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Show simple item record Makgopa, K Ejikeme, PM Ozoemena, KI 2017-07-28T09:09:39Z 2017-07-28T09:09:39Z 2016-09
dc.identifier.citation Makgopa, K., Ejikeme, P.M. and Ozoemena, K.I. 2016. Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor. Electrochimica Acta, vol. 212: 876-882. en_US
dc.identifier.issn 0013-4686
dc.description Copyright: 2016 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, kindly consult the publisher's website. en_US
dc.description.abstract Pseudocapacitive properties of nickel (II) tetraaminophthalocyanine-modified graphene oxide sheets (GO/NiTAPc) composites have been studied. Microscopic and spectroscopic analysis of the GO/NiTAPc electrode material with its precursors (GO and NiTAPc) were examined using Field Emission Scanning Electron Microscopy (FESEM), High-Resolution Transmission Electron Microscopy (HRTEM), X-ray Diffraction (XRD) and UV-vis. Electrochemical properties of GO/NiTAPc composite, GO and NiTAPc electrode materials were examined using Cyclic Voltammetry (CV), Charge-Discharge (CD), and Electrochemical Impedance Spectroscopy (EIS), and are reported. A symmetrical device, fabricated with the Ni foam, of GO/NiTAPc composite showed a large specific capacitance (C(subsp)) of 163 F g(sup-1) and maximum specific energy density (Esp) of 3.6 Wh kg-1, which are much higher than those of its individual precursors of NiTAPc (60 F g(sup-1) and 1.3 Wh kg(sup-1) and GO (15 F g(sup-1) and 0.3 Wh kg(sup-1)) at 0.1 A g(sup-1). The GO/NiTAPc symmetric pseudocapacitor device showed high power density (P(subsp)) of 140.0 kW kg(sup-1) with superior retention of capacitance when subjected to a long-hour (50 h) voltage-holding test. This excellent energy storage performance of the composite materials is advantageous for the potential development of aqueous-based pseudocapacitors fabricated from metallophthalocyanine (MPc) complexes (N4-macrocyclic metal compounds) and their derivatives. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Worklist;17824
dc.subject Nickel (II) tetraaminophthalocyanine en_US
dc.subject Graphene oxide sheets en_US
dc.subject Pseudocapacitors en_US
dc.title Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor en_US
dc.type Article en_US

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