Exploring the Possibility of Aluminum Plating/Stripping from a Non-Corrosive Al(OTf)3-Based Electrolyte

被引：1

作者：

Talari, Mahla ^{[1
]}

Sarapulova, Angelina ^{[1
,2
,3
]}

Zemlyanushin, Eugen ^{[1
]}

Sabi, Noha ^{[1
,4
]}

Hofmann, Andreas ^{[1
]}

Trouillet, Vanessa ^{[1
]}

Dsoke, Sonia ^{[1
,2
,3
,5
]}

机构：

[1] Karlsruhe Inst Technol KIT, Inst Appl Mat IAM, Hermann von Helmholtz Platz 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Univ Freiburg, FMF Freiburg Mat Res Ctr, Stefan Meier Str 21, D-79104 Freiburg, Germany

[3] Fraunhofer Inst Solar Energy Syst, Dep Elect Energy Storage, Heidenhofstr 2, D-79110 Freiburg, Germany

[4] Mohammed VI Polytech Univ, High Throughput Multidisciplinary Res HTMR, Lot 660 Hay Moulay Rachid, Ben Guerir 43150, Morocco

[5] Univ Freiburg, Inst Sustainable Syst Engn, INATECH, Emmy-Noether-Str 2, D-79110 Freiburg, Germany

来源：

BATTERIES & SUPERCAPS | 2025年 / 8卷 / 01期

关键词：

Aluminum batteries; Non-corrosive electrolyte; Al(OTf)(3)-based electrolyte; Al plating; Hydrogen evolution reaction; ION BATTERY; CHLORIDE; ELECTRODEPOSITION; CONDUCTIVITY; COMPLEXES; STORAGE; ANODE; ACID;

D O I：

10.1002/batt.202400317

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Rechargeable aluminum batteries offer a promising candidate for energy storage systems, due to the aluminum (Al) abundance source. However, the development of non-corrosive electrolytes, facilitating reversible Al plating/stripping, is a critical challenge to overcome. This study investigates the feasibility of Al plating on a platinum (Pt) substrate using a non-corrosive trifluoromethanesulfonate (Al(OTf)(3))/N-methylacetamide (NMA)/urea electrolyte. This electrolyte was proposed earlier as an alternative chloroaluminate-based ionic liquid, but Al plating/stripping was not proved. In this work, various techniques, including cyclic voltammetry, scanning electron microscope/energy-dispersive X-ray spectroscopy, operando optical microscopy and electrochemical quartz crystal microbalance (EQCM), gas chromatography (GC), and X-ray photoelectron spectroscopy were employed to understand the Al plating/stripping behavior. While cyclic voltammetry indicates redox activity on Pt, further analysis reveals no significant plating. Instead, hydrogen evolution reaction, promoted by the water-residue, dominates the observed current, confirmed by operando microscopy and GC measurements. EQCM studies suggest the concurrent adsorption/desorption of Al(OH)(2+) and Al3+ ions on the Pt electrode. Further drying the electrolyte reduces the hydrogen evolution, but plating of metallic Al remains elusive. These findings highlight the need for further optimization of the electrolyte composition to achieve efficient Al plating/stripping.

引用

页数：11