Facile synthesis of polyaniline/NiCo2O4 nanocomposites with enhanced electrochemical properties for supercapacitors

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• 作者：Hui Xu ; Jun-Xia Wu ; Yong Chen ; Jun-Long Zhang ; Bao-Qian Zhang
• 关键词：PANI/NiCo2O4 ; Nanocomposites ; Supercapacitor ; Specific capacitance
• 刊名：Ionics
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：21
• 期：9
• 页码：2615-2622
• 全文大小：1,023 KB
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• 作者单位：Hui Xu (1)
  Jun-Xia Wu (1)
  Yong Chen (1)
  Jun-Long Zhang (1)
  Bao-Qian Zhang (1)
  
  1. College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760

文摘

Polyaniline/NiCo₂O₄ nanocomposites (PANI/NiCo₂O₄) with different amounts of NiCo₂O₄ (5, 8, 10, 15, and 20 wt%) were prepared via in situ chemical oxidation polymerization in the presence of the NiCo₂O₄ particles, while the NiCo₂O₄ nanoparticles were synthesized by a modified sol–gel method. The structure and morphology of PANI/NiCo₂O₄ nanocomposites were characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques, respectively. The electrochemical properties of PANI/NiCo₂O₄ nanocomposites were investigated by cyclic voltammetry, galvanostatic charge–discharge test, and electrochemical impedance spectroscopy (EIS) in 0.5 mol L? H₂SO₄ electrolyte in three-electrode system. The PANI/10 wt% NiCo₂O₄ nanocomposites show larger specific capacitance of 439.4 F g? at a current density of 5 mA cm? and lower resistance compared with the pure PANI. The charge–discharge tests showed that the PANI/NiCo₂O₄ nanocomposites possessed good cycling stability. It maintained about 66.11 % of the initial capacitance after 1000 cycles at a current density of 5 mA cm?. The results indicated that the PANI/NiCo₂O₄ nanocomposites are a promising material for supercapacitors. Keywords PANI/NiCo₂O₄ Nanocomposites Supercapacitor Specific capacitance