고성능 이차전지 구현을 위한 실시간 현미경 분석 연구

Abstract

Operando analyses have provided several breakthroughs in the construction of high-performance materials and devices, including energy storage systems. However, despite the advances in electrode engineering, the formidable issues of lithium intercalation and deintercalation kinetics cannot be investigated via planar observations. In this talk, I will introduce the side-view operando OM studies on anodes, for example graphite, silicon, and lithium metal that suffer lithium plating by overpotential, anomalous volumetric changes, fracture, or dendritic formation during lithiation process. This side-view observation has showed that microscale spatial variations in rate and composition control the insertion and desertion, revealing the kinetics through the whole electrode. The results of this study could enhance the fundamental understanding of the kinetics of battery materials.