| 초록 |
The surface area of the Li metal must be considered when attempting to suppress dendritic growth of lithium metal, as surface area can lower the effective current density. Li metal powder (LiMP) has attracted much attention for use in electrodes because of its higher surface area. However, repeated cycling, even in aging time, leads to delamination of Li particles from Cu foil and results excess dead Li particles, even in LiMP electrodes. Herein, this problem is addressed by coating thin carbon interlayers on Cu foil for LiMP electrodes. This thin carbon layer plays important roles in both maintaining the interfacial contact between Cu foil and LiMP particles and lowering overpotential in Li/Li symmetric cells, which leads to improve electrochemical performance. These enhancements are related to the enlarged surface area, as confirmed by higher adhesion of the electrode. Furthermore, the carbon materials are also believed to contribute to seeding for efficient Li nucleation. |
