Hydrothermal Synthesis of (NH₄)₂V₇O₁₆/Reduced Graphene Oxide Composite with Enhanced Storage Performance for Aqueous Lithium-Ion Batteries

Herein, a facile hydrothermal method is utilized to prepare a (NH₄)₂V₇O₁₆/reduced graphene oxide (rGO) composite. In an aqueous electrolyte, the obtained (NH₄)₂V₇O₁₆/rGO exhibits superior lithium storage characteristics compared to pure (NH₄)₂V₇O₁₆ in both the three-electrode configuration and full cell. This improvement can be ascribed to the synergistic effects of incorporation of defective oxygen and rGO modification. The present study proposes a feasible strategy for enhancing the electrochemical properties of (NH₄)₂V₇O₁₆ and demonstrates the potential of the (NH₄)₂V₇O₁₆/rGO composite for aqueous rechargeable lithium-ion batteries.