Nickel(ii) tetra-aminophthalocyanine modified MWCNTs as potential nanocomposite materials for the development of supercapacitors

Alfred T. Chidembo, Kenneth I. Ozoemena, Bolade O. Agboola, Vinay Gupta, Gregory G. Wildgoose, Richard G. Compton

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

The supercapacitive properties of nickel(ii) tetraaminophthalocyanine (NiTAPc)/multi-walled carbon nanotube (MWCNT) nanocomposite films have been interrogated for the first time and found to possess a maximum specific capacitance of 981 ± 57 F g-1 (200 ± 12 mF cm -2), a maximum power density of 700 ± 1 Wkg-1, a maximum specific energy of 134 ± 8 Wh kg-1 and excellent stability of over 1500 charge-discharge continuous cycling. Impedimetric study proves that most of the stored energy of the MWCNT-NiTAPc nanocomposite can be accessible at high frequency (720 Hz). When compared to MWCNTs modified with unsubstituted nickel(ii) phthalocyanine (MWCNT-NiPc) or nickel(ii) tetra-tert-butylphthalocyanine (MWCNT-tBuNiPc), MWCNT-NiTAPc exhibited superior supercapacitive behaviour, possibly due to the influence of nitrogen-containing groups on the phthalocyanine rings.

Original languageBritish English
Pages (from-to)228-236
Number of pages9
JournalEnergy and Environmental Science
Volume3
Issue number2
DOIs
StatePublished - 2010

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