Wednesday, April 6, 2022
Weiyang (Fiona) Li, Assistant Professor,Dartmouth College, HanoverThayer School of Engineering,
The increasing energy demands of society today have led to pursuit of alternative energy storage systems that can fulfill rigorous requirements like cost-effectiveness and high storage capacities. Based fundamentally on earth-abundant sodium sources, sodium-based batteries are a promising solution in applications where existing lithium-ion technology remains less economically viable, particularly in large-scale stationary systems such as grid-level storage. Although simply replacing lithium with sodium in current lithium-ion batteries is not a viable solution due to deteriorating electron transfer in conventional intercalation cathodes, sodium is highly attractive when leveraging other battery chemistries due to its unique redox reactions. Emerging high-energy sodium batteries, such as sodium-sulfur batteries, present a series of fundamental materials challenges, hindering their widespread applications. In this talk, I will present a series of versatile strategies to realize diverse high-energy sodium battery systems through multi-faceted tactical regulations of the electrode-electrolyte interface, electrode structural design, and electrolyte engineering.