This paper presents the synthesis, electrochemical performance, and mechanical properties of a MoS₂/graphene composite paper as a flexible electrode for sodium-ion batteries. The composite was prepared by vacuum filtration of acid-treated MoS₂ flakes and reduced graphene oxide (rGO) in a water-isopropanol solution. The resulting composite paper was evaluated as a counter electrode in a half-cell configuration against pure Na foil. The electrode demonstrated good sodium cycling performance with a stable charge capacity of approximately 230 mAh/g and a coulombic efficiency of around 99%. Static uniaxial tensile tests showed high average strain to failure, reaching approximately 2%. The composite paper was found to have a layered structure with MoS₂ nanoflakes embedded in an rGO matrix. The MoS₂ flakes were exfoliated using chlorosulfonic acid and then reduced at elevated temperatures. The composite exhibited excellent electrochemical performance, with a high first cycle capacity of 338 mAh/g and good cycleability. The composite also showed mechanical strength of approximately 2-3 MPa and a high failure strain of around 2%. The study highlights the potential of MoS₂/graphene composite papers as flexible, binder-free electrodes for sodium-ion batteries. The composite paper was directly used as a counter electrode in a half-cell configuration, demonstrating its effectiveness as an anode in a full cell. The results suggest that the composite paper can be used for rechargeable battery applications due to its high electrochemical performance and mechanical stability. The study provides the first experimental evidence of reversible electrochemical storage of sodium in a layered self-standing MoS₂ composite electrode at room temperature. The findings open new avenues for the development of large-area, free-standing, flexible electrodes for rechargeable batteries.This paper presents the synthesis, electrochemical performance, and mechanical properties of a MoS₂/graphene composite paper as a flexible electrode for sodium-ion batteries. The composite was prepared by vacuum filtration of acid-treated MoS₂ flakes and reduced graphene oxide (rGO) in a water-isopropanol solution. The resulting composite paper was evaluated as a counter electrode in a half-cell configuration against pure Na foil. The electrode demonstrated good sodium cycling performance with a stable charge capacity of approximately 230 mAh/g and a coulombic efficiency of around 99%. Static uniaxial tensile tests showed high average strain to failure, reaching approximately 2%. The composite paper was found to have a layered structure with MoS₂ nanoflakes embedded in an rGO matrix. The MoS₂ flakes were exfoliated using chlorosulfonic acid and then reduced at elevated temperatures. The composite exhibited excellent electrochemical performance, with a high first cycle capacity of 338 mAh/g and good cycleability. The composite also showed mechanical strength of approximately 2-3 MPa and a high failure strain of around 2%. The study highlights the potential of MoS₂/graphene composite papers as flexible, binder-free electrodes for sodium-ion batteries. The composite paper was directly used as a counter electrode in a half-cell configuration, demonstrating its effectiveness as an anode in a full cell. The results suggest that the composite paper can be used for rechargeable battery applications due to its high electrochemical performance and mechanical stability. The study provides the first experimental evidence of reversible electrochemical storage of sodium in a layered self-standing MoS₂ composite electrode at room temperature. The findings open new avenues for the development of large-area, free-standing, flexible electrodes for rechargeable batteries.