In this work, flowerlike Sb 2 S 3 microspheres have been synthesized with a simple solvothermal reaction and an effective preparation process using polypyrrole (PPy). When tested as an anode for sodium-ion batteries (SIBs), the flowerlike Sb 2 S 3 /PPy exhibits improved reversibility and cycling per-Recently, Li-ion batteries (LIBs) have played a significant role in cell phones, ultraportable laptops, and electric and hybrid electric vehicles, due to their high energy density and long cycle life. [1][2][3][4][5] However, the cost and depletion of lithium sources leading to LIBs means they cannot be regarded as sustainable materials for energy-storage systems. [6,7] In contrast, sodium-ion batteries (SIBs) have attracted considerable attention, because of the greater abundance, wider distribution, and low cost of Na, compared with Li. Although the mechanism of LIBs and SIBs is similar, it is difficult to fabricate SIBs, mainly because Na + is much heavier and the ionic radius of Na + is much larger than that of Li + , which hinders the Na + insertion and extraction from electrode materials. Furthermore, traditional graphite materials, which are widely used in LIBs as anodes, are not suitable for SIBs, because the interlayer distance is mismatched with the larger Na + . [8][9][10][11] Therefore, extensive efforts have been made to find suitable anode materials for SIBs.Metal sulfides, such as CoS, [12] FeS 2 , [13] ZnS, [14] SnS 2 , [15] MoS 2 , [16] NiS 2 , [17] Sb 2 S 3 , [18] etc., have been some of most widely investigated as anode materials for SIBs over the last several years. In particular, metal sulfides are considered as promising anodes for SIBs, because of their high theoretical capacities, unique layered structures, low redox potentials, and long cycle lifetimes. Zhang et al. [19] synthesized FeS 2 as anode material for SIBs, and the FeS 2 exhibited discharge capacities of 220 mA h g -1 after 5000 cycles at 2 A g -1 and 172 mA h g -1 even at 20 A g -1 .Wang's group [20] synthesized a sandwichlike CoS/reduced graphene oxide (CoS/rGO) composite by using the hydrothermal method. When serving as the anode material for SIBs, it [a]