Browsing by Author "Anyanwu, Michael Nnamdi"

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    Investigation into graphene as an electrode material in microbial fuel cells bioelectricity generation
    (Federal University of Technology, Owerri, 2025-05) Anyanwu, Michael Nnamdi
    The study investigates the potential of Graphene as an electrode coating material in microbial fuel cells for bioelectricity generation as well as a comparison with other electrode coating materials as copper, oxides, fluorides, carbonates, hydrocarbons, and powdered metal. Driven by the demand for materials with superior mechanical and thermal properties in the realm of advancing technology. Rigorous testing, such as mechanical, physical, chemical, electrical resistance, and defect inspections, were conducted on a Graphene sheet (0.70 x 1200 mm) and compared with copper, carbon isotope values, and NIS standards (NIS-119:1984 and NIS487:2010). State-of-the-art laboratory equipment, such as an atomic absorption spectrometer, coating thickness gauge, universal tensile machine, and defect inspection system, was employed. The findings indicate that most elements in the graphene material align well with standard values, affirming its suitability for intended applications. However, manganese exceeds the standard limit, necessitating further scrutiny and potential refinement in the production process. In the ultimate tensile strength test, graphene surpasses the NIS requirement of 175, registering an impressive 182. The electrical resistivity values also showcase favorable results, with graphene exhibiting 0.02610-6 Ohm/cm compared to the NIS standard of 0.03410-5 Ohm/cm. Impact resistance, a critical parameter, demonstrates graphene's robustness with a measured value of 5 J, exceeding the NIS range of 2 J - 5 J. The gloss result for graphene falls within the specified NIS requirement of 40-60%, recording 58%. This research significantly contributes to our understanding of graphene’s applicability. It provides valuable insights for optimized production processes and identifies potential applications that demand enhanced mechanical properties. The observed discrepancies, particularly the elevated manganese level, highlight areas for further investigation and process refinement. Overall, the study underscores graphene’s promising role in microbial fuel cells and sets the stage for continued advancements in material science and bioelectricity generation technologies.