Add time:08/17/2019         Source:sciencedirect.com

In this work, tin disulfide (SnS2) embedded in nitrogen and sulfur dual-doped carbon (denoted as SnS2/NSDC) nanofibers are synthesized using a facile electrospinning technique for the first time. The exterior of the nanofibers is decorated through the SnS2 nanosheet, and the interior of carbon nanofibers is embedded with SnS2 nanoparticles. Benefit from the unique structure and morphology, SnS2/NSDC nanofibers show excellent electrochemical performance. In Na half-cell, SnS2/NSDC nanofibers electrode show superior cycling performance and the capacity remains at 380.1 mAh g−1 at 500 mA g−1 after 200 cycles. Not only that, a capacity of 310.6 mAh g−1 still was obtained when the applied current density even increased to 4000 mA g−1, which reveals good rate performance of the SnS2/NSDC nanofibers electrode. In Na full-cell, SnS2/NSDC nanofibers electrode also show good sodium storage performance, which retained 213.4 mAh g−1 capacity after 50 cycles when cycling at 50 mA g−1. The excellent sodium storage performance indicates that the SnS2/NSDC nanofibers are one of the promising anode materials for high-performance sodium-ion batteries.

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