期刊
ENERGY STORAGE MATERIALS
卷 17, 期 -, 页码 1-11出版社
ELSEVIER
DOI: 10.1016/j.ensm.2018.08.005
关键词
Electrospinning; Free-standing, stannous sulfide; Lithium-ion batteries; Sodium-ion batteries; Anode materials
资金
- National Natural Science Foundation of China [51672234]
- Research Foundation for Hunan Youth Outstanding People from Hunan Provincial Science and Technology Department [2015RS4030]
- Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization
- Program for Innovative Research Cultivation Team in University of Ministry of Education of China [1337304]
- 111 Project [B12015]
The development of flexible energy storage devices is the key to widen the application of flexible electronics and wearable devices. Flexible electrodes with superior electrochemical performance are critical components for flexible energy storage devices. Herein, we propose a simple and versatile electrospinning strategy to prepare the SnS/C nanofibers (SnS/C NFs) film. By using SnS/C NFs film directly as a free-standing anode in both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), it can provide outstanding electrochemical performance. For LIBs, it delivers high capacities of 648 and 548mAh g(-1) at 200 and 500mAg(-1) respectively after 500 cycles. It even shows outstanding cyclability for 1000 cycles. For SIBs, it retains capacity of 481mAh g(-1) after 100 cycles at 50mAg(-1). Moreover, the capacity remains as high as 349mAh g(-1) at 200mAg(-1) after 500 cycles. The outstanding electrochemical performance is mainly attributed to the fact that the fine SnS nanoparticles dispersed in one-dimensional porous nanofibers with uniform diameters around 130 nm shorten the transport path of ions and electrons, and the presence of N-doped carbon enhanced the electrical conductivity as well as relieve the volume change caused by the alloying/de-alloying reaction. Besides, the ultra-robust mechanical flexibility of SnS/C NFs film makes it a promising anode candidate for flexible LIB and SIB in future.
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