| 초록 |
Electrochemistry plays a significant role in energy storage and conversion technologies, such as fuel cells and lithium-ion batteries. Because of porous and heterogeneous nature of the electrodes in these applications, the conventional current-voltage measurement shows certain limit in untangling complexity of electrochemical reactions (charge transfer, mass transport, chemical reactions and so on). Here in my talk, I will introduce the in-situ electrochemical platform combined with synchrotron-based X-ray spectromicroscopy which visualizes nanoscale evolution of chemical composition and structure of individual electrochemical catalyst. Within individual catalysts, spatial variations in the electrochemical reaction rate control electronic and chemical structure while reaction takes place. I will also discuss how this technique is expansively applied to other electrochemical systems in my group. |
