Date: Tuesday, May 20, 2014
Time: 11:00 am
Speaker: William Chueh, Stanford University
Title: Ion Intercalation in Materials for Batteries and Fuel Cells
Location: 67-3111 Chemla Room
Electrochemistry plays a crucial role in virtually all energy storage and conversion technologies, such as batteries, fuel cells, and artificial leaves. Intercalation processes, such as those involving lithium and oxygen ions in solids, are ubiquitous. Unlike electrochemical reactions on metal surfaces, intercalation involves the simultaneous transfer of ions and electrons. However, despite the importance of intercalation reactions, the fundamental nature of these processes remains mysterious. We are employing in-situ spectroscopy and microscopy characterizations to shed light on the detailed kinetics and thermodynamics of intercalation reactions. In this talk, I will present new insights on two important classes of reactions (1) intercalation of oxygen ions in fuel cell electrocatalysts, and (2) intercalation of lithium ions in lithium iron phosphate olivine battery electrodes.