Robust SnO2−x Nanoparticle‐Impregnated Carbon Nanofibers with Outstanding Electrochemical Performance for Advanced Sodium‐Ion Batteries

• DOI: 10.1002/anie.201802672
• Publication Date: 2018-04-23T16:40:41Z
• Authors: Dingtao Ma; Yongliang Li; Hongwei Mi; Shan Luo; Peixin Zhang; Zhiqun Lin; Jianqing Li; Han Zhang
• Keywords: Carbon fibers

The sluggish sodium reaction kinetics, unstable Sn/Na2 O interface, and large volume expansion are major obstacles that impede practical applications of SnO2 -based electrodes for sodium-ion batteries (SIBs). Herein, we report the crafting homogeneously confined oxygen-vacancy-containing SnO2-x nanoparticles with well-defined void space in porous carbon nanofibers (denoted /C composites) address issues noted above advanced SIBs. Notably, composites can be readily exploited as working electrode, without need binders conductive additives. In contrast to past work, composites-based SIBs show remarkable electrochemical performance, offering high reversible capacity, ultralong cyclic stability, excellent rate capability. A discharge capacity 565 mAh g-1 at 1 is retained after 2000 cycles.