Enhancing Interplanar Spacing in V 2 O 3 /V 3 O 7 Heterostructures to Optimize Cathode Efficiency for Zn-Ion Batteries.

The improvement of sophisticated cathode materials plays a major role in boosting the efficiency of Zn-ion batteries. These batteries have garnered considerable interest as a result of their excellent energy density and the promise of cost-effective solutions for energy storage. In this work, we present a novel approach to progress the electrochemical investigation of Zn-ion batteries by expanding the interplanar distance of layered hydrated V 2 O 3 /V 3 O 7 heterostructure nanosheets. Electrochemical investigations were conducted to assess the effectiveness of the stacked hydrated V 2 O 3 /V 3 O 7 heterostructure as a cathode component for Zn-ion batteries. The expanded interplanar space as a result of the introduction of water molecules facilitates the insertion/extraction of Zn ions, leading to significantly enhanced electrochemical characteristics. The layered hydrated V 2 O 3 /V 3 O 7 heterostructure exhibited an impressive specific capacity of 330 mAh g -1 at a current density of 0.1 A g -1 , maintaining a capacity retention of approximately 92.3% and a coulombic efficiency of 95.8% even after 2000 cycles.