MSE Seminar: Chemical Preintercalation Synthesis of Versatile Electrode Materials...
Speaker: Ekaterina Pomerantseva, MSE Associate Professor, Drexel University
Title: Chemical Preintercalation Synthesis of Versatile Electrode Materials for Electrochemical Energy Storage
Chemical preintercalation synthesis approach is based on low-temperature sol-gel or precipitation process, and it involves incorporation of inorganic or organic ions into the structure of the growing oxide phase prior to electrochemical cycling. In this presentation, Dr. Pomerantseva will show that chemical preintercalation is a versatile method that can be used for the synthesis of a wide family of new oxide phases with layered structures, two-dimensional heterostructures and nanocomposites. She will present the effect of chemically preintercalated ions on electrochemical performance of these new electrode materials in intercalation batteries. Stabilization effect enabled by the insertion of electrochemically inactive ions will be discussed. Additionally, the effect of low-temperature annealing on electrochemical stability and rate capability will be shown. Morphological diversity of the chemically preintercalated oxides will be revealed by discussing the role of the precursor. Pomerantseva will show that chemical preintercalation of organic molecules can be used to prepare hybrid phases and nanocomposites. She will also demonstrate the first exfoliation of bilayered vanadium oxide leading to the formation of free-standing films composed of ultrathin nanoflakes. The materials and methods developed in this work have the potential to enable next-generation energy storage technologies.
Ekaterina Pomerantseva is an Associate Professor of Materials Science and Engineering at Drexel University. She received a B.S. degree in Materials Science in 2000; an M.S. degree in Chemistry and Materials Science in 2003 from Lomonosov Moscow State University; an M.S. degree in Biochemistry in 2005 from McGill University, and a Ph.D. degree in Solid-State Chemistry in 2007 from Lomonosov Moscow State University.
Prior to joining Drexel, Pomerantseva held postdoctoral appointments in the Institute for Systems Research at the University of Maryland College Park (2010 – 2013) and the Department of Chemistry at the University of Waterloo (2009 – 2010). She has co-authored over 70 journal papers. In 2018, Pomerantseva was selected to receive a prestigious NSF CAREER award, and she is also a Scialog Fellow and Stein Fellow.
Since 2018, Pomerantseva has been a senior investigator member of the m2M Center for Mesoscale Transport Properties, a U.S. Department of Energy, Office of Science funded Energy Frontiers Research Center. Her research interests lie in the discovery and development of new solutions and next generation systems for sustainable energy and clean environment, with the focus on materials chemistry and electrochemistry as it relates to energy storage and water treatment. Pomerantseva leads a Material Electrochemistry Group, the members of which design and apply chemical synthesis methods to obtain materials with the desired structure and advanced electrochemical properties, bridging the gap between chemistry and materials science. Her group develops chemical pathways that can be used to realize materials with tunable structures and compositions that exhibit high affinity towards ions in solutions, rapid electron and ion transport, and enhanced electrochemical stability. These properties are needed to realize electrochemically-driven energy storage and water purification devices with high performance.