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.
Highlights
Nowadays, electrochemical secondary batteries are a promising technology because of their high energy conversion efficiency (Marcano et al, 2010; Etacheri et al, 2011; Vikström et al, 2013; Han et al, 2014; Deng, 2015; Song et al, 2016)
The formation of composites has been an effective method to improve the conductivity and stability of electrode materials. It is often used in alloy materials, and in metal oxide and sulfide battery systems to improve the performance of lithium and sodium storage (Liu et al, 2016; Zhang and Du, 2016; Wei et al, 2017)
FeOOH was attached to nanoscale graphene oxide (GO), and the FeOOH and GO were well-connected
Summary
Electrochemical secondary batteries are a promising technology because of their high energy conversion efficiency (Marcano et al, 2010; Etacheri et al, 2011; Vikström et al, 2013; Han et al, 2014; Deng, 2015; Song et al, 2016). The formation of composites has been an effective method to improve the conductivity and stability of electrode materials It is often used in alloy materials, and in metal oxide and sulfide battery systems to improve the performance of lithium and sodium storage (Liu et al, 2016; Zhang and Du, 2016; Wei et al, 2017). Carbon materials such as graphene, carbon nanotubes and three-dimensional foam carbon can be used to provide efficient conduction paths to improve the electrical conductivity and structural stability of electrode materials (Cao et al, 2014; Xu et al, 2016; Guo et al, 2017; Lu et al, 2017). Electrochemical impedance spectroscopy was performed on electrochemical workstation (Parstat 2273, Princeton) in a range of 0.1 Hz to 50 kHz with an amplitude of 10 mV
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
