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Issue 5, 2014
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Lithographically defined porous Ni–carbon nanocomposite supercapacitors

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Abstract

Ni was deposited onto lithographically-defined conductive three dimensional carbon networks to form asymmetric pseudo-capacitive electrodes. A real capacity of above 500 mF cm−2, or specific capacitance of ∼2100 F g−1 near the theoretical value, has been achieved. After a rapid thermal annealing process, amorphous carbon was partially converted into multilayer graphene depending on the annealing temperature and time duration. These annealed Ni–graphene composite structures exhibit enhanced charge transport kinetics relative to un-annealed Ni–carbon scaffolds indicated by a reduction in peak separation from 0.84 V to 0.29 V at a scan rate of 1000 mV s−1.

Graphical abstract: Lithographically defined porous Ni–carbon nanocomposite supercapacitors

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Publication details

The article was received on 28 Oct 2013, accepted on 18 Nov 2013 and first published on 25 Nov 2013


Article type: Paper
DOI: 10.1039/C3NR05751H
Citation: Nanoscale, 2014,6, 2629-2633
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    Lithographically defined porous Ni–carbon nanocomposite supercapacitors

    X. Xiao, T. Beechem, D. R. Wheeler, D. B. Burckel and R. Polsky, Nanoscale, 2014, 6, 2629
    DOI: 10.1039/C3NR05751H

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