Synergistically enhanced sodium/potassium ion storage performance of SnSb alloy particles confined in three-dimensional carbon framework

• Published in: Ionics Vol. 26; no. 10; pp. 5019 - 5028
• Main Authors: Zhao, Hanqing, Zhuang, Chenfei, Xu, Junmin, Zhang, Zhuangfei, Shen, Weixia, Tang, Haibing, Wang, Ye, Xu, Tingting, Wang, Xinchang, Li, Xinjian
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2020; Springer Nature B.V
• Subjects: Anodes; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Cycles; Electrochemistry; Electrode materials; Energy Storage; Heat treatment; Ion storage; Optical and Electronic Materials; Original Paper; Particulate composites; Renewable and Green Energy; Thermal reduction; Sodium/potassium-ion battery; Anode; SnSb alloy; Three-dimensional carbon framework
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-020-03641-2

In this work, an efficient composite of SnSb alloy particles confined in three-dimensional porous carbon framework (SnSb@C) is rationally designed and fabricated by means of NaCl template-assisted in situ freeze-drying treatment and subsequent thermal reduction method. Benefit from rational material design and the excellent structural features of the active materials, the SnSb@C can deliver a high initial reversible capacity of 457 mA h g −1 at 100 mA g −1 , and excellent cycling stability with capacity retention of 84% after 200 cycles at 0.1 A g −1 , when evaluated as an anode material for SIBs. Meanwhile, the SnSb@C electrode can also deliver a high reversible discharge capacity of 293 mA h g −1 at 100 mA g −1 after 100 cycles in PIBs with good rate capability and impressive cycling performance. These results demonstrated that the SnSb@C composite is a promising anode material for future high-performance SIBs and PIBs.