Developing cathode materials (Byoung-Woo Kang, POSTECH)

Byoung-Woo Kang
2014-04-18 pm 04:00 / EB1, E207
Developing cathode materials
 
Byoung-Woo Kang
Assistant Professor, Department of Materials Science and Engineering,
POSTECH
 
 
Abstract

Energy storage can store energy for a later use and convert it to be a better quality.
With these functions, energy storage can help to transform present energy paradigm
based on fossil fuels into one based on renewable sources. Among other energy
storage technologies, lithium ion batteries are very attractive for achieving this
transformation because they cover a wide range of energy spectra from portable
devices to electric vehicles to stationary use and have high energy density.
Developing lithium ion batteries is very important task. In this talk, I will focus on
the development of cathode material, which is a key component for developing
lithium ion batteries. In the advent of new applications such as plug-in electric
vehicles (PHEV) or electric vehicles (EV), requirements of lithium ion batteries are
different from those in portable devices. A lot of attention for developing cathode
material has gone to LiFePO4 because of its excellent safety and its inexpensive cost.
However, LiFePO4 in the cell suffers from poor rate capability, which is essential
requirement in vehicles. I will discuss how to understand this challenge with respect
to materials’ point of view and show a simple approach to address this challenge.
Through this approach, LiFePO4 achieves very high power capability.