Synergistic 1T/2H-MoS2 hybrid phases enable exceptional aluminum-ion battery performance with high capacity and stability

Abstract

This study presents the solvothermal synthesis of 1T/2H-MoS₂ nanospheres as advanced cathodes for rechargeable aluminum-ion batteries (RAIBs). Utilizing ethanol as a solvent, the material achieves a heterophase structure that combines the high electronic conductivity of the 1T phase with the structural stability of the 2H phase. The resulting 1T/2H-MoS₂ delivers a discharge capacity of 187 mA h g⁻¹ with an impressive 99% capacity retention after 100 cycles. Density functional theory (DFT) calculations reveal the phase-dependent aluminum-ion intercalation mechanism, demonstrating the synergistic benefits of the heterophase structure in enhancing ion transport and electrochemical performance. These findings underscore the potential of solvent-driven phase engineering in the development of next-generation RAIB electrodes with tunable properties and exceptional stability.