Effect of multifunctional composite additives on the anodic hydrogen evolution reaction in alkaline Al-air batteries

• Published in: Journal of power sources 2024-07, Vol.608, p.234610, Article 234610
• Main Authors: Cai, Shaokun, Pan, Chong, Zhang, Daquan
• Format: Article
• Language: English
• Subjects: Al-air battery; Calcium citrate; Corrosion inhibitors; Self-corrosion; TX-100
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2024.234610

The alkaline Al-air battery is a kind of chemical battery exhibiting high theoretical energy density. However, the hydrogen evolution corrosion is the primary barrier to its widespread application. This work reports the inhibition effects of Triton X-100 (TX-100) and calcium citrate (Ca-citrate), as corrosion inhibitors for the Al-air battery anode in 4 M sodium hydroxide solution. It shows that the composite corrosion inhibitors have good synergistic effect with the corrosion inhibition efficiency of 81.39 %. It is found that the interfacial film is formed via the route of ‘Interface Enhancements’. Moreover, the addition of TX-100 and Ca-citrate significantly improves the discharge performance of the Al-air battery. This electrolyte regulation strategy offers a way to enhance the Al-air battery's performance in alkaline medium. [Display omitted] •The interaction mechanisms of TX-100 and Ca-citrate are explained.•The relationship between micelle concentration and corrosion inhibition is studied.•A fabricated Al-air full battery to research the parameters of Al-air batteries.•The mechanism of action of ‘Interface Enhancements’ is proposed.•The properties of battery electrolytes have been investigated.