High-Throughput Studies of Li-Battery Materials

Thursday, 17 October 2019: 16:00
Room 219 (The Hilton Atlanta)
E. McCalla (McGill University)
In the search for better performing battery materials, high-throughput approaches have the potential to screen large composition spaces in a short period of time and thereby greatly accelerate the development of advanced materials. The challenges are numerous both in terms of synthesis which is often done at much smaller scale than in commercial settings (e.g. milligrams) and in terms of characterization. Often times, the characterization cannot be performed in high-throughput thereby slowing down the process to be comparable with traditional routes. The McCalla group has been working on both of these aspects. The group now uses high-throughput synthesis techniques to make layered oxide cathodes (Li- and Na-ion), high-power anodes (Li-ion) and solid electrolytes. Characterization techniques now performed in high-throughput in the group include X-ray diffraction, cyclic voltammetry, and electrochemical impedance spectroscopy (for both ionic and electronic conductivities in solid electrolytes as well as impedance growth during cycling in Li-ion cells). This allows the synthesis and characterization of approximately 400 different samples per week by a small and growing research group. Herein, I will provide an overview of these techniques and show how they are now being applied to a broad array of systems of interest for Li batteries (Li-ion and all-solid).