Facile Synthesis of FeS₂ Quantum-Dots/Functionalized Graphene-Sheet Composites as Advanced Anode Material for Sodium-ion Batteries

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• 作者：Yiben Shao ; Jili Yue ; Shuo Sun and Hui Xia
• 刊名：Chinese Journal of Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：35
• 期：1
• 页码：73-78
• 全文大小：967K
• ISSN：1614-7065

文摘

FeS₂ quantum-dots/functionalized graphene-sheet (QDs/FGS) composites are prepared by a facile and scalable method. The FeS₂ QDs/FGS composites can be used as anode materials for sodium-ion batteries. The FeS₂ QDs/FGS composites can achieve large specific discharge and charge capacities of 742 and 683 mAh•g⁻¹ (based on the total mass of the FeS₂ QDs/FGS composites) at the current density of 0.5 A•g⁻¹ in the first cycle, respectively, and retain a reversible charge capacity of 552 mAh•g⁻¹ after 100 cycles. The FeS₂ QDs/FGS composites can display high specific capacities of 452 and 315 mAh•g⁻¹ at the high current densities of 2 and 5 A•g⁻¹. These results indicate that the FeS₂ QDs/FGS composites have good cycle performance and high rate capability, making them promising candidates as anode material for sodium-ion batteries.