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oai:figshare.com:article/33916945 2026-09-18T01:04:33Z category_1 category_4 category_146 category_7 category_14 category_21 category_24 category_272 category_873 category_39 category_61 category_132 category_135 portal_63 item_type_2 month_year_09_2026

Adsorption-Driven Interfacial Engineering of Aluminum Anodes via Saponin for Enhanced Performance in Aluminum-Air Batteries Lei Guo (36221) Jiali Hua (11279278) Ankang Su (25067998) Yan Tan (131762) Qing Zhang (1802) Viswanathan S. Saji (12498541) Biophysics Biochemistry Space Science Medicine Molecular Biology Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Developmental Biology Infectious Diseases Computational Biology uniform anodic dissolution sup >–</ sup specific capacity increases severe anodic self molecular simulations indicate interfacial layer limits driven interfacial engineering density power sources 7 mah g 0 wh kg increases al utilization al anode interface active al sites concentrated alkaline media corrosion inhibition efficiency energy density increases 2 </ sub mitigating al corrosion derived adsorption layer unstable al al – al surface results demonstrate promising high practical application optimal concentration experimental characterization enhanced performance electrolyte interfaces effective strategy discharge performance containing groups alkaline aabs air batteries 15 mm Alkaline aluminum-air batteries (AABs) are promising high-energy-density power sources, but their practical application is hindered by severe anodic self-corrosion and unstable Al/electrolyte interfaces in concentrated alkaline media. Herein, saponin, a low-cost and environmentally benign amphiphilic biosurfactant, is introduced into 4 M NaOH to regulate the Al anode interface through adsorption-driven interfacial engineering. Experimental characterization and molecular simulations indicate that oxygen-containing groups in saponin interact with the Al surface through Al–O interactions, forming a saponin-derived adsorption layer. This interfacial layer limits the access of H₂O and OH^– to active Al sites, suppresses parasitic hydrogen evolution, and promotes more uniform anodic dissolution. At the optimal concentration of 15 mM, saponin achieves a corrosion inhibition efficiency of 58.9% and increases Al utilization from 47.8% to 79.4%. In full-cell tests using identical air cathodes, the specific capacity increases from 1424.9 to 2364.7 mAh g^–1, while the energy density increases from 1652.9 to 2812.0 Wh kg^–1. These results demonstrate that adsorption-driven interfacial regulation using amphiphilic molecules is an effective strategy for mitigating Al corrosion and enhancing the discharge performance of alkaline AABs. 2026-09-17T00:00:00Z Dataset Media 10.1021/acs.langmuir.6c02407.s002 https://figshare.com/articles/media/Adsorption-Driven_Interfacial_Engineering_of_Aluminum_Anodes_via_Saponin_for_Enhanced_Performance_in_Aluminum-Air_Batteries/33916945 CC BY-NC 4.0