Nitrogen-doped multiwalled carbon nanotubes decorated with copper(I) oxide nanoparticles with enhanced capacitive properties

150 150 MIMOS Berhad


Syed Muhammad Hafiz, Khairul Anuar and Huang Nay Ming



We  report  on  the  enhanced  capacitive  properties  of  a  copper(I)  oxide nanoparticle (Cu2O NP)-decorated multiwalled carbon nanotube (MWCNT) forest with nitrogen (N) doping. A careful in situ solid-state dewetting and plasma doping method was developed that ensured homogeneous decoration and contamination-free Cu2O NPs with N doping on the nanotube sidewalls. The morphology and structure of the hybrid materials were characterised by scanning electron microscopy, transmission electron microscopy, energy-dis-persive spectroscopy, Raman spectroscopy and X-ray photoemission spectroscopy.  The electrochemical performance of the hybrid materials  was investigated by cyclic voltammetry and galvanostatic charge/discharge tests in a 0.1 M Na2SO4electrolyte. The electrochemical tests demonstrated that the Cu2O NP/N-MWCNT electrode exhibits a specific capacitance up to 132.2 F g-1 at a current density of 2.5 A g-1, which is 30% higher than that of the pure MWCNT electrode. Furthermore, the electrode could retain the specific capacitance at 85% stability over 1000 cycles. These observations along with the simple assembly method for the hybrid materials suggest that the Cu2O NP/N-MWCNT could be a promising electrode for supercapacitor applications.



Journal of Materials Science, v.52, N.8, April 2017