Maria Rizio

**THIRD PLACE**

Student(s): Maria Rizio

Project: Functional Polythiophene Coatings to Improve Electrode Performance in Lithium-Ion Batteries | View Poster (PDF)

Major(s): Chemical Engineering

Advisor(s): Elsa Reichmnanis

Abstract

As global initiatives to mitigate anthropogenic carbon dioxide contributions intensify, electrochemical storage systems are poised to play an integral role in the eco-friendly metamorphosis of electricity and transportation. Lithium- ion batteries have a high energy density and low self-discharge compared to other batteries utilized within electric vehicles, making them the most common battery. While advances in lithium-ion battery (LIB) technologies continue, significant obstacles to LIB adoption persist in the high-demand grid and transportation sectors, such as extending their useful life. This study explores the use of polythiophene (PTh) and its derivative, (poly(3-butylthiophene) (P3BT), as priming materials coated on the aluminum cathode current collector surface in Lithium Iron Phosphate (LFP) lithium-ion half-cells. The use of an electroconductive polymer would ensure good contact between the LFP/Active Material (Super-P Carbon Black (Sup)) and the current collector, which would protect the electrode from corrosion through its cycling. This method is expected to enhance cycling stability by preventing electrode materials decomposition, thereby extending cell life. Additionally, the high electronic conductivity of the polymers is predicted to improve cycling ability, resulting in increased Coulombic efficiency, and rate capacity. There is also evidence for the improved stabilization of the Cathode–electrolyte interphase (CEI) layer during the first several cycles that would create a protective layer outside the active material, and further limit side reactions. This preparation technique holds promise for enhancing EV battery performance and longevity, with the prospect of future research for the optimization of the technique.