SnS2 Nanosheets with RGO Modification as High-Performance Anode Materials for Na-Ion and K-Ion Batteries

Leqiang Wu; Hengjia Shao; Chen Yang; Xiangmin Feng; Linxuan Han; Yanli Zhou; Wei Du; Xueqin Sun; Zhijun Xu; Xiaoyu Zhang; Fuyi Jiang; Caifu Dong

doi:10.3390/nano11081932

SnS₂ Nanosheets with RGO Modification as High-Performance Anode Materials for Na-Ion and K-Ion Batteries

Nanomaterials (Basel). 2021 Jul 27;11(8):1932. doi: 10.3390/nano11081932.

Authors

Leqiang Wu¹, Hengjia Shao¹, Chen Yang¹, Xiangmin Feng¹, Linxuan Han¹, Yanli Zhou¹, Wei Du¹, Xueqin Sun¹, Zhijun Xu¹, Xiaoyu Zhang¹, Fuyi Jiang¹, Caifu Dong¹

Affiliation

¹ School of Environmental and Material Engineering, Yantai University, Yantai 264005, China.

Abstract

To date, the fabrication of advanced anode materials that can accommodate both Na⁺ and K⁺ storage is still very challenging. Herein, we developed a facile solvothermal and subsequent annealing process to synthesize SnS₂/RGO composite, in which SnS₂ nanosheets are bonded on RGO, and investigated their potential as anodes for Na⁺ and K⁺ storage. When used as an anode in SIBs, the as-prepared SnS₂/RGO displays preeminent performance (581 mAh g^-1 at 0.5 A g^-1 after 80 cycles), which is a significant improvement compared with pure SnS₂. More encouragingly, SnS₂/RGO also exhibits good cycling stability (130 mAh g^-1 at 0.3 A g^-1 after 300 cycles) and excellent rate capability (520.8 mAh g^-1 at 0.05 A g^-1 and 281.4 mAh g^-1 at 0.5 A g^-1) when used as anode for PIBs. The well-engineered structure not only guarantees the fast electrode reaction kinetics, but also ensures superior pseudocapacitance contribution during repeated cycles, which has been proved by kinetic analysis.

Keywords: SnS2; anode; potassium-ion batteries; sodium-ion batteries.

Abstract

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