Effects of Additives of Ceramic Particles on the Aluminum Alloy as Galvanic Anode for Al-air Battery in Alkaline Electrolyte

Abstract

The effects of ceramic additions on the commercial aluminum alloy A356 used as anode for Al-air battery in alkaline electrolyte were examined by electrochemical tests, discharge and corresponding microstructure observations. The results indicate that the anodes with SiC or Al2O3 additive showed high corrosion rate and low-anode efficiency and low-capacity density. Corresponding microstructures indicated that the various electrochemical behaviors are attributed to ceramic particulates which changed the eutectic precipitation distribution and introduced extra interfaces.