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.com
Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Advanced Materials 2018
September 04-06, 2018
September 04-06, 2018 | Zürich, Switzerland
21
st
International Conference on
Advanced Materials & Nanotechnology
Growth and electrochemical characterization of graphene nano walls and carbon nanotubes
Roger Amade
1
, Arevik Musheghyan-Avetisyan
1
, Joan Martí-González
1
, Fernando Pantoja-Suárez
1,3
, Islam Alshaikh
1
, Shahzad Hussain
1
, Jose Luís
Andújar
1
, Esther Pascual
1
, Enric Bertran
1
, Ángel Pérez del Pino
2
and
Eniko György
2
1
Universitat de Barcelona, Spain
2
Institut de Ciència de Materials de Barcelona, Spain
3
Escuela Politécnica Nacional, Ecuador
E
lectrochemical double layer capacitors (EDLC) or supercapacitors exhibit higher specific capacitance than conventional
electrolytic capacitors due to their increased surface area and short distance between positive and negative charges at
the electrode/electrolyte interface. Because of their high electric conductivity, chemical inertness, thermal and mechanical
stability, carbon-based electrodes are the preferred material of choice in supercapacitor applications. In particular, carbon
nanostructures such as carbon nanotubes (CNTs), with a high specific surface area may increase the capacitance upto about
100 F/g. Recently, graphene nanowalls (GNWs) are being the focus of research in different areas due to their outstanding
properties. GNWs can be described as self-assembled, vertically-standing, few-layered graphene sheet nanostructures. The
growth mechanism of these nanostructures is still not clear, but recent results indicate that they grow virtually on every
substrate that withstand the synthesis temperature (around 600
º
C) without the need of a catalyst. Thus, this new material
has promising features that may improve performance of energy storage devices like supercapacitors or lithium ion batteries.
Surface functionalization of these nanostructures by means of plasma treatments or deposition of metal oxides may further
improve their pseudo capacitance and electrochemical performance. This study explores the growth of GNWs and their super
capacitive properties grown under different conditions, and compares the results with those obtained for CNTs.
Figure:
Top view of Graphene Nanowalls deposited on silicon wafer by means of ICP-CVD (Inductively Coupled Plasma-Chemical Vapor Deposition).
Recent Publications
1. Davami K, Shaygan M, Kheirabi K, Zhao J, Kovalenko D A, Rümmeli MH, Opitz J, Cuniberti G, Lee J S and Meyyappan
M (2014) Synthesis and characterization of carbon nanowalls on different substrates by radio frequency plasma enhanced
chemical vapor deposition. Carbon Journal 72:372-380.
2. Song X, Liu J, Leyong Y, Yang J, Fang L, Shi H, Du C and Wei D (2014) Direct versatile PECVD growth of graphene
nanowalls on multiple substrates. Materials Letters Journal 137:25-28.
3. Bo Z, Yang Y, Chen C, Yu K, Yana J and Cena K (2013) Plasma-enhanced chemical vapor deposition synthesis of vertically
oriented graphene nanosheets. Nanoscale 5:5180-5204.
4. Pérez del Pino A, György E, Alshaikh I, Pantoja-Suárez F, Andújar JL, Pascual E, Amade R and Bertran-Serra E (2017)
Laser-driven coating of vertically aligned carbon nanotubes with manganese oxide from metal organic precursors for
energy storage, Nanotechnology 28(39):1-9.
5. 5. Hussain S, Amade R, Moreno H and Bertran E (2014) RF-PECVD growth and nitrogen plasma functionalization of
CNTs on copper foil for electrochemical applications. Diamond and Related Materials 49:55-61.
Roger Amade et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C3-020