Document Type Master's Dissertation Author Chidembo, Alfred Tawirirana email@example.com URN etd-08132010-195636 Document Title Nickel (II) phthalocyanine-multi-walled carbon nanotube hybrids as supercapacitors Degree MSc Department Chemistry Supervisor
Advisor Name Title Dr K I Ozoemena Supervisor Keywords
- tetraamino phthalocyanine
- nickel (II)
Date 2010-04-16 Availability unrestricted Abstract
The thesis examines for the first time the supercapacitive properties of three different nickel (II) phthalocyanine complexes, nickel (II) tetraamino phthalocyanine (NiTAPc), nickel (II) phthalocyanine and nickel (II) tetra tert-butylphthalocyanine as
a) nanocomposites with multiwalled carbon nanotubes and as
(b) an electropolymer supported on multiwalled carbon nanotube platform (MWCNT-polyNiTAPc).
The supercapacitive properties of nickel (II) tetraaminophthalocyanine (NiTAPc)/multi-walled carbon nanotube (MWCNT) nanocomposite films have been found to possess a maximum specific capacitance of 981 F g-1 (200 mF cm-2), a maximum power density of 700 Wkg -1, a maximum specific energy of 134 Wh kg-1 and excellent stability of over 1500 chargedischarge continuous cycling. 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. The MWCNTpolyNiTAPc electrode had a maximum (112 mF cm-2) capacitance which was higher than that observed for MWCNT-polyNi(OH)TAPc (84.9 mFcm-2) but lower that of the MWCNT-NiTAPc (200 mF cm-2).
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Please cite as follows:
Chidembo, AT 2009, Nickel (II) phthalocyanine-multi-walled carbon nanotube hybrids as supercapacitors, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-08132010-195636/ >
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