Engineering rGO/MXene Hybrid Film as an Anode Host for Stable Sodium-Metal Batteries
Shiyang Wang, Yang Liu, Ke Lu, Wenbin Cai, Yulin Jie, Fanyang Huang, Xinpeng Li, Ruiguo Cao, Shuhong Jiao
Abstract
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||Na full cell with a low N/P ratio of 3.8 is realized, showing great opportunities for practical sodium-metal batteries.