| 초록 |
As energy demand for electronic application increases, next-generation batteries having a high energy density have been required. The feasible lithium (Li)-metal electrode has been essential to realize the next-generation batteries such as Li-O2 batteries, Li-S batteries, and Li metal batteries. Li metal has the highest theoretical specific capacity low potential, and low density, therefore Li metal electrodes are considered one of the most promising candidates for anode parts of next-generation battery system. However, Li metal anode is very reactive materials, leading the uncontrolled Li growth and irreversible volume expansion. To solve these problems, controlling the Li ion (Li+) behavior is very important for expanded lifespan and high performance of Li metal batteries. 3D structured electrodes are known to that support the electrochemical performance improving of Li metal batteries some extent. The 3D electrodes can enhance the stability by preventing the volume expansion, but 3D electrodes cannot prevent the Li dendrite growth which is known to cause short-circuit and safety hazards. In this study, we applied the 3D lithiophilc electrode consisting of metal organic frameworks (MOFs). 3D functional electrodes using MOFs lead the Li+ around the lithiophilic sites due to electrostatic forces, resulting in homogeneous Li+ flux. Dendrite free Li deposition due to the uniform Li+ flux not only improve the coulombic efficiency, but reduce the volume expansion during charging/discharging. |
