The article presents a high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide (SnS) nanostructures supported on graphene foam (GF). The SnS nanostructures, including nanowalls, nanoflakes, and nanohoneycombs, exhibit a maximized extrinsic pseudocapacitance contribution, which is verified by kinetics analysis. The GF-SnS anode delivers a high reversible capacity of ~1,100 mAh g⁻¹ at 30 mA g⁻¹ and ~420 mAh g⁻¹ at 30 A g⁻¹, outperforming lithium-ion storage performance. The surface-dominated redox reaction in the SnS nanostructures is identified as the primary energy-storage mechanism, contributing to both high capacity and fast charging rates. The study highlights the potential of SnS nanosheets as an anode material for sodium-ion batteries, offering a paradigm shift in anode materials and providing insights into enhancing the performance of sodium-ion batteries.The article presents a high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide (SnS) nanostructures supported on graphene foam (GF). The SnS nanostructures, including nanowalls, nanoflakes, and nanohoneycombs, exhibit a maximized extrinsic pseudocapacitance contribution, which is verified by kinetics analysis. The GF-SnS anode delivers a high reversible capacity of ~1,100 mAh g⁻¹ at 30 mA g⁻¹ and ~420 mAh g⁻¹ at 30 A g⁻¹, outperforming lithium-ion storage performance. The surface-dominated redox reaction in the SnS nanostructures is identified as the primary energy-storage mechanism, contributing to both high capacity and fast charging rates. The study highlights the potential of SnS nanosheets as an anode material for sodium-ion batteries, offering a paradigm shift in anode materials and providing insights into enhancing the performance of sodium-ion batteries.