Room Temperature Aqueous Deposition of SnSb for Na-Ion Batteries

The line compound tin antimonide (SnSb) has been proposed to achieve high capacity as an anode for sodium-ion batteries. The resulting capacity is the sum of the capacities of each constituent element, while stabilizing the microstructures of the individual components. We describe the direct electrodeposition of phase pure SnSb from an aqueous solution, resulting in a functional anode without the need for additional binders or additives. We characterize the electrodeposited SnSb to reveal the extremely crystalline and faceted morphology. We show the electrodeposited SnSb was able to realize its theoretical capacity of 752 mAh g–1 in a Na-ion half-cell.