Carbon nanofiber supercapacitors with large areal capacitances

James R. McDonough, Jang Wook Choi, Yuan Yang, Fabio La Mantia, Yuegang Zhang, Yi Cui

Research output: Contribution to journalArticlepeer-review

120 Scopus citations

Abstract

We develop supercapacitor (SC) devices with large per-area capacitances by utilizing three-dimensional (3D) porous substrates. Carbon nanofibers (CNFs) functioning as active SC electrodes are grown on 3D nickel foam. The 3D porous substrates facilitate a mass loading of active electrodes and per-area capacitance as large as 60 mg/ cm2 and 1.2 F/ cm2, respectively. We optimize SC performance by developing an annealing-free CNF growth process that minimizes undesirable nickel carbide formation. Superior per-area capacitances described here suggest that 3D porous substrates are useful in various energy storage devices in which per-area performance is critical. © 2009 American Institute of Physics.
Original languageEnglish (US)
Pages (from-to)243109
JournalApplied Physics Letters
Volume95
Issue number24
DOIs
StatePublished - Dec 15 2009
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-11-001-12
Acknowledgements: Y. C. acknowledges support from the King Abdullah University of Science and Technology (KAUST) Investigator Award No. KUS-11-001-12). J.M. acknowledges funding support from the National Science Foundation Graduate Research Fellowship and the National Defense Science and Engineering Graduate Fellowship. CNF synthesis at the Molecular Foundry at Lawrence Berkeley National Laboratory was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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