Elektrokimyasal Enerji Depolama için MnO2/PANI Kompozitlerinin Sentezi
3rd International Eurasian Conference on Science, Engineering and Technology (EurasianSciEnTech 2021), Ankara, Türkiye, 15 - 17 Aralık 2021, ss.11, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Ankara
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.11
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
In this work, it is aimed to prepare MnO2/PANI binary composites via one-step in-situ polymerization in H2SO4
and DBSA aqueous media having high specific capacitance, high energy, and power density for supercapacitor
applications. For the synthesis of MnO2/PANI, potassium permanganate (KMnO4) is used as an oxidizing
agent for aniline polymerization and manganese (II) chloride (MnCl2) as the precursor for MnO2 nanoparticles.
Herein, in this report, the effect of aniline monomer on the capacitive behavior was investigated. The chemical
structure and morphology of synthesized MnO2/PANI composites were characterized by transmission electron
microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible (UVVis)
spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Moreover, the electrochemical
properties were characterized by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and
electrochemical impedance spectroscopy (EIS) using a Gamry Reference 3000 potentiostat/galvanostat. The
results showed that the maximum specific capacitance of MnO2/PANI reached up to 300.2 F/g at a scan rate
of 10 mV/s and 181.2 F/g at a current density of 1 A/g in a two-electrode configuration. Because of its excellent
rate capability, approximately, 93.5% of the specific capacitance was retained between current densities of 0.5
and 5 A/g. The unique morphologic structure of the nanocomposite, and synergistic effect of MnO2 and PANI
ensure the binary nanocomposite to be a promising electrode material for supercapacitor applications.