Shortly on the true horizon of Li ion batteries and adventures beyond Li ion batteries: Li oxygen and Li sulfur battery systems with Li metal anodes
Colloquium | February 21 | 4-6 p.m. | 180 Tan Hall
Doron Aurbach, Bar-Ilan University
Li ion batteries which power most of our mobile electronic devices may be considered as the most impressive success of modern electrochemistry. This energy storage & conversion technology is pushed now to the great challenge of electro-mobility, which requires high energy density, prolonged cycle-life and excellent safety features. I will review briefly the true horizon of these systems in terms of cathodes, anodes, electrolyte solutions and separators. Then I will describe our on-going research related to Li-oxygen batteries: the choice of electrolyte solutions, inevitable side reactions, the use of stationary catalysis vs. the use of red-ox mediators and their limitations, isolating the cathode side using bi-compartment cells, the control of Li-peroxide formation and following in-situ super-oxide moieties.
Finally, I will share with you data on highly stable Li-sulfur battery model systems, which include unique sulfur - carbon encapsulation cathodes and amazingly stable Li-metal anodes.
Nevertheless, I am afraid of using Li metal anodes in rechargeable batteries, since the risk is too high, as will be explained.