John Jherson Bofill

Mapúa University, Philippines

Title: Electrochemical Properties of Vanadium-doped Lithium Titanate Oxide (Li4Ti5 – xVxO12)

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Biography

John Jherson Bofill, a graduate of B.S. Material Science and Engineering from Mapúa University strives to use his extensive knowledge from researching in fields of polymer composites, energy storage materials, combinatorial material synthesis, to contribute making of materials that are green – energy capable and extends the knowledge within the disciplines of material science.

Abstract

The increasing demands for safer sources of energy triggers a need for better energy storage technologies. To do so, Lithium Titanate Oxide have been extensively researched due to its promising electrochemical properties as to change the role of graphite as an anode since it poses safety concerns. This study explores the impacts on the electrochemical properties of doping Vanadium ions (V5+) to its preferred site of Ti16d in different doping concentrations (Li4Ti5-xVxO12 x = 0, 0.005, 0.01, 0.015, 0.025, 0.05, 0.2, 0.5) and synthesized the powders through the facile solid -state route. Through both XRD and Raman spectra the emerging phases at increased doping concentrations and major peak shifts were analyzed, while Raman alone showed the change in electronic conductivity due the peak intensity. Doping of Vanadium decreases the mean particle size until it reaches the critical point and further increase in dopants increases the mean particle sizes as well. Electrochemical property tests of charge – discharge testing, rate capability, electrochemical impedance spectroscopy showed that Li4Ti4.99V0.01O12 had the best performance out of all the samples.