Flexible SnTe/carbon nanofiber membrane as a free-standing anode for high-performance lithium-ion and sodium-ion batteries

Min Yang; Wen Zhang; Die Su; Jiaxing Wen; Li Liu; Xianyou Wang

doi:10.1016/j.jcis.2021.07.110

Flexible SnTe/carbon nanofiber membrane as a free-standing anode for high-performance lithium-ion and sodium-ion batteries

J Colloid Interface Sci. 2022 Jan:605:231-240. doi: 10.1016/j.jcis.2021.07.110. Epub 2021 Jul 23.

Authors

Min Yang¹, Wen Zhang¹, Die Su¹, Jiaxing Wen¹, Li Liu², Xianyou Wang¹

Affiliations

¹ National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, China.
² National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, China; Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy, Changsha 410000, China. Electronic address: liulili1203@126.com.

PMID: 34329976
DOI: 10.1016/j.jcis.2021.07.110

Abstract

Flexible electrode plays a key role in flexible energy storage devices. The SnTe/C nanofibers membrane (SnTe/CNFM) with excellent mechanical flexibility has been successfully synthesized for the first time through electrospinning, and it demonstrates outstanding electrochemical performance as free-standing anode for lithium/sodium-ion batteries. The SnTe/CNFM electrode delivers a discharge capacity of 526.7 mAh g^-1 at 1000 mA g^-1 after 1000 cycles in lithium-ion half-cells and a discharge capacity of 236.5 mAh g^-1 at 500 mA g^-1 after 80 cycles in lithium-ion full-cells with a LiFePO₄ cathode. Not only that, it shows a discharge capacity of 182.7 mAh g^-1 at 200 mA g^-1 after 200 cycles in sodium-ion half-cells and a high discharge capacity of 207.0 mAh g^-1 at 500 mA g^-1 after 50 cycles in sodium-ion full-cells with a Na_0.44MnO₂ cathode. Moreover, the prepared SnTe/CNFM exhibits good mechanical flexibility. The SnTe/CNFM can still return to its original state without any breakage after bending, curling, folding and kneading. These results indicate that SnTe/CNFM is expected to become one of the promising free-standing anodes for lithium/sodium-ion batteries.

Keywords: Electrospun; Flexible; Free-standing; Lithium-ion batteries; SnTe; Sodium-ion batteries.