Yolk-shell structured MoS2/NiS@S heterojunction for high-performance rechargeable Al batteries

In recent years, thanks to the excellent safety performance and extremely high theoretical specific capacity of rechargeable Al batteries, the development of Al battery cathode materials has become extremely competitive. In the structural design of cathode materials, the yolk-shell structure has a large amount of storage space and abundant active sites, giving full play to the advantages of synergy in building high-performance cathode structures. The construction of MoS2/NiS@S heterojunction interface effectively improves the conductivity of monometallic sulfide as cathode and improves the discharge performance of the electrode. The surface folds and pores of the heterojunction provide excellent channels for the free insertion and release of Al3+, reducing binding energy and enhancing Al3+ binding efficiency. It has maintained a reversible capacity of 130.19 mAh g-1 at 500 mA g-1 after 2000 cycles. This provides additional ideas for the development of transition metal sulfide materials in Al batteries.