Cynthia Lundgren1

1, Army Research Lab, Adelphi, Maryland, United States

Interfaces in electrochemical devices are critical, they take part in controlling charge transfer rates, can affect reactivty and stability and ultimately, device performance. Li ion batteries depend on the Solid Electrolyte Interphase (SEI) to control battery stability and charge, discharge rates. Electrochemical catalyst reactivity is dependent on adsorption at the interface as well as the interface at the support. The interfaces of these materials can be tailored to optimize wanted reactions and decrease unwanted reactions. Additives in Li ion batteries have allowed operation at voltages that would otherwise cause electrode reactions with the electrolyte leading to capacity fading. Addition of plasmonic materials to catalysts can generate near and far fields that could enhance catalytic rates and lower activation barriers. In situ and operando characterization techniques are aiding in the tailoring of these interfaces. Advances in interface manipulation within the energy storage and Catalysis areas at the Army Research Lab will be discussed