In-situ synthesis of F-doped FeOOH nanorods on graphene as anode materials for high lithium storage
By Zhu, Sisi; Liang, Beirong; Mou, Xu; Liang, Xianqing; Huang, Haifu; Huang, Dan; Zhou, Wenzheng; Xu, Shuaikai; Guo, Jin
Published in Journal of Alloys and Compounds
2022
Abstract
FeOOH has emerged as an attractive anode material for Li-ion batteries (LIBs) owing to its low cost and high capacity. However, the inferior electronic conductivity and poor structural stability of FeOOH impede its practical applications. To address these issues, novel hybrids of fluorine-doped FeOOH nanorods/reduced graphene oxide (F-FeOOH NRs/rGO) were synthesized via a simple one-step hydrothermal method. F-FeOOH NRs were grown in situ simultaneously with the reduction of graphene oxide, resulting in strong interfacial coupling of F-FeOOH with rGO. Benefitting from the synergetic effect of rGO and F-doping, the optimized F-FeOOH NRs/rGO hybrid presents a stable capacity of 1207.4 mAh g−1 at the 160th cycle at 0.1 A g−1 and a remarkable rate capability of 777.5 mAh g−1 at 2 A g−1. Furthermore, even after 400 cycles at 1 A g−1, a reversible capacity of 701.4 mAh g−1 can still be maintained. With simple synthesis method and excellent Li-storage performance, the F-FeOOH NRs/rGO hybrid is expected to be a prospective material for LIB anode.