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Electrosynthesised Metal (Ni, Fe, Co) Oxide Films on Single‐Walled Carbon Nanotube Platforms and Their Supercapacitance in Acidic and Neutral pH Media
Author(s) -
Adekunle Abolanle S.,
Ozoemena Kenneth I.
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000597
Subject(s) - nanocomposite , cyclic voltammetry , materials science , carbon nanotube , non blocking i/o , x ray photoelectron spectroscopy , dielectric spectroscopy , supercapacitor , electrochemistry , chemical engineering , metal , electrolyte , oxide , electrode , analytical chemistry (journal) , nanotechnology , chemistry , metallurgy , organic chemistry , engineering , catalysis
Supercapacitive properties of Single‐walled carbon nanotubes/metal oxides nanocomposites (SWCNT‐MO where M=Ni, Fe, Co) have been described. The SWCNT‐MO nanocomposites was confirmed with SEM, EDX and XPS techniques. Supercapacitive properties of the modified electrodes in H 2 SO 4 and Na 2 SO 4 electrolytes was investigated using cyclic voltammetry (CV), galvanostatic constant current charge‐discharge (CD) and the electrochemical impedance spectroscopy (EIS) techniques. SWCNT‐NiO nanocomposite modified electrodes gave better supercapacitive performance with a specific capacitance of 186 mF cm −2 (or 928 F g −1 ). This value compared quite favourably and even higher than values hitherto reported in several literature.