Binder-free S@Ti3C2Tx sandwich structure film as a high-capacity cathode for a stable aluminum-sulfur battery

The rechargeable aluminum-sulfur (Al-S) battery is a promising alternative-energy storage device with high energy density and made of cheap raw materials. However, Al-S batteries face several obstacles, especially the shuttle effect. Herein, binder-free S@Ti3C2Tx sandwich structure film uniform sulfur dispersion was designed. two-dimensional (2D) layered material Ti3C2Tx not only has function binder conductive agent but also host for anchoring. As result, showed an initial capacity 489 mA h g?1 at 300 retained value 415 after 280 stable cycles, average Coulombic efficiency ?95%. displayed higher stability than S + cathode prepared by slurry-coating method (the 317 then decayed to 222 160 cycles). main in came from reversible redox reaction S2? S. This new 2D combined controllable electrode design paves way development batteries.