Green one-step synthesis of SnS2 quantum dots/S-doped reduced graphene oxide composite for superior lithium storage
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SnS2 has been considered as one of the most potential anode materials for lithium storage due to its high theoretical capacity. However, the SnS2-based electrodes still suffer from unsatisfied electrochemical lithium-storage performance due to the intrinsic poor conductivity, large volume change during cycles, and great irreversibility of the initial conversion reactions. Herein, SnS2 quantum dots (QDs) are uniform fixed in S-doped reduced graphene oxide (rGO) nanosheets or nanoscrolls by a simple green one-step hydrothermal method, which deliver superior lithium-storage performance, such as a high initial reversible capacity of 1151 mA h g−1 at a current density of 200 mA g−1, high capacity retention of 87.7% after 300 cycles at 500 mA g−1, and superior rate capacity of 314 mA h g−1 at 5000 mA g−1.
KeywordsSnS2 Reduced graphene oxide Quantum dots Lithium-ion battery
This work was financially supported by the Natural Science Foundation of China (grant nos. 51462032, 51863019), the Foundation for Distinguished Young Scholars of Gansu Province (17JR5RA066), the program for Changjiang Scholars, and Innovative Research Team in University (IRT15R56).
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Conflict of interest
The authors declare that they have no conflict of interest.
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