Synthesis and Electrochemical Property of FeOOH/Graphene Oxide Composites

Xingying Chen; Yanyang Zeng; Zehua Chen; Shuo Wang; Chengzhou Xin; Lixia Wang; Changliang Shi; Liang Lu; Chuanxiang Zhang

doi:10.3389/fchem.2020.00328

Synthesis and Electrochemical Property of FeOOH/Graphene Oxide Composites

Front Chem. 2020 Apr 30:8:328. doi: 10.3389/fchem.2020.00328. eCollection 2020.

Authors

Xingying Chen¹, Yanyang Zeng², Zehua Chen^{3

4}, Shuo Wang⁴, Chengzhou Xin⁴, Lixia Wang³, Changliang Shi³, Liang Lu³, Chuanxiang Zhang³

Affiliations

¹ School of Medicine, Henan Polytechnic University, Jiaozuo, China.
² College of Computer Science and Technology, Henan Polytechnic University, Jiaozuo, China.
³ College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, China.
⁴ School of Materials Science and Engineering, Tsinghua University, Beijing, China.

Abstract

A facile ultrasonication method was used to uniformly mix nanospindle-shaped FeOOH (80-100 nm) and a conductive matrix of graphene oxide (GO) to form FeOOH/GO composites. No carbon peak was observed in the X-ray diffraction pattern, indicating that the graphene oxide did not stack together and that the dispersion of graphene was very high. X-ray photoelectron spectroscopy (XPS) tests showed that the formation of Fe-O-C bonds played a positive role in electron transport, revealing that it has a certain impact on the electrochemical performance of FeOOH/GO. The FeOOH/GO was further characterized by TGA, and the content of GO in the synthesized sample was 6.68%. Compared with that of FeOOH, the initial discharge capacity of FeOOH/GO could reach 1437.28 mAh/g. Additionally, compared to that of pure FeOOH, the reversibility of the electrochemical reaction of FeOOH/GO was improved, and the impedance value was reduced. Finally, FeOOH/GO was used directly as a lithium-ion battery (LIB) anode material to improve the kinetics of the Lithium ions insertion/extraction process and improve ionic conductivity.

Keywords: FeOOH; FeOOH/GO; anode materials; electrochemistry performance; lithium-ion batteries.