​We have discovered a new cathode material for non-aqueous rechargeable aluminium-ion batteries (AIBs) that outperforms most other energy storage materials in AIB literature. AIBs use electrolytes made of chloroaluminates, which are non-flammable and therefore suited to various applications. The separator ensures the electrodes do not come in contact with each other and prevents short-circuit. In addition, the cathode's layered structure helps in the reversible intercalation of ions during the battery's charge and discharge.