Preparation and characterization of α-Fe2O3 : polypyrrole nanocomposite
Cui, Fujiao (2021)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2021072216833
https://urn.fi/URN:NBN:fi:amk-2021072216833
Tiivistelmä
With the development of economy, the depletion of fossil fuels and a series of related environmental problems have become more and more severe. Research on the development of new high-performance energy storage devices has attracted increasing attention recently, including research on supercapacitors with high power density, long cycle life, and low-cost characteristics. The key is to find new electrode materials and develop new synthesis methods to improve the cost-effectiveness of supercapacitors.
In this paper, α-Fe2O3 /polypyrrole (PPy) nanocomposite, as anode materials of supercapacitor, is synthesized by the combination of nano α-Fe2O3 and PPy materials and characterized with good rate capability. The best mixing ratio α-Fe2O3 /PPy nanocomposite, with best performance under different ratios of polymerization, is synthesized via electro-polymerization of which the principle is to fill the reactive monomers between the layers of the nano-layered material and allow the polymerization reaction to occur between the layers. Their composition, structure and electrochemical performance are analyzed and evaluated by using electrochemical workstation, Fourier Transform Infrared Spectrometer (FTIR) and UV-Vis Spectrometer.
The nanocomposite synthesized by electro-polymerization shows increasing power storage capacity at a scan rate 50 mV/s in the case of applied voltage 0 to 1 V and obviously enhanced capacity compared to bare PPy materials in cyclic voltammetry, unfortunately they had poor stability performance on the surface of ITO glass when did the electrochemical characterization in 0.1 mol/L KCl electrolyte. The absorbance values in UV-Vis spectroscopy of nanocomposites demonstrates that the conjugation effect between PPy gradually strengthens during the polymerization, while FT-IR spectra indicates that the chemical interaction between the active sites in PPy and α-Fe2O3 changes the polymer conformation. In the future, α-Fe2O3 /PPy nanocomposite will become promising electrode materials of supercapacitors and satisfy the increasing demand from electrochemical energy storage devices.
In this paper, α-Fe2O3 /polypyrrole (PPy) nanocomposite, as anode materials of supercapacitor, is synthesized by the combination of nano α-Fe2O3 and PPy materials and characterized with good rate capability. The best mixing ratio α-Fe2O3 /PPy nanocomposite, with best performance under different ratios of polymerization, is synthesized via electro-polymerization of which the principle is to fill the reactive monomers between the layers of the nano-layered material and allow the polymerization reaction to occur between the layers. Their composition, structure and electrochemical performance are analyzed and evaluated by using electrochemical workstation, Fourier Transform Infrared Spectrometer (FTIR) and UV-Vis Spectrometer.
The nanocomposite synthesized by electro-polymerization shows increasing power storage capacity at a scan rate 50 mV/s in the case of applied voltage 0 to 1 V and obviously enhanced capacity compared to bare PPy materials in cyclic voltammetry, unfortunately they had poor stability performance on the surface of ITO glass when did the electrochemical characterization in 0.1 mol/L KCl electrolyte. The absorbance values in UV-Vis spectroscopy of nanocomposites demonstrates that the conjugation effect between PPy gradually strengthens during the polymerization, while FT-IR spectra indicates that the chemical interaction between the active sites in PPy and α-Fe2O3 changes the polymer conformation. In the future, α-Fe2O3 /PPy nanocomposite will become promising electrode materials of supercapacitors and satisfy the increasing demand from electrochemical energy storage devices.