Please join us tomorrow for the ENCOMM Seminar Series at 4:15 in PRB 4138

[Leonard, Ruth A.]

2017 ENCOMM SEMINAR SERIES
Wednesday, April 12, 2017
4:15-5:15pm 4138 Physics Research Building


Structure-Property Relationship of Lithium-Ion Battery Materials

Jung-Hyun Kim
Mechanical and Aerospace Engineering
Center for Automotive Research
Institute for Materials Research
The Ohio State University
Columbus, OH 43210
Facing ever growing demands for consumer electronics and electric vehicles (EV to develop high-capacity energy storage devices. In these technologies, lithium-ion batteries (LIBs) have gained the greatest success based on its light weight, high voltage, and thereby high energy density. Therefore, LIBs have been selected as a main power source of EVs at present.
However, energy density of current LIB is not satisfactory, and many research groups are still exploring new battery materials that can deliver even higher energy and power. One of the example is LiNi0.5Mn1.5O4 (LNMO) spinel cathode that offers high operating voltage (4.75 Vvs.Li), low material cost, and excellent power capability. The LNMO crystallizes into two different symmetries depending on the occurrence of disordering/ordering of Ni2+ and Mn4+ in the lattice.
In this talk, I will demonstrate crystal structure - composition - property relationship of the LNMO spinel for LIBs. Their interfacial reactions in LIBs and several improvement strategies will be introduced as well. Finally, I will present my research programs to develop next-generation energy storage devices.

[cid:image003.jpg at 01D2B2AB.8590D960]Dr. Jung Hyun Kim joined The Ohio State University in 2016 through the Materials and Manufacturing for Sustainability (M&MS) focus area of the university's Discovery Themes Initiative. After obtaining Ph.D in Materials Science & Engineering from The University of Texas at Austin (2009), He worked as a postdoctoral researcher at the Oak Ridge National Laboratory in 2010. Then, he worked as a senior researcher at General Motors (GM) Global R&D Center in Warren Michigan from 2011 to 2016. His research interest includes energy storage and conversion materials and systems.


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