ORAL

SESSION: BatteryMonAM-R4	4th Intl. Symp. on Sustainable Secondary Battery Manufacturing and Recycling
Mon Oct, 23 2017	Room: Peninsula 4
Session Chairs: Katerina Aifantis; Janna Maranas; Fuqian Yang; Session Monitor: TBA

11:30: [BatteryMonAM02] Invited
Au@TiO2 Nanotube Arrays as Durable Lithium-Ion Battery Negative Electrodes
Fuqian Yang¹ ; ¹University of Kentucky, Lexington, United States;
Paper Id: 341 [Abstract]

Processing and characterization of nanostructured materials play an important role in developing the next-generation anode materials for Li-ion batteries of high energy density and capacity in order to reduce the dependence on the use of fossil fuels and thus decrease the emission of greenhouse gases. The use of nanostructured materials, in particular, TiO2-based nanocomposites has become a promising strategy for improving the electrochemical performance and safety of Li-ion batteries. To increase the electrical conductivity of TiO2 (~10-13 S�cm-1), Au@TiO2 nanotube arrays are prepared via magnetron sputtering and heat treatment. The heat treatment not only leads to the transformation of TiO2 nanotube arrays from amorphous phase to anatase phase but also results in the diffusion of Au nanoparticles. X-ray diffraction, Field Emission Scanning Electron microscope, and Transmission Electron Microscope are used to characterize the microstructural evolution of the Au@TiO2 nanotube arrays. The prepared Au@TiO2 nanotube arrays are used as anode materials in lithium ion batteries, which deliver a higher capacity than pure TiO2 nanotube arrays.

SESSION: AdvancedMaterialsMonAM-R7	Marquis International Symposium on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development(3rd Intl Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development)
Mon Oct, 23 2017	Room: Condesa IB
Session Chairs: Toshinori Okura; Carlos Enrique Schvezov; Session Monitor: TBA

15:00: [AdvancedMaterialsMonAM06] Keynote
Supercapacitors From Biomass-derived Activated Carbons
Fuqian Yang¹ ; ¹University of Kentucky, Lexington, United States;
Paper Id: 319 [Abstract]

During the past decade, increasing effort in the research of advanced energy storage technologies has led to tremendous progress in the energy storage devices, including lithium-ion batteries (LIBs) and electrochemical supercapacitors (ESCs). The ability to produce energy storage devices of high capacity/capacitance, high energy and power density promises to have a significant impact on various applications, including automobiles, portable electronics, photonics, and bioengineering. Electrochemical supercapacitors, which are mostly based on carbon materials, can have much faster charging rates and longer lives than LIBs. ESCs with large capacitances have been proposed recently and received great attention as potential energy storage systems. We use the processes of hydrothermal carbonization to prepare carbonized biomass from hemp and corn syrup; one involves the bottom-up approach, and the other involves the top-down approach. The physical activation is used to activate the carbonized biomass to produce activated carbons. The activated carbons are used to construct the electrodes of supercapacitor cells. The electrochemical performance of the activated carbons used in the supercapacitor cells is investigated. Excellent electrochemical performance metrics are achieved, including a specific capacitance of 160 F/g, and a high energy density of 19.8 Wh/kg at a power density of 21 kW/kg. A simple relationship between the specific area capacitance and the fraction of micropores is proposed, via the rule of mixtures, and is supported by the experimental results.