Morphological control of electrodeposited lithium metal for lithium metal batteries
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이윤정 한양대 Lithium metal is employed as the anode material in next-generation high-energy battery systems such as Li-oxygen, Li-sulfur, and Li metal/ion7-9 batteries owing to its high specific capacity (3860 mAh g-1) and low electrochemical potential (-3.04 V vs SHE). However, the active use of Li metal electrodes faces considerable challenges, including low coulombic efficiency (CE), poor cycling life, and safety risks. These issues stem from the highly reactive chemical nature of Li and the dendritic physical nature of Li growth. The morphology of Li deposits is a key factor that determines the electrochemical properties and performance. Because the side reactions occur at the interface between the Li metal and the electrolyte, a large surface area of Li deposits could induce severe electrolyte consumption and poor electrochemical performance. In this regard, controlling the morphology of Li deposits to obtain a minimum surface area based on an understanding of the characteristic Li morphology evolution is essential for maximizing the performance of Li metal anodes. This presentation focuses on the physical-instability of the Li electrodeposits and covers the current cutting-edge approaches on morphological control of Li electrodeposits to achieve high performance Li metal anodes. |