| 초록 |
The technology of using lithium metal itself as the negative electrode of a lithium secondary battery is one of the most promising methods for electrochemical energy storage. However, the growth of Li dendrites, which is inevitable during charging and discharging, has caused low coulombic efficiency and safety problems. Here, we show that the electrochemical deposition behavior of Li can be greatly improved when patterned multi-component nanostructures are introduced into current collectors. It was confirmed that Li deposition occurred more effectively when the Ag-Au poly-elemental pattern was applied compared to the Ag or Au pattern was applied on the current collector. As the growth of Li dendrites is effectively inhibited, the poly-elemental nanopatterned cathode can operate for more than 200 cycles without short circuit and has a coulombic efficiency of over 90%. The excellent electrochemical performance of Li-metal anodes in current collectors with well-controlled multi-component nanopatterns underscores the importance of rational design of current collectors and opens new way for the development of long-life Li anodes. |
