（Department of Materials Science and Engineering at POSTECH）Email: [email protected]
Rechargeable Li ion batteries are widely used as power sources for portable electric and electronic devices. Recently, use of Li ion batteries has been extended to large-scale applications such as electrical vehicles and energy storage systems. In these large scale applications, high energy density of electrode materials is essential. To meet this demand, Li-excess layered lithium transition metal oxides have been of great interest because they can achieve much higher energy density ( > 250 mAh/g) than conventional LiCoO2 and its derivatives such as Ni-rich Li layered oxides by using additional oxygen redox reaction. To achieve extra capacity by using oxygen redox reaction, many efforts have been focused on either stabilizing the oxygen redox reaction with surface coatings or doping with Co in Li-excess layered materials with 3d-TMs or increasing reversible oxygen redox reaction in Li-excess materials with 4d or 5d-TMs.
In this talk, I will overview the recent progress of high capacity electrode material by using oxygen redox reactions and discuss about structural and electronic requirements for the reversible oxygen redox reaction. Finally, I will briefly present recent progress of high capacity materials based on additional oxygen redox materials in our lab.
• 2009. Ph. D, Massachusetts Institute of Technology (MIT), Boston, USA
Thesis: “Designing materials for energy storage with high power and high energy density: LiFePO4 cathode material”
• 2003. B.S., Seoul National University, Seoul, Korea
• Director, Materials Researches Center for Batteries, 2017 ~ present
• 2015.09 ~ present, Associate Professor, MSE, POSTECH
• 2011.8 ~ 2015.08, Assistant Professor, MSE, POSTECH
• 2009 ~ 2011.7, Postdoctoral Associate, DMSE, MIT
• 2003.01 ~ 2003.08, Student Researcher, Seoul National University
• Developing advanced materials for energy storage technologies such as lithium ion batteries and sodium ion batteries
• Designing novel materials for next generation energy storage technologies
• Designing solid-electrolytes for all solid-state batteries and developing all solid-state battery