Surface‐Confined SnS2@C@rGO as High‐Performance Anode Materials for Sodium‐ and Potassium‐Ion Batteries

• DOI: 10.1002/cssc.201900719
• Publication Date: 2019-04-18T10:23:42Z
• Authors: Deping Li; Qing Sun; Yamin Zhang; Lina Chen; Zhongpu Wang; Zhen Liang; Pengchao Si; Lijie Ci
• Keywords: Carbon fibers

Potassium- (PIBs) and sodium-ion batteries (SIBs) are emerging as promising alternatives to lithium-ion owing the low cost abundance of K Na resources. However, large radius K+ Na+ lead sluggish kinetics relatively volume variations. Herein, a surface-confined strategy is developed restrain SnS2 in self-generated hierarchically porous carbon networks with an situ reduced graphene oxide (rGO) shell (SnS2 @C@rGO). The as-prepared @C@rGO electrode delivers high reversible capacity (721.9 mAh g-1 at 0.05 A ) superior rate capability (397.4 2.0 anode material SIB. Furthermore, 499.4 (0.05 cycling stability 298.1 after 500 cycles current density 0.5 were achieved PIBs, surpassing most reported non-carbonaceous materials. Additionally, electrochemical reactions between investigated elucidated.