2024-03-28T22:38:10Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/346962021-06-14T10:00:56Zcom_10261_66com_10261_3col_10261_319
Amorphous Carbon Nanofibers and Their Activated Carbon Nanofibers as Supercapacitor Electrodes
Barranco, Violeta
Lillo-Ródenas, Maria Ángeles
Linares-Solano, A.
Oya, A.
Pico, F.
Ibáñez, Joaquín
Agulló Rueda, F.
Amarilla, José Manuel
Rojo, J. M.
Carbon nanofibres
supercapacitor electrode
Carbon nanofibers (CNFs) show a high electrical conductivity but a reduced specific surface area that limits
their use as electrode materials for supercapacitors. In this work, amorphous CNFs, with a relatively high
electrical conductivity are easily activated in KOH, using certain KOH/CNF weight ratios. Activation does
not produce any important change in the shape, surface roughness, diameter, graphene sheet size, and electrical
conductivity of starting nanofibers. However, activation leads to new micropores and larger surface areas as
well as a higher content of basic oxygen groups. They clearly enhanced the specific capacitance, attaining
values higher than those reported for other activated CNFs. In this study, the effects of micropore size and
oxygen content on the specific capacitance are discussed for three electrolytes: H2SO4, KOH, and
(CH3CH2)4NBF4. Moreover, a good cycle life is found for the most activated CNFs.
Acknowledgment. Financial support through the project of
reference MAT 2008-03182 is gratefully acknowledged. V.B.
thanks the Spanish Ministry of Science and Innovation for a
RyC contract. F.P. thanks CSIC for a JAE doc contract
Peer reviewed
2011-04-15T10:19:25Z
2011-04-15T10:19:25Z
2010
artículo
http://purl.org/coar/resource_type/c_6501
Journal of Physical Chemistry C 114 : 10302–10307 (2010)
1932-7447
http://hdl.handle.net/10261/34696
10.1021/jp1021278
en
http://dx.doi.org/10.1021/jp1021278
none
American Chemical Society