Hierarchical nanoporous nickel alloy as three-dimensional electrodes for high-efficiency energy storage

Hierarchical nanoporous metals with a large surface area and rich pore channels are the sought-after nanostructure for many applications. Here we report a two-step dealloying approach to fabricate a hierarchical nanoporous Ni alloy by utilizing the chemical stability difference of the constituent el...

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Bibliographic Details
Published inScripta materialia Vol. 89; pp. 69 - 72
Main Authors Qiu, H.-J., Ito, Y., Chen, M.W.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.10.2014
Subjects
Capacitance
Channels
Dealloying
Electrical conductivity
Electrodes
Hierarchical structure
Nanoporous metal
Nanostructure
Nickel base alloys
Supercapacitor
Surface area
Three dimensional
Supercapacitor
Nanoporous metal
Dealloying
Hierarchical structure
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Summary:Hierarchical nanoporous metals with a large surface area and rich pore channels are the sought-after nanostructure for many applications. Here we report a two-step dealloying approach to fabricate a hierarchical nanoporous Ni alloy by utilizing the chemical stability difference of the constituent elements in a multicomponent precursor. Due to the large surface area and high electric conductivity, the hierarchical nanoporous Ni alloy exhibits a high specific areal capacitance of ∼1.11Fcm−2 and volumetric capacitance of 317Fcm−3.
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ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.06.031