Title page for ETD etd-08132010-195636


Document Type Master's Dissertation
Author Chidembo, Alfred Tawirirana
Email alfo206@yahoo.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)
  • NiTAPc
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).

Copyright 2009, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

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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