Seminar: Operando Methods for Revealing the Fundamental Reactions Involved in Battery Processes
Rechargeable lithium-ion batteries are part of everyday life, with widespread use in consumer electronics such as mobile phones or laptop computers, and in electric vehicles. They are based on the movement of lithium ions between a cathode and an anode through an electrolyte, and the flow of electrons that can be harvested through an external circuit. Chemical reactions occurring within the battery during charge and discharge processes are quite complex. This presentation describes the group's recent work on examining material phase changes in real-time and quantification of lithium ion transport in real-time, using nuclear magnetic resonance (NMR) and neutron depth profiling (NDP), methods the group has developed with Ohio State collaborators in the past few years. These non-destructive methods are very insightful in decoupling complex chemical processes and understanding the chemical nature of battery proceses. Lastly the presentation discusses how one can probe preferential lithium ion nucleation, trapping and transport in intermetallic materials like Li Sn , Li Si and Li Al and intercalating materials like Li(Ni,Mn,Co)O in xyxy xy 2 real-time from these methods.
About the speaker
Anne Co received her PhD in chemistry with a specialization in electrochemistry from the University of Calgary, Canada. She then joined the National Research Council Canada’s Institute for Chemical Process and Environmental Technology (NRC-ICPET) as a NSERC Visiting Fellow and was later promoted to research associate. In 2008, she was awarded a Mary Fieser Fellowship Award to continue her postodoctoral studies with Professor Cynthia Friend at Harvard University. Co’s research interest is in understanding electrode processes, mechanistic pathways of electrocatalytic reactions for applications related to energy conversion and storage. Co received an NSF-CAREER award in 2014. She currently serves as associate editor for ACS Applied Energy Materials and is on the editorial advisory board of the Journal of Applied Electrochemistry, Education Committee of The Electrochemical Society (ECS), Board of Directors of the Society for Electroanalytical Chemistry, and a member of the Physical and Analytical Electrochemistry Division of the Electrochemical Society.