Additive-Driven Interfacial Engineering of Aluminum Metal Anode for Ultralong Cycling Life

Abstract

Highlights A unique electrolyte combination for rechargeable aluminum battery was fabricated using aluminum trifluoromethanesulfonate as the main salt and tetrabutylammonium chloride as an additive. The presence of additive activates the Al-anode surface toward plating/stripping and aids in the formation of a protective solid electrolyte interphase layer on the anode, resulting in a substantially suppressed anodic overpotential for 1300 cycles. The cheap, high flash point and non-corrosive nature of the electrolyte makes it commercially promising.

Keywords

• Aluminum-ion batteries
• Solid electrolyte interphase
• Electrolyte additives
• Non-aqueous electrolytes