MoSe1.48S0.52@C as cathode material for rechargeable aluminum-ion batteries and Al–S batteries

Transition metal chalcogenides (TMDCs) present an excellent initial discharge capacity for aluminum ion batteries (AIBs). However, its strong acting force with Al³⁺ and poor electrical conductivity hinder the further application of TMDCs in high-capacity AIBs. In this work, Peony-like MoSe_1.48S_0.52@C was prepared for AIBs cathode by hydrothermal method. The outsourced carbon reduces the agglomeration of MoSe_1.48S_0.52. Meanwhile, the S doping to form Se_1.48S_0.52 interlayer ligands, together with the Se presence to lower the band gap, enhances electrons transport and storage performance of aluminum. In addition, the material MoSe_1.48S_0.52@C can stably accommodate S nanoparticles and anchor aluminum sulfide to enhance the electrochemical stability of the cathode. The electrochemical test result shows that the specific capacitance of MoSe_1.48S_0.52@C reaches 300.8 mAh g^?1 at 100 mA g^?1. Note that the specific capacity for MoSe_1.48S_0.52@C@S is up to 1000 mAh g^?1 at 200 mA g^?1.