Improve electrochemical performances of SnS2/C by destroying the crystal structure
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SnS2-based materials are potential anodes of sodium ion batteries (SIBs) due to their high specific capacity, high theoretical coulombic efficiency, and low toxic. Herein, we demonstrate an effectual strategy to improve the integral electrochemical performances of SnS2/C by decreasing crystallinity; the Na ions diffuse coefficient, reversible capacity, and rate capacity were increased by a large margin. At 100 mA g−1, un-milled SnS2/C, direct-milled SnS2/C, and SnS2/C milled with NaCl were delivered about 311, 384, and 509 mAh g−1 at 100th cycle, and at 500 mA g−1, the capacity vanish ratio in corresponding SnS2/C were 0.414%, 0.552%, and 0.292% per cycle from 2nd to 100th cycle. It is expected that the simple synthesize method may provide some inspiration to SnS2-based anode research.
KeywordsSnS2 Sodium ion battery Amorphous Ball milling
We also thank the Analytical and Testing Center of Sichuan University for providing Materials studio, and we are also grateful to Daichuan Ma for his help of computational simulation.
This work was financially supported by the 973 program of Ministry of Science and Technology of the People’s Republic of China (No. 2013CB934700), the National Natural Science Foundation of China (No. 51222305 and 51673123), and the Program for New Century Excellent Talents in University (No. NCET-12-0386).
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