Sb2Se3 nanorods with N-doped reduced graphene oxide hybrids as high-capacity positive electrode materials for rechargeable aluminum batteries
For substantially promoting the unexpected rechargeable capability induced from the dissolution of Sb2Se3 positive electrode materials in aluminum batteries, here a novel prototype of cell assembled by a hybrid of single-crystalline Sb2Se3 nanorods and N-doped reduced graphene oxide (SNG) coupled with a modified separator is developed. With this specific cell design, the hybrid positive electrode material exhibits a high discharge potential (~ 1.8 V) with a considerably high initial discharge capacity up to 343 mA h g-1 at a current density of 500 mA g-1. Owing to the alleviation of active material loss from the positive electrode, the cell with the presence of the modified separators exhibits much enhanced cycling stability. Besides, the nitrogen doping on the reduced graphene oxide is found to boost the active site in the SNG, and thus the cycle performance have been largely improved. The strategy used in this work offers a universal plateau for designing long-life cycle aluminum batteries.