KOSEN 한인과학기술자네트워크

-Lithium-ion batteries(LIBs) are one of the most popular types of rechargeable batteries for portable electronics because they have many advantages such as high energy density, no memory effect and high voltage.

    We focus on research high performance electrode and evironmentally friendly active materials. For high performance elctrode Si, Sn and Al are suitable because those have a high specific capacity than graphite. For environmentally friendly electrode, we are trying to develop agarose (which is a polysaccharide polymer material, generally extracted from seaweed) based carbonized electrode materials.


-The importance of electric vehicles (EVs) and grid-scale energy storage system (ESS) has increases to realize green energy society in near future. So, Nest-generation batteries, widely known as advanced energy storage device, have also attention to compensate small-scale lithium-ion batteries (LIBs). Innovative technology of next generation batteries, including high capacitive LIBs, all solid-state batteries, and lithium metal-based batteries, achieves scale system up and expects high specifications. 


-With the development of wearable electronics, a necessity to replace conventional rigid battery system was raised as they have possibility to cause safety issues and performance degradation in mechanically deformed state. In this regard, stretchable/flexible battery systems that can work functionally even in mechanically deformed state are required.

We focus on developing stretchable electrodes with high conductivity and low conductivity changes in deformed state. For high electrical performance, we apply percolation theory to enhance electrical conductivity; use conductive materials with different dimensions. In addition, we focus on developing packaging materials for stretchable battery system that show low air permeability with high deformability.