Metal–organic framework derived porous CuO/Cu2O composite hollow octahedrons as high performance anode materials for sodium ion batteries

Abstract

Porous CuO/Cu₂O composite hollow octahedrons were synthesized simply by annealing Cu-based metal–organic framework templates. When evaluated as anode materials for sodium ion batteries, they exhibit a high maximum reversible capacity of 415 mA h g⁻¹ after 50 cycles at 50 mA g⁻¹ with excellent cycling stability and good rate capability.