“One is the loneliest number: Multivalent and multielectron processes for next-generation batteries”
Rechargeable Li-ion batteries revolutionized energy storage, but the fundamental limitations imposed by intercalation chemistry and the cost associated with common components in Li-ion cells drive the need for new, less expensive batteries. The search for these so called “beyond Li-ion” technologies include systems based on alternative charge storage mechanisms that promise high theoretical capacity including multielectron redox and redox-induced solid-state phase transitions. To this end, we study sulfur conversion electrodes, multi-electron intercalation cathodes, and metal anodes based on new working ions. This talk will focus on the solid-state aspects of our work. We will discuss the hunt for a solid-state divalent ion conductor that is also electronically insulating. We will also discuss the mechanism of multielectron redox in Li-rich transition metal sulfides and its implication on the structure and spectroscopy.
