A patching reinforcement strategy for hybrid surfactants as electrolyte additives with excellent performance in aluminum-air batteries

• Published in: Journal of power sources 2023-11, Vol.584, p.233604, Article 233604
• Main Authors: Li, Chun-Ping, Zhang, Wen-Yue, Gao, Li-Xin, Zhang, Da-Quan
• Format: Article
• Language: English
• Subjects: Aluminum-air batteries; Anti-corrosion; Patching reinforcement strategy; Surfactants
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2023.233604

Surfactants attract attentions in aluminum-air batteries (AABs) due to its profound effects for anti-corrosion. This research proposes a patching reinforcement strategy using surfactants of dodecyl-β-D-maltoside (βD) and dodecyldimethyl benzyl ammonium bromide (DDBAB) to enhance the action of 8-hydroxyquinoline (8-HQ) as electrolyte additive. Hybrid surfactants consolidate the complexation of 8-HQ with aluminum, forming a dense protective film on the electrode surface. The results show that the assembled AABs has the highest capacity density of 2517 mAh·g−1 under optimizing condition, and the anode utilization rate reaches 84.5%. The corrosion protection efficiency can reach 87.2% on Al-5052 electrode in 4 M NaOH solution. This strategy provides a new method for using hybrid additives for AABs and aims to promote their commercial application. [Display omitted] •Propose and demonstrate the film formation mechanism of "Surface-enhanced".•The capacity density is increased 1.65 times and the energy density is increased 1.97 times compared with the additive-free system.•The corrosion protection efficiency can reach 87.2% the corrosion inhibitors on Al-5052 electrode in 4 M NaOH.