Transition metal chalcogenides have been investigated as underlying anodes for sodium ion batteries (SIBs). Nevertheless, the unsatisfactory property, which is determined by huge volume variation and low conductivity, restricts their practical applications. The design of micro-nano hierarchitectures is a resultful approach to strengthen structural stability and reaction kinetics during the discharge-charge process. Herein, urchin-like FeS₂ hierarchitectures wrapped with reduced graphene oxide and N-doped multi-wall carbon nanotubes (FeS₂@N-CNTs@rGO) are designed and synthesized by hydrothermal route. FeS₂@N-CNTs@rGO shows high capacity with 578 mAh g⁻¹ at 0.1 A g⁻¹, splendid rate property with 419 mAh g⁻¹ at 5 A g⁻¹ and preeminent capacity retention (≈100%) over 750 cycles at 2 A g⁻¹. The reversible phase transformation, capacitive Na⁺ storage behaviour and micro-nano hierarchitectures are responsible for the outstanding rate performance.

已经研究了过渡金属硫属化物作为钠离子电池（SIB）的底层阳极。然而，由大的体积变化和低电导率所确定的不令人满意的性能限制了它们的实际应用。微纳米层级结构的设计是一种在充放电过程中增强结构稳定性和反应动力学的有效方法。在本文中，通过水热法设计和合成了包裹有还原性氧化石墨烯和N掺杂的多壁碳纳米管（FeS ₂ @ N-CNTs @ rGO）的类海胆FeS ₂层次结构。FeS ₂ @ N-CNTs @ rGO在0.1 A g ^-1时显示578 mAh g ^-1的高容量，在419 mAh g时显示出色的速率特性^-1在5 A G ^-1和卓越的容量保持率（≈100％）在2 A G超过750个循环^-1。可逆相变，电容性Na ⁺存储行为和微纳层级结构是出色的速率性能的原因。