Seminar "Nanostructured Metal-Fluorides as New Li-Ion Battery Materials From Macro to Nano to…Amorphous" by Prof. Cosandey from Uni. Rutgers
Speaker: Frederic Cosandey, Rutgers University Piscataway, NJ, USA
Title: "Nanostructured Metal-Fluorides as New Li-Ion Battery Materials FromMacro to Nano to…Amorphous"
Place: Seminar Room, CNL C-310
Date: December 4, 2014 (Tuesday)
Time: 4:00 p.m.
At the present time all cathode materials for Li-Ion batteries arebased on intercalation processes. Although fully reversible and fast,intercalation processes are limited to less than one electron transferper transition metal ion. High capacity positive electrodes materialsfor Li-ion batteries based on transition metal fluoride (CuF2, FeF2,FeF3 or FeOF) /carbon nanocomposites have been developed recently. Inthese conversion materials, high specific capacity is obtained byusing all the oxidation states of the transition metal ion duringdischarge and recharge cycles. In this talk, the processes involvedin conversion reactions will be reviewed. Some recent results of theapplication of electron energy loss spectroscopy (EELS) for valencestate determination and chemical bonding information will bepresented. Finally, benefits as well as limitations of conversioncathode materials will also be discussed.
Prof Cosandey received his PhD in Materials Science from Carnegie Mellon University. He then moved to the Materials Science Departmentat Columbia University as Prodoctoral Fellow before joining thefaculty at Rutgers University.Prof. Cosandey’s research activities are centered on atomistic studiesof defects in solids and determination of structure-propertyrelationship in materials. He is involved in the applications ofhigh-resolution electron microscopy and diffraction techniques formicrostructural studies, phase identification and defect structureanalysis in battery materials. He also specializes in the use ofelectron energy loss spectroscopy for studying charge transfer andphase transformation in Li-Ion battery materials.