Antimony (Sb) is a promising sodium-ion anode material due to sustaining a high theoretical capacity of 660 mAh g⁻¹. However, the huge volumetric change of 293% leads to serious pulverization and poor cycling stability. Herein, we design micro-sized porous Sb (PSb) via one-step chemical vapor dealloying. The as-prepared PSb owns three-dimensional nano-skeleton and interconnected pores, which enables PSb a high tap density (2.33 g cm⁻³), high electrochemical properties and robust ability to alleviate the volumetric expansion of sodiation. The PSb anode exhibits initial charge and discharge capacities of 834 and 517 mAh g⁻¹ at a current density of 50 mA g⁻¹, corresponding to an initial Coulombic efficiency (ICE) of 61.8%. And a high capacity retention of 80% is obtained after 120 cycles at a current density of 50 mA g⁻¹. Moreover, the PSb sustains an outstanding rate performance with a capacity of 300 mAh g⁻¹ even at a large current density of 3000 mA g⁻¹. Compared with micro-Sb, the PSb exhibits a lower electrode swelling of 63.96% because the unique porous structure can effectively alleviate the volume variation and pulverization of Sb during cycling. The enhanced performance of PSb enables it as a promising anode material for advanced Sodium-Ion Batteries.

锑（Sb）由于维持660 mAh g ^-1的高理论容量，是一种很有前途的钠离子负极材料。但是，293％的巨大体积变化会导致严重的粉化和较差的循环稳定性。本文中，我们通过一步化学气相脱合金设计了微米级多孔Sb（P Sb）。所制备的P Sb具有三维纳米骨架和相互连通的孔，这使P Sb具有高振实密度（2.33 g cm ^-3），高电化学性能和减轻固态化的体积膨胀的强大能力。在P的Sb阳极表现出834和517毫安克初始充放电容量^-1在50mA g的电流密度^-1，对应的初始库仑效率（ICE）为61.8％。并且在50mA g ^-1的电流密度下120次循环之后获得80％的高容量保持率。此外，即使在3000mA g ^-1的大电流密度下，P Sb仍具有出色的速率性能，容量为300 mAh g ^-1。与微量Sb相比，P Sb的电极溶胀率更低，为63.96％，这是因为独特的多孔结构可以有效缓解循环过程中Sb的体积变化和粉化。P Sb的增强性能使其成为用于高级钠离子电池的有希望的负极材料。