Influence of Scanning Speed on the Electrochemical and Discharge Behavior of a CeO2/Al6061 Anode for an Al–Air Battery Manufactured via Selective Laser Melting

This study investigates how scanning speed influences the electrochemical performance and discharge behavior of aluminum–air (Al–air) batteries with CeO2/Al6061 anodes fabricated through selective laser melting (SLM). Al–air batteries, celebrated for their exceptional energy density and eco-friendliness, encounter hurdles in their widespread application due to anode self-corrosion and the formation of passivation films. To address these challenges, this study integrates CeO2-reinforcing phases into Al6061 alloys and leverages SLM technology to enhance anode performance. A comprehensive analysis was conducted on the effects of varying scanning speeds (800, 900, 1000, 1100, and 1200 mm/s) on the surface morphology, density, self-corrosion rate, electrochemical performance, and discharge behavior of the anodes. The findings reveal that a scanning speed of 1000 mm/s produces anodes with optimal density, minimal self-corrosion, and outstanding electrochemical and discharge performance. Specifically, this scanning speed leads to a high discharge voltage of 1.575 V and an anode utilization rate of 72.2%, which can be attributed to the complete melting of the powder and the formation of a uniform microstructure. These insights offer valuable guidance for the development of high-performance Al–air batteries, promising extended lifespans and enhanced efficiency.