Synthesis and Electrochemical Property of FeOOH/Graphene Oxide Composites

• Main Authors: Xingying Chen, Yanyang Zeng, Zehua Chen, Shuo Wang, Chengzhou Xin, Lixia Wang, Changliang Shi, Liang Lu, Chuanxiang Zhang
• Format: Article
• Language: English
• Published: Frontiers Media S.A. 2020-04-01
• Series: Frontiers in Chemistry
• Subjects: lithium-ion batteries; FeOOH; FeOOH/GO; anode materials; electrochemistry performance
• Online Access: https://www.frontiersin.org/article/10.3389/fchem.2020.00328/full

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.