Nanostructured carbon films have been grown at room temperature by supersonic cluster beam deposition. Due to a structure based on nanotube embryos and a porosity with grain sizes of a few tens of nanometers, these films have a highly accessible surface area needed for electrochemical applications such as supercapacitors. Films with a density of 1 g/cm3 show, in the dc regime, a specific capacitance per electrode of 75 F/g on a single-cell device with polycarbonate as the organic electrolyte. The resulting energy and power densities of cluster-assembled carbon electrodes are 76 Wh/kg and 506 kW/kg. The possibility of depositing nanostructured films over a large area on a variety of substrates makes cluster-beam deposition very interesting for the realization of supercapacitors.

1.
R. H.
Baugham
,
C.
Cui
,
A. A.
Zakhidov
,
Z.
Iqbal
,
J. N.
Barisci
,
G. M.
Spinks
,
G. G.
Wallace
,
A.
Mazzoldi
,
D.
De Rossi
,
A.
Rinzler
,
O.
Jaschinski
,
S.
Roth
, and
M.
Kertesz
,
Science
284
,
1340
(
1999
).
Google Scholar
 
2.
Q. H.
Wang
,
A. A.
Setlur
,
J. M.
Lauerhaas
,
J. Y.
Dai
,
E. W.
Seelig
, and
R. P. H.
Chang
,
Appl. Phys. Lett.
72
,
2912
(
1998
).
Google Scholar
 
3.
C.
Niu
,
E. K.
Sichel
,
R.
Hoch
, and
H.
Tennent
,
Appl. Phys. Lett.
70
,
1480
(
1997
).
Google Scholar
 
4.
A. F. Burke, in The First International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, Florida Educational Seminars, Boca Raton, FL (1991).
5.
S. T.
Mayer
,
R. W.
Pekala
, and
J. L.
Kaschmitter
,
J. Electrochem. Soc.
140
,
446
(
1993
).
Google Scholar
 
6.
A.
Kornyshev
,
W.
Schmickler
, and
M.
Vorotyntsev
,
Phys. Rev. B
25
,
5244
(
1982
).
Google Scholar
 
7.
I.
Tanahashi
,
A.
Yoshida
, and
A.
Nishino
,
J. Electrochem. Soc.
137
,
3052
(
1990
).
Google Scholar
 
8.
E.
Barborini
,
P.
Piseri
,
A. C.
Ferrari
,
A.
Li Bassi
,
C. E.
Bottani
, and
P.
Milani
,
Chem. Phys. Lett.
300
,
633
(
1999
).
Google Scholar
 
9.
D.
Donadio
,
L.
Colombo
,
P.
Milani
, and
G.
Benedek
,
Phys. Rev. Lett.
83
,
776
(
1999
).
Google Scholar
 
10.
A. C.
Ferrari
,
B. S.
Satyanarayana
,
J.
Robertson
,
W. I.
Milne
,
E.
Barborini
,
P.
Piseri
, and
P.
Milani
,
Europhys. Lett.
46
,
245
(
1999
).
Google Scholar
 
11.
P.
Milani
,
M.
Ferretti
,
P.
Piseri
,
C. E.
Bottani
,
A. C.
Ferrari
,
A.
Li Bassi
,
G.
Guizzetti
, and
M.
Patrini
,
J. Appl. Phys.
82
,
5793
(
1997
).
Google Scholar
 
12.
M. Bogana, L. Colombo, D. Donadio, and G. Benedek (unpublished).
13.
Direct comparison with nanotube-based electrodes is not directly possible since the power density reported in Ref. 3 has been estimated for the whole supercap device and not for a single electrode, as in our case.
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