KOSEN 한인과학기술자네트워크

Welcome to the Advanced Electrochemical Technology Laboratory

 In 21^th Century, decreasing usage of fossil fuel led by depletion of resources, widespread of electronics, recognized needs for smart grid accelerated the demand of energy storage system. Lithium Ion Batteries (LIBs) had been first commercialized in 1990, dominating the rechargeable battery market and it has been used for decades. But now in the process of fabricating lithium ion battery, many researchers reported that we need to find the new, better materials for LIBs because of the prominent limitations to the capacity of graphite anode and LCO cathode, and safety issue of organic electrolyte.

 AETL has studied in electrochemical system and rechargeable battery since 2011. In AETL all members impassionedly discover new materials for electrode and new kind of electrochemical system. Thereby we contribute to breaking limitations of LIB. In present, we focus on "Anode materials for Rechargeable battery", "Inorganic electrolyte-based Rechargeable battery", and "New cation storage site in the nanostructured materials".

 AETL develops high capacity and stable Si based nanostructured material as an anode material for LIB to substitute present graphite because Si has 10 times higher theoretical capacity than that of graphite. However, Si has huge volume expansion during cycling and it is critical point to be treated for commercial usage. To reduce the volume expansion and secure its stable cycle performance, we focus on the developing of Si/SiO_x, Si-Metal alloy, and porous Si, and simple route to synthesize them.

 And we have revisited the possibility of SO₂-based inorganic liquid catholyte. This electrolyte has many attractive feature such as non-flammability, high ionic conductivity, and low-temperature operation. By applying these advantages to the nanostructured carbonaceous materials, the alkali metal (Li, Na, and etc) anode materials, and various transition metal compounds for cation electrode, we found a new mechanism with excellent electrochemical properties compared with the conventional LIBs and can provide a route for further research direction to explore a variety of SO₂-based inorganic rechargeable batteries system.

 We also investigate to develop new anode materials for LIBs such as transition metal oxides to achieve high energy density and nanostructured cathode materials for SIBs. It is well known that nanostructured materials provide unusual physical and chemical properties, compared to bulk material, because of their large surface area to volume ratio, short distance for mass transport. Furthermore, we cooperate with research teams of universities and companies worldwide, to achieve higher and detailed goals of research within extended range of intellectual partnership.
 

 This website contains whereabouts of research in AETL, including introducing of main research topics, and information about publications and lecture.

 Thank you for visiting AETL, and we hope our website to provide enough information about our present activities and future ambitions.