Preparation of Layered (NH4)2V6O16•H2O Nanosheets as an Anode for Li-ion Batteries

Vanadium pentoxide (V2O5) nanomaterials have been extensively investigated as promising electrode materials for rechargeable batteries due to its high theoretical specific capacity. Herein, we report the preparation of layered (NH4)(2)V6O16 center dot H2O nanosheets by intercalation of commercial V2O5 nanoparticles with ammonium ions and water molecules in aqueous solution at room temperature. The as-prepared (NH4)(2)V6O16 center dot H2O nanosheets have a size of 2-10 mu m and thickness of 50-250 nm. Importantly, when used as an anode material for Li-ion batteries (LIBs) , the (NH4)(2)V6O16 center dot H2O nanosheets exhibit much enhanced performances in comparison with commercial V2O5 nanoparticles, including large reversible discharge capacity (1148 mA.h/g at 0.1 A/g) , excellent cycling performance (a high capacity of 1002 mA.h/g at 0.1 A/g after 70 cycles) and high rate capability (reversible capabilities of 1070 mA.h/g at 0.1 A/g). The results demonstrate that the (NH4)(2)V6O16 center dot H2O nanosheets can be used as an excellent anode material for LIBs , which may be also promising for other rechargeable batteries, such as Na-ion batteries and Zn-ion batteries.

Automated summary

This study reported a method to prepare layered (NH4)2V6O16·H2O nanosheets and found that these nanosheets exhibit enhanced performance as an anode material for lithium-ion batteries compared to commercial V2O5 nanoparticles.