The structure-directing role of graphene in composites with porous FeOOH nanorods for Li ion batteries

Hongliang Zhao; Zhifan Song; Hanxi Gao; Biqian Li; Tao Hu; Fengqin Liu; Hong Yong Sohn

doi:10.1039/d0ra07125k

The structure-directing role of graphene in composites with porous FeOOH nanorods for Li ion batteries

RSC Adv. 2020 Nov 12;10(68):41403-41409. doi: 10.1039/d0ra07125k. eCollection 2020 Nov 11.

Authors

Hongliang Zhao^{1

2}, Zhifan Song¹, Hanxi Gao¹, Biqian Li¹, Tao Hu³, Fengqin Liu¹, Hong Yong Sohn²

Affiliations

¹ School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing Beijing 100083 China liufq@ustb.edu.cn.
² Department of Materials Science and Engineering, The University of Utah Salt Lake City Utah 84112 USA.
³ Shanghai Energy New Materials Technology Co., Ltd. Shanghai 201399 China hutao@SEMCORPGlobal.com.

Abstract

Graphene sheets that contain porous iron oxides including Fe₂O₃ and FeOOH nanorods were synthesized via a one-step hydrothermal route. A novel mechanism for controlling the structure of graphene-based composites was developed. Porous FeOOH nanorods with a high capacity for electron- and ion-transport were synthesized by controlling the composition of GO dispersion. The synthesized graphene/FeOOH composite anode exhibited an excellent electrochemical performance in which a reversible capacity of 304 mA h g^-1 was reached with nearly 100% coulombic efficiency after 1000 cycles of charge and discharge under a high current rate of 5 A g^-1.