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Thermal stability and electrochemical performance of Polyaniline/Pr 6 O 11 composites
Author(s) -
Li Hui,
Wang Shaoxu,
Huang Zihang,
Han Liangjun,
Zhang Shihui,
Li Yini,
Tan Zhicheng
Publication year - 2014
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3206
Subject(s) - thermogravimetry , materials science , polyaniline , composite material , cyclic voltammetry , scanning electron microscope , thermal stability , dielectric spectroscopy , fourier transform infrared spectroscopy , electrochemistry , polymerization , chemical engineering , electrode , polymer , chemistry , engineering
In order to describe the influence of Pr 6 O 11 on thermal and electrochemical performance of polyaniline (PANI), PANI/Pr 6 O 11 composites were synthesized by in situ polymerization in the presence of sulfosalicylic acid (as dopant). The composites obtained was characterized by scanning electron microscope, Fourier transform infrared spectra, and X‐ray diffraction. The thermal stability of the composites was investigated by thermogravimetry and derivative thermogravimetry. Finally, the comparative analysis on the electrochemical properties of PANI/Pr 6 O 11 composites electrodes, such as cyclic voltammetry, electrochemical impedance spectroscopy, and constant current charge–discharge test, was conducted under similar conditions. Scanning electron microscope, infrared, and X‐ray diffraction results show that interaction exists between PANI and Pr 6 O 11 , and the composites are more crystalline than pure PANI. Thermogravimetry and derivative thermogravimetry analyses indicate that PANI/Pr 6 O 11 composites and pure PANI have similar thermal stability. Moreover, the studies regarded to capacitive properties show that the electrochemical performance of the composites is improved greatly when Pr 6 O 11 is added in small amount. However, with increasing the amount of Pr 6 O 11 , the electrochemical performance of the composites become worse, which indicates a large amount of Pr 6 O 11 has a negative effect on the capacitance. These results suggest that PANI is still in the conductive form after inserting the Pr 6 O 11 , and the capacitance performance of PANI can be improved only by a low percentage of Pr 6 O 11 . Copyright © 2013 John Wiley & Sons, Ltd.