Journal
NANO-MICRO LETTERS
Volume 11, Issue 1, Pages -Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-019-0243-7
Keywords
SnS2@C; Hollow nanospheres; Anode materials; Sodium ion batteries
Funding
- National Natural Science Foundation of China [21701144]
- China Postdoctoral Science Foundation [2016M592303, 2017T100536]
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Constructing unique and highly stable structures with plenty of electroactive sites in sodium storage materials is a key factor for achieving improved electrochemical properties through favorable sodium ion diffusion kinetics. An SnS2@carbon hollow nanospheres (SnS2@C) has been designed and fabricated via a facile solvothermal route, followed by an annealing treatment. The SnS2@C hybrid possesses an ideal hollow structure, rich active sites, a large electrode/electrolyte interface, a shortened ion transport pathway, and, importantly, a buffer space for volume change, generated from the repeated insertion/extraction of sodium ions. These merits lead to the significant reinforcement of structural integrity during electrochemical reactions and the improvement in sodium storage properties, with a high specific reversible capacity of 626.8 mAh g(-1) after 200 cycles at a current density of 0.2 A g(-1) and superior high-rate performance (304.4 mAh g(-1) at 5 A g(-1)).
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