Reasonable design and synthesis of anode materials with high capacity, excellent rate capability and good cycling stability is vital for the pragmatic application of sodium-ion batteries (SIBs). Transition metal chalcogenides possess immense potential on account of their distinguished redox reversibility and high theoretical specific capacity. Herein, the hollow metal sulfide/metal selenide (NiS₂/NiSe₂) heteroboxes with rich phase boundaries have been manufactured as anode for SIBs. The lattice distortion and charge redistribution at the phase boundary of the as-prepared NiS₂/NiSe₂ heteroboxes can expose more active sites, which is profitable to the adsorption of Na⁺ and accelerate the sodium storage kinetics process, and the unique hollow porous structure is conducive to buffering the volume expansion and can facilitate the penetration of electrolyte during the repeated Na⁺ de-intercalation process. By virtue of these advantages, the NiS₂/NiSe₂ heteroboxes delivers a good rate capability, where the average capacity at 10 A g^-1 in comparison with 0.1 A g^-1 is 64.3%. Otherwise, it exhibits an ultralong reversible capacity of 292 mA h g^-1 after 2000 cycles at 10 A g^-1 with only 0.0125% average capacity decay per cycle. The rational construction of phase boundary with unique structure in this article has guiding significance for the manufacture of progressive SIBs anode materials.

合理设计和合成具有高容量、优异倍率和良好循环稳定性的负极材料对于钠离子电池（SIBs）的实用化应用至关重要。由于其卓越的氧化还原可逆性和高理论比容量，过渡金属硫属化物具有巨大的潜力。在此，具有丰富相界的中空金属硫化物/金属硒化物（NiS ₂ /NiSe ₂）杂盒已被制造为SIBs的阳极。所制备的 NiS ₂ /NiSe ₂杂盒在相边界处的晶格畸变和电荷重新分布可以暴露更多的活性位点，这有利于 Na ⁺的吸附并加速钠储存动力学过程，独特的中空多孔结构有利于缓冲体积膨胀，并在重复的 Na ⁺脱嵌过程中促进电解质的渗透。凭借这些优势，NiS ₂ /NiSe ₂杂盒提供了良好的倍率性能，与 0.1 A g ^{- 1}相比，10 A g ^{- 1}的平均容量为 64.3%。否则，它在 10 A g ^{- 1 下}循环 2000 次后表现出 292 mAh g ^{- 1}的超长可逆容量每个循环的平均容量衰减仅为 0.0125%。本文合理构建具有独特结构的相界，对渐进式SIBs负极材料的制备具有指导意义。