Engineering rGO/MXene Hybrid Film as an Anode Host for Stable Sodium-Metal Batteries

Sodium metal batteries have attracted extensive attentions due to their high energy density and low-cost resources. However, the realization of Na metal anodes is still hampered by intrinsic Na dendrite growth and uncontrollable volumetric expansion. Herein, a hybrid rGO/MXene film is fabricated via a filtration and spark approach, which is used as a sodiophilic anode host for stabilizing sodium-metal anode. The surface-attached MXene nanosheets could regulate the sodium deposition behavior and suppress dendrite growth, while the reduced graphene oxide scaffold provide the efficient electron transport pathways. As a result, the designed Na@rGO/MXene electrode shows excellent electrochemical performance in terms of high Coulombic efficiency, low deposition overpotential, and long-term cycling stability. Moreover, a Na3V2(PO4)(3)parallel to Na full cell with a low N/P ratio of 3.8 is realized, showing great opportunities for practical sodium-metal batteries.

Automated summary

A hybrid rGO/MXene film was fabricated to serve as a sodiophilic anode host for stabilizing sodium-metal anode, showing excellent electrochemical performance. By regulating sodium deposition behavior and suppressing dendrite growth, the electrode achieved high Coulombic efficiency and long-term cycling stability, as well as a low N/P ratio parallel to Na full cell with Na3V2(PO4)(3).