The commercialization of Li metal electrodes is a long-standing objective in the battery community for electric vehicles (EVs) and energy storage systems (ESSs) due to its high theoretical specific capacity of 3,860 mAh g^-1 and lowest potential of -3.040 V vs. SHE. To achieve this goal, the formation of Li dendrites and mossy Li deposition, which cause poor cycle performance and safety issues, must be resolved.

To overcome this problem, many efforts have been devoted to suppress lithium dendrite growth. Recently, we demonstrated the possibility of using mechanically surface-patterned Li-metal for Li secondary batteries. In our previous work (J. N. Park et. Al), patterned Li-metal anode showed good cycle life at low current density cycling. However, during the repeated Li plating processes with high current density, the controlled surface is filled by granular forms of Li metal, which relatively increases the possibility of side reactions caused by decomposition of electrolyte as well as reduces suppressing effect of dendrite growth.

In this study, we applied a LiNO₃ as an electrolyte additives on micro-patterned lithium metal to suppress the dendrite growth and mossy Li deposition. The effect of LiNO₃ was studied by using galvanostatic cycling test, scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and their electrochemical properties are investigated in detail.