Bøger af Oluwaseun John Dada

¿ The Electrochemical Reduction of Graphene Oxide Papers at the interface of metal electrode/electrolyte. The reduced graphene paper (ERGO) has Superior Electronic and Dielectric Properties (~2 orders of power) and Higher Electrical Conductivities (~5 order of power greater) of 1.61 x 10^6 S/m (ERGO), one of the highest at room temperature compared to that of the GO papers at 502 S/m. ¿ High capacity utilization (57% at 0.2C), and cycle life of Lead-Acid battery positive active material enhanced using graphene oxide and other graphene nano-sheets; first to demonstrate in-situ reduction and functionalization of graphene and the in-situ dissolution-precipitation mechanisms, that increases utilization of the PbO core for gel-zone reactions within the PbO-PbO2 core-shell of the lead-acid battery. ¿ First to establish differential agglomerate size distribution of graphene oxide papers based on shear-induced fragmentation in water mixed with other solvents of varying densities. The higher density of the mixture returns higher agglomerate sizes of graphene fragments.

Gel ¿ Crystal Theory Dissolution Precipitation MechanismGraphene Nano-Sheet EnhancementsEffect of Size and Reduction of GrapheneShear Induced Fragmentation of Graphene InterConductivity and Electro-Osmotic PhenomenaNovel Strategies for Utilization and Capacity improvement in Lead Acid Battery Technological demands in hybrid electric vehicles, large scale storage and portable power stations has furthered more research interests in Lead Acid Batteries (LAB), in addition to the advantage of power rating per cost. The LAB positive active materials (PAM), due to low utilization and life cycle, severely limits the competitiveness of the traditional battery. The combination of cathode materials with tailored graphene based additives. Electrochemical interaction of the graphene sheets which changed the reactivity of lead dioxide crystals in the gel zone. Ion transfer model was developed showing the optimization of gel zone ion transfer induced by the electrochemical activity of graphene additives. The mechanistic interfacial characteristics of graphene enhancements in LABs were further evaluated based on the capacitance of the double layer and charge transfer resistance.