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Application of carbon nanotubes directly grown on aluminum foils as electric double layer capacitor electrodes

: Khavrus, Vyacheslav O.; Weiser, Mathias; Fritsch, Marco; Ummethala, Raghunandan; Salvaggio, Maria Grazia; Schneider, Michael; Kusnezoff, Mihails; Leonhardt, Albrecht


Chemical vapor deposition: CVD 18 (2012), Nr.1-3, S.53-60
ISSN: 0948-1907
ISSN: 1521-3862
Fraunhofer IKTS ()
alignment; carbon nanotubes; electric double layer capacitors; surface

Carbon nanotubes (CNTs) are directly grown by catalytic (C)CVD on Al foils with various surface morphologies to make hybrid electrodes for electric double layer capacitors (EDLCs). A simple drop-coating procedure is used for the deposition of the Fe/Al-based catalyst. It is found that the surface topography of the Al foil is a governing factor for the growth of CNTs, their alignment, and adhesion to the current collector. Prepared electrodes achieve a specific capacitance up to 11.2 F g−1, which is found to be weakly sensitive to the alignment of the CNTs. Discussion of parameters that influence the properties of the resulting EDLCs is presented.