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

• Published in: Chinese journal of chemistry Vol. 35; no. 1; pp. 73 - 78
• Main Authors: Shao, Yiben, Yue, Jili, Sun, Shuo, Xia, Hui
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag GmbH & Co. KGaA 2017; Wiley Subscription Services, Inc
• Subjects: FeS2; functionalized graphene‐sheet; quantum dots; sodium‐ion batteries; 功能化; 复合材料板材; 石墨; 负极材料; 量子点; 钠离子电池; 高电流密度
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.201600637

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.