Polyaniline grafted chitosan/<scp>GO‐CNT</scp>/<scp>Fe<sub>3</sub>O<sub>4</sub></scp> nanocomposite as a superior electrode material for supercapacitor application
Mir Ghasem Hosseini, Elham Shahryari, Pariya Yardani Sefidi
Abstract
Abstract Developing appropriate stable electroactive electrode materials for supercapacitor application is the challenging issue, which attracts enormous attention in recent decades. In this regard, Fe 3 O 4 nanoparticles are firstly synthesized on chitosan/graphene oxide‐multiwall carbon nanotubes (CS/GM/Fe 3 O 4 ). Then, polyaniline (PANI) is grafted on it via in situ chemical polymerization and named as CS/GM/Fe 3 O 4 /PANI. The as‐prepared nanocomposites are characterized by Field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, and energy dispersive X‐ray spectroscopy. The capacitive properties of the electrodes are investigated in a three electrode configuration in 0.5 M Na 2 SO 4 electrolyte by various electrochemical techniques. The specific capacitance of CS/GM/Fe 3 O 4 /PANI electrode is 1513.4 Fg −1 at 4 Ag −1 which is 1.9 times higher than that of CS/GM/Fe 3 O 4 (800 Fg −1 ). Meanwhile, the electrodes exhibit appropriate cycle life along with 99.8% and 93.95% specific capacitance at 100 Ag −1 for chitosan/GO‐CNT/Fe 3 O 4 and polyaniline grafted chitosan/GO‐CNT/Fe 3 O 4 , respectively.