Makgopa, KEjikeme, PMOzoemena, KI2017-07-282017-07-282016-09Makgopa, 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. https://doi.org/10.1016/j.electacta.2016.07.0270013-4686http://www.sciencedirect.com/science/article/pii/S0013468616315328https://doi.org/10.1016/j.electacta.2016.07.027http://hdl.handle.net/10204/9375Copyright: 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.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.enNickel (II) tetraaminophthalocyanineGraphene oxide sheetsPseudocapacitorsArticleMakgopa, K., Ejikeme, P., & Ozoemena, K. (2016). Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor. http://hdl.handle.net/10204/9375Makgopa, K, PM Ejikeme, and KI Ozoemena "Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor." (2016) http://hdl.handle.net/10204/9375Makgopa K, Ejikeme P, Ozoemena K. Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor. 2016; http://hdl.handle.net/10204/9375.TY - Article AU - Makgopa, K AU - Ejikeme, PM AU - Ozoemena, KI AB - 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. DA - 2016-09 DB - ResearchSpace DP - CSIR KW - Nickel (II) tetraaminophthalocyanine KW - Graphene oxide sheets KW - Pseudocapacitors LK - https://researchspace.csir.co.za PY - 2016 SM - 0013-4686 T1 - Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor TI - Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor UR - http://hdl.handle.net/10204/9375 ER -