Coupling Lattice Strain and Sulfur Vacancy in Tin Monosulfide/Reduced Graphene Oxide Composite for High-Performance Sodium-Ion Storage
Yitong Jiang , Yihong Zheng , Lijuan Tong , Kun Zuo , Mulan Tu , Shihong Chen , Xiaochuan Chen , Junxiong Wu , Qinghua Chen , Xiaoyan Li , Yuming Chen
Energy & Environmental Materials ›› 2025, Vol. 8 ›› Issue (4) : e12891
Coupling Lattice Strain and Sulfur Vacancy in Tin Monosulfide/Reduced Graphene Oxide Composite for High-Performance Sodium-Ion Storage
Sodium-ion batteries have garnered significant attention as a cost-effective alternative to lithium-ion batteries due to the abundance and affordability of sodium precursors. However, the lack of suitable electrode materials with both high capacity and excellent stability continues to hinder their practical viability. Herein, we couple lattice strain and sulfur deficiency effects in a tin monosulfide/reduced graphene oxide composite to enhance sodium storage performance. Experimental results and theoretical calculations reveal that the synergistic effects of lattice strain and sulfur vacancies in tin monosulfide promote rapid (de)intercalation near the surface/edge of the material, thereby enhancing its pseudocapacitive sodium storage properties. Consequently, the strained and defective tin monosulfide/reduced graphene oxide composite demonstrates a high reversible capacity of 511.82 mAh g–1 at 1 A g–1 and an outstanding rate capability of 450.60 mAh g–1 at 3 A g–1. This study offers an effective strategy for improving sodium storage performance through lattice strain and defect engineering.
coupling effects / lattice strain / sodium-ion batteries / sulfur defects / tin monosulfide/reduced graphene oxide composites
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2025 The Author(s). Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
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