Speakers

Significant descriptors for the bimetallic catalysts in Li-O2 Batteries

강용묵1
Yong-Mook Kang
Dongguk University
Dec. 1 11:30~12:00

Abstract

Modern technology-driven society largely relies on energy storage systems or electric vehicles for eco-friendly transportation and the use of high technology devices. Lithium rechargeable batteries are the most promising power sources because of its high energy density but still have a challenge. Graphite is the most widely used anode material in the field of lithium ion secondary battery due to its many advantages such as good cyclic performances, and high charge/discharge efficiency in the initial cycle. However, its low energy density is preventing the current lithium ion secondary battery from realizing electric vehicles or energy storage systems. So, here we will show two-fold pathways to innovatively enhance the energy density of batteries for large-scale applications.

Actually, lithium-air battery can be the real replacement of lithium ion secondary battery because of its high theoretical specific energy coming up to 11,140 Wh/kg. A major drawback of lithium-air batteries is its low round trip efficiency resulting from high thermodynamic stability of Li2O2. Various types of materials have been adopted as the catalysts to reduce potential hysteresis and thus attain high round-trip efficiency. In particular, α-MnO2 has received great attention as a catalyst for lithium-air batteries Because the relatively good catalytic activity of α-MnO2 among various metal oxides results from easy accommodation of Li2O2 inside its large 2×2 tunnel structure, many researchers have tried to vary the macrophysical properties such as porosity, surface-to-volume ratio and so on to enhance the electrochemical properties of lithium-air batteries. However, such kind of piecemeal approaches without detailed understanding on the fundamental physical properties governing the catalytic activity of materials failed to make a breakthrough in the development of commercially available catalysts. So, some of important descriptors for the catalyst of lithium-air battery will be also dealt with in this presentation.

 

Biography

Prof. Yong-Mook Kang completed his B.S. (1999), M.S. (2001), and Ph.D. (2004) in Korea Advanced Institute of Science and Technology. He has been a senior researcher in Samsung SDI Co., LTD. He is currently a full professor at Department of Energy and Materials Engineering in Dongguk University-Seoul. His research area covers electrode or catalyst materials for Li rechargeable batteries and various post Li batteries, such as Li-air battery, Na rechargeable battery and so on. To date, he has co-authored more than 100 refereed journal articles, more than 50 domestic or international patents, several articles in books or proceedings, and a textbook of nano-science and electrochemical devices. For his research achievements in energy conversion & storage materials, he was elected as a TWAS(Academy of Science for Developing Worlds) Young Affiliate for the first time in South Korea, and awarded the International Collaboration Award of Australian Research Council-2010. From 2015, he has been appointed as a RSC (Royal Society of Chemistry) fellow & representative in Korea.

 

Education

  • 2004.08, Ph. D. in Materials Science and Engineering – Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
  • 2001.02, M. S. degree in Materials Science and Engineering – Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
  • 1999.02, B. S. degree in Materials Science and Engineering – Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea

 

Professional Career

  • 2016.09-Present, Professor, Department of Energy and Materials Engineering, Dongguk University, Republic of Korea
  • 2016.08, Associate Professor, Department of Energy and Materials Engineering, Dongguk University, Republic of Korea
  • 2013.02, Associate Professor, Department of Chemistry, Dongguk University, Republic of Korea
  • 2012.12, Partner Investigator, Australian Research Council Discovery Project (with Univ. of Wollongong and Rensselaer Polytechnic Institute)
  • 2008.02, Visiting Professor, ISEM(Institute of Superconducting and Electronic Materials), University of Wollongong, Australia
  • 2012.02, Assistant Professor, Division of Advanced Materials Engineering, Kongju National University, Republic of Korea
  • 2007.08, Senior Researcher, Corporate R&D Center, Samsung SDI Co,. Ltd, Republic of Korea
  • 2007.08, External Supervisor, ISEM(Institute of Superconducting and Electronic Materials), University of Wollongong, Australia

 

Awards and Honors

  • 2015-Present, RSC(Royal Society of Chemistry) Fellow & Representative in Korea
  • 2015, WPM(World Premier Materials) Technology Competition Silver Award
  • 2015, Samsung Humantech Bronze Award
  • 2014, International Li-Air Battery Symposium Best Poster Award
  • 2012, WPM(World Premier Materials) Technology Competition Gold Award
  • 2011, Korean Electrochemical Society Presentation Award
  • 2011, Best Poster Award for Nano Energy Session of Nano Korea 2011
  • 2011, Samsung Humantech Silver Award
  • 2010, Korean Electrochemical Society Presentation Award
  • 2010, Korean Institute of Metals and Materials Poster Award
  • 2010, ARC(Australian Research Council) International Collaboration Award
  • 2010, Marquis Who’s Who World
  • 2008-2012, Young Affiliate from TWAS (The academy of sciences for the developing world)
  • 1999-2004, Research Fellowship from Korea government