi:10.1016/j.corsci.2015.04.003

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 journal › Article › peer-review

46 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 language	English
Pages (from-to)	196-202
Number of pages	7
Journal	Corrosion Science
Volume	96
DOIs	https://doi.org/10.1016/j.corsci.2015.04.003
Publication status	Published - 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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10.1016/j.corsci.2015.04.003

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

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.",

keywords = "A. glass, B. SEM, C. de-alloying, C. oxidation",

author = "Qiu, {H. J.} and Wang, {J. Q.} and P. Liu and Y. Wang and Chen, {M. W.}",

note = "Funding Information: This work was supported by the Thousand Young Talents Program of the Chinese Central Government (No. 0220002102003 ), National Natural Science Foundation of China (NSFC, No. 21373280 ), Beijing National Laboratory for Molecular Sciences (BNLMS) and Hundred Talents Program at Chongqing University (No. 0903005203205 ); JST-CREST “Interface Science for Highly Efficient Energy Utilization”, JST; and “World Premier International Research Center (WPI) Initiative” by MEXT, Japan . Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = jul,

day = "1",

doi = "10.1016/j.corsci.2015.04.003",

language = "English",

volume = "96",

pages = "196--202",

journal = "Corrosion Science",

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TY - JOUR

T1 - Hierarchical nanoporous metal/metal-oxide composite by dealloying metallic glass for high-performance energy storage

AU - Qiu, H. J.

AU - Wang, J. Q.

AU - Liu, P.

AU - Wang, Y.

AU - Chen, M. W.

N1 - Funding Information: This work was supported by the Thousand Young Talents Program of the Chinese Central Government (No. 0220002102003 ), National Natural Science Foundation of China (NSFC, No. 21373280 ), Beijing National Laboratory for Molecular Sciences (BNLMS) and Hundred Talents Program at Chongqing University (No. 0903005203205 ); JST-CREST “Interface Science for Highly Efficient Energy Utilization”, JST; and “World Premier International Research Center (WPI) Initiative” by MEXT, Japan . Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - 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.

AB - 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.

KW - A. glass

KW - B. SEM

KW - C. de-alloying

KW - C. oxidation

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DO - 10.1016/j.corsci.2015.04.003

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SN - 0010-938X

VL - 96

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EP - 202

JO - Corrosion Science

JF - Corrosion Science

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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