Abstracts Book - IMRC 2018

• SC1-P001
SUPERCAPACITIVE BEHAVIOR OF MULTIWALLED C/NiO
NANOTUBES SYNTHETIZED BY LIQUID PHASE DEPOSITION
METHOD
Jorge Vazquez Lujano 1 , Jorge Roberto Vargas Garcia 2
1 Instituto Politécnico Nacional - IPN, ESIQIE-Departamento de Ingeniería en Metalurgia y
Materiales, Mexico. 2 Instituto Politécnico Nacional - IPN, Centro de Nanociencias y Micro y
Nanotecnologías, Mexico.
Nanotubes are materials of great technological and scientific interest due to
their great potential for applications in electronic, magnetic and optical devices
as well as in catalysis. Nickel oxide (NiO) is considered one of the most pseudocapacitive
promising materials due to high capacitance and excellent reactivity
in electrochemical reactions. Here, we report the synthesis of C/NiO nanotubes
(C/NiO-NTs) by a liquid phase deposition method (LPD) using multiwalled carbon
nanotubes (MWCNT) as template. Nickel nitrate was used as precursor metallic.
The LPD products were heat treated at 450 °C and 500 °C for 0.5 h in air. SEM
observations indicated that LPD products are 1D materials with lengths 6 to 20
μm and dimeters between 70 and 90 nm. TEM images revelated that LPD
products are multiwalled nanotubes in nature showing an interlaying spacing of
0.24 nm, which corresponds to the interlayer spacing of the NiO (111), along with
interlayer spacing of 0.34 nm that correspond to the graphitic structure of
MWCNT (002). These results suggest that C/NiO nanotubes consist of graphitelike
and NiO crystalline phases. The capacitive behavior on the C/NiO-NTs was
investigated by cyclic voltammetry and electrochemical impedance
spectroscopy in 1 M KOH solution. The electrochemical data demonstrated that
the C/NiO-NTs display a specific capacitance of 1200 F g -1 , demonstrating that
C/NiO-NTs are promesing electrodes for capacitor applications.
Keywords: Capacitor, Nanotubes, NiO
Presenting authors email: jvqz_lp19@outlook.com