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- W2277806089 abstract "Reduced graphene oxide provides analternative route to the use of single-layer graphene in functionaldevices as a result of its ability to be synthesized andfunctionalized via solution-based processing in large quantities.Graphene oxide serves as a versatile precursor to reduced grapheneoxide by offering unique opportunities to anchor nanostructuredmaterials onto its surface and serve as a 2-D conductive support.The high surface area and excellent conductivity of reducedgraphene oxide provide a suitable foundation for shuttling chargesto redox-active materials such as those used in lithium ionbatteries while maximizing the interfacial contact between theconductor (reduced graphene oxide) and redox-activenanomaterial. This dissertation first describesthe progress in elucidating the fundamental characteristics thatdrive the enhancements offered to electrode designs incorporatingreduced graphene oxide so that more rational designs are possible.The use of reduced graphene oxide as conductive support for activecathode material in lithium ion batteries led to significantlyimproved electrode kinetics, faster Li+ diffusion to the electrodesurface, and increased double layer charging. Further, the strongelectrostatic interactions between the electronegative oxygenfunctional groups inherent to graphene oxide and the transitionmetal precursors influenced dopant concentration in the activematerial. Pivoting from the finding thatreduced graphene oxide improves the diffusion of electroactivespecies, a new graphene morphology, holey graphene, was synthesizedthat offers potentially further improvement of transportcharacteristics in energy storage electrodes. Through a catalyticoxidation process, gold nanoparticles and hydroxyl radicals work intandem to etch holes into reduced graphene oxide sheets insolution. This new approach provides secondary, solution-basedcontrol over the reduced graphene oxide morphology, providing arange of opportunities to tune electrode transportcharacteristics. Based on the new insightsobtained regarding the fundamental role of reduced graphene oxidein improving electrode characteristics in lithium ion batteries,the work described in this dissertation serves as a basis forfurther exploration of graphene-based nanoassemblies. Finally, thedevelopment of a solution-based process for tuning the morphologyand degree of oxidation of reduced graphene oxide potentially opensthe door to its use in other energy or optoelectronic applications." @default.
- W2277806089 created "2016-06-24" @default.
- W2277806089 creator A5058559686 @default.
- W2277806089 date "2014-04-09" @default.
- W2277806089 modified "2023-09-27" @default.
- W2277806089 title "Reduced Graphene Oxide-Based Nanoassemblies for Energy Storage Applications" @default.
- W2277806089 hasPublicationYear "2014" @default.
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