Few-layered ultra-small MoS2 nanosheet cathode for high-performance rechargeable aluminum-ion battery

Abstract

We report novel few-layered ultra-small MoS₂ nanosheets, which significantly enhance kinetic performance and structural stability when employed as the cathode in the aluminum-ion battery (AIB). During Al³⁺ insertion, the few-layered structure weakens the electrostatic repulsion and the small size reduces the mechanical stress. Moreover, the high specific surface area exposes more active sites and increases the contact area between the active material and the electrolyte, shortening the ion transport distance.