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Browsing by Author "Ejikeme, PM"

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Effects of catalyst-support materials on the performance of fuel cells

Author: Ejikeme, PM ; Makgopa, K ; Ozoemena, KI Date: Jul 2016 The operating life of a fuel cell is expected to be thousands of hours. One of the critical components of the fuel cell that will allow for such long-life cycle is the catalyst-support material. The support material is expected, amongst others, ... Read more
Electrochromic and electrochemical capacitive properties of tungsten oxide and its polyaniline nanocomposite films obtained by chemical bath deposition method

Author: Nwanya, AC ; Jafta, CJ ; Ejikeme, PM ; Ugwuoke, PE ; Reddy, MV ; Osuji, RU ; Ozoemena, KI ; Ezema, FI Date: May 2014 Polyanine and its nanocomposite WO3/PANI films were deposited on fluorine doped tin oxide (FTO) glassslides by simple chemical bath deposition method. The morphology structure of the composite film wasstudied using atomic force microscopy ... Read more
Graphene oxide-modified nickel (II) tetra-aminophthalocyanine nanocomposites for high-power symmetric pseudocapacitor

Author: Makgopa, K ; Ejikeme, PM ; Ozoemena, KI Date: Sep 2016 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 ... Read more
High-performance Mn3O4/onion-like carbon (OLC) nanohybrid pseudocapacitor: Unravelling the intrinsic properties of OLC against other carbon supports

Author: Makgopa, K ; Raju, Kumar ; Ejikeme, PM ; Ozoemena, Kenneth I Date: Jun 2017 The electrochemical performance of the tetragonal hausmannite Mn3O4, when embedded on various carbon materials, onion-like carbon (OLC), carbon nanotubes (CNT), reduced graphene oxide (RGO) and activated carbon (AC) (i.e., OLC/Mn3O4, CNT/Mn3O4, ... Read more
A high-rate aqueous symmetric pseudocapacitor based on highly graphitized onion-like carbon/birnessite-type manganese oxide nanohybrids

Author: Makgopa, K ; Ejikeme, PM ; Jafta, CJ ; Raju, Kumar ; Zeiger, M ; Presser, V ; Ozoemena, KI Date: Jan 2015 We present a study on the pseudocapacitive properties of birnessite-type MnO(sub2) grafted on highly graphitized onion-like carbon (OLC/MnO(sub2)). In a three-electrode setup, we evaluated two different substrates, namely a platinum disc and ... Read more
Nanostructured cobalt(II) tetracarboxyphthalocyanine complex supported within the MWCNT frameworks: electron transport and charge storage capabilities

Author: Pillay, S ; Pillay, J ; Ejikeme, PM ; Makgopa, K ; Ozoemena, KI Date: Feb 2015 The electrochemical redox properties of a surface-confined thin solid film of nanostructured cobalt(II) tetracarboxyphthalocyanine integrated with multiwalled carbon nanotube (nanoCoTCPc/MWCNT) have been investigated. This novel nanoCoTCPc/MWCNT ... Read more
Nanostructured manganese oxides in supercapacitors

Author: Makgopa, K ; Ejikeme, PM ; Ozoemena, KI Date: Jul 2016 The development of energy storage systems (ESSs) comes as a crucial factor when it comes to addressing the problem of energy in the world due to the rapid development of the global economy, the depletion of fossil fuels and the increase of ... Read more
Recent progress in nickel oxide-based electrodes for high-performance supercapacitors

Author: Chime, UK ; Nkele, AC ; Ezugwu, S ; Nwanya, AS ; Shinde, NM ; Kebede, Mesfin A ; Ejikeme, PM ; Maaza, M ; Ezema, FI Date: Jun 2020 In recent years, interest in nanostructured electrode materials for use in supercapacitors has been on the rise. Nickel oxide has been reported as a good candidate for supercapacitor applications due to its high theoretical capacitance and ... Read more

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Browsing by Author "Ejikeme, PM"

Browsing by Author "Ejikeme, PM"

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All of ResearchSpace

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