Date: December 16, 2021
Time: 1900h ET
Staff Scientist, Oak Ridge National Laboratory
Webinar is open to the public
Registration is required to view the webinar. ECS membership is not required to participate.
Solid state batteries promise to reach specific energy >500 Wh/kg when a metallic Li anode is employed. They also provide an opportunity for increase in battery safety by replacing liquid electrolytes containing flammable and toxic solvents with solid state ionic conductors. Despite high expectations, there are still substantial challenges to overcome in the areas of materials development and processing/manufacturing. The key requirement for a solid state cell is the ability to maintain robust lithium/electrolyte and cathode/electrolyte interfaces over many cycles. In its basic form, this condition implies that there should be no loss of contact between electrodes and the electrolyte, and that the electrolyte should retain its integrity with cycling. Satisfying this condition is not trivial, considering dimensional changes in cell components due to mass transport and electrolyte reactions with lithium. This talk summarizes achievements in the area of solid state batteries and the remaining challenges, with partial emphasis on mechanics of materials constituting a solid state cell.
Sergiy Kalnaus is a staff scientist at the Oak Ridge National Laboratory (ORNL), where he uses experiments and computational modeling to address materials behavior at different length scales—from nanomechanics of solid electrolytes to crashworthiness of battery packs.
Dr. Kalnaus completed his MS in Mechanical Engineering at the National Technical University “Kharkiv Polytechnic Institute” in 1998, and PhD in Mechanical Engineering at the University of Nevada, Reno, in 2009. He joined ORNL as a Research Associate in 2009 and was named Research Scientist in 2012. Dr. Kalnaus is the author or coauthor of more than 50 journal publications; four patents; and “Composite Electrolytes for Facile Lithium Transport and Mechanical Strength,” a chapter in the Handbook of Solid State Batteries. As part of the ORNL team which developed an impact resistant electrolyte for batteries, he received the 2017 R&D 100 Award.
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