Ultrathin MoS1.68Se0.32 Alloy Nanoflakes: An Intercalation-Type Positive Electrode Material for Rechargeable Aluminum-Ion Battery

Rechargeable aluminum-ion battery (RAIB), as a promising candidate for the next-generation energy storage system, engages, considerable attention because of a high theoretical specific capacity, abundant elemental source, and low cost. Nevertheless,limited applicable positive electrode material with highly reversible aluminum storage ability has been a major barrier in the pursuitf better RAIB. Herein, we prepared ultrathin MoS1.68Se0.32 alloy nanoflakes with. fonr-layer (single layer) thickness for the positive electrode of RAIB. The electrochemical performances demonstrate the feasibility of reversible Al3+ intercalation in ultrathin MOS1.68Se0.32 showing good properties. The DFT calculations shed light on the possible Al3+ intercalation sites in MoS1.68Se0.32, where the interlayer energy barriers are lowest.

Automated summary

Rechargeable aluminum-ion battery (RAIB) has gained considerable attention due to its high theoretical specific capacity, abundant elemental source, and low cost. However, the limited availability of positive electrode materials with highly reversible aluminum storage ability has hindered the development of better RAIB. In this study, researchers prepared ultrathin MoS1.68Se0.32 alloy nanoflakes as the positive electrode material for RAIB and demonstrated the feasibility of reversible Al3+ intercalation.