Facile Synthesis of FeS 2 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: 01-01-2017
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.201600637

Abstract
FeS
2
quantum‐dots/functionalized graphene‐sheet (
QDs
/
FGS
) composites are prepared by a facile and scalable method. The
FeS
2
QDs
/
FGS
composites can be used as anode materials for sodium‐ion batteries. The
FeS
2
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
FeS
2
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
FeS
2
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
FeS
2
QDs
/
FGS
composites have good cycle performance and high rate capability, making them promising candidates as anode material for sodium‐ion batteries.