Abstract To solve the problems of insufficient conductivity and volume expansion of SnS2 during cycling when applied as anode for sodium-ion batteries (SIBs), we designed flexible and self-standing SnS2/carbon nanofibers (SnS2/CNFs) film by electrospinning technology and post sulfuration, in which the ultrafine SnS2 nanoparticles (∼5 nm) are preganated in the carbon nanofibers. The three-dimensional carbon nanofibers serve as flexible scaffold with high electrical conductivity to buffer the aggregation and pulverization of SnS2 particles. The obtained flexible SnS2/CNFs film can be directly used as anode for SIBs without adding binder and carbon additive, and exhibits excellent electrochemical performance. The SnS2/CNFs delivers a high capacity of 570.8 mAh g−1 at 0.2 A g−1. Even at a high rate of 5 A g−1, a high capacity of 247.1 mAh g−1 is still achieved. It also maintains 378.9 mAh g−1 after 100 cycles at 0.5 A g−1.

中文翻译：

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用于高性能钠离子电池的柔性独立式 SnS2/碳纳米纤维阳极

摘要 为了解决 SnS2 作为钠离子电池 (SIBs) 负极在循环过程中导电性不足和体积膨胀的问题，我们通过静电纺丝技术设计了柔性自立的 SnS2/碳纳米纤维 (SnS2/CNFs) 薄膜，并在硫化，其中超细 SnS2 纳米粒子（~5 nm）被预加到碳纳米纤维中。三维碳纳米纤维作为具有高导电性的柔性支架来缓冲 SnS2 颗粒的聚集和粉碎。获得的柔性SnS2/CNFs薄膜可直接用作SIBs的阳极，无需添加粘合剂和碳添加剂，表现出优异的电化学性能。SnS2/CNFs 在 0.2 A g-1 时提供 570.8 mAh g-1 的高容量。即使在 5 A g-1 的高倍率下，也有 247 的高容量。仍然实现了 1 mAh g-1。它还在 0.5 A g-1 下循环 100 次后保持 378.9 mAh g-1。