Scaffolded hierarchical CeVO4/V2CTx-MXene cathode for flexible quasi-solid-state aqueous zinc-ion battery

Abstract

The scaffolded hierarchical CeVO4/V2CTx-MXene composite is harvested to boost the performance of vanadium oxides in aqueous zinc-ion batteries. Benefiting from the high electronic-ion conductivity of V2CTx-MXene and the multilayered structure of the composite, CeVO4/V2CTx-Mxene cathode depicts the advantages of the acceptable zinc storage and ionic reaction kinetics. Compared with pure CeVO4, CeVO4/V2CTx-MXene cathode shows a reversible discharge capacity of 295.0 mAh g(-1) at 1 A g(-1), capacity retention of 81.6% over 3000 cycles at 5 A g(-1), and good high-rate performance of 233.5 mAh g(-1) at 8 A g(-1). The quasi-solid-state batteries of CeVO4/V2CTx-MXene demonstrate well mechanical deformability and good cycling performance. This work provides a reference for solving the problem of vanadium-based materials for aqueous zinc-ion batteries.