Green one-pot synthesis of binder-free porous edge-functionalized graphitic carbon nitride/iron oxide nanoparticles nanocomposite as an outstanding electrode for supercapacitors. (December 2020)

• Record Type: Journal Article
• Authors: Yang, Zixuan; Liu, Qian; Zhang, Leiyu; Dai, Jialei; Shen, Zhihao
• Is Part Of: Journal of energy storage. Volume 32(2020)
• Publication Date: 2020-12
• Subjects: Edge-functionalized g-C3N4 -- Iron oxide -- Binder-free nanocomposite -- Charge storage; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2020.101909
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Herein, a novel and facile electrophoretic/electrochemical deposition (EPD/ECD) method is reported for the fabrication of binder-free high-performance Fe3 O4 /functionalized g-C3 N4 nanocomposite. In this method, through a simple EPD/ECD procedure, Fe3 O4 nanoparticles are in situ simultaneously synthesized onto the edge-functionalized g-C3 N4 (ef-g-C3 N4 ) sheets electrophoretically deposited onto Ni foam. For comparison, pristine Fe3 O4 nanoparticles and ef-g-C3 N4 are deposited onto Ni foam via EPD and ECD procedures, respectively. The prepared materials are fully analyzed through XRD, TGA, FT-IR, Raman, FE-SEM, TEM as well as BET/BJH techniques. These analyses results verified co-deposition of fine Fe3 O4 particles along with porous ef-g-C3 N4 sheets onto the Ni-foam cathode, and formation of Fe3 O4 @ef-g-C3 N4 @Ni foam hybrid electrode. The formation mechanism of Fe3 O4 /ef-g-C3 N4 nanocomposite through EPD/ECD was proposed and described in details. The electrochemical behaviors of the prepared electrodes were investigated as a binder-free supercapacitor electrodes. The results charge-discharge tests revealed that Fe3 O4 @ef-g-C3 N4 /NF is capable to deliver specific capacitance of 197.2 mA h g −1 at 0.5 A g −1 and cycle life of 96.1 % and 88.5 % after 4000 continuous cycling at current densities of 0.5 and 3 A g −1, respectively, whereas the pristine Fe3 O4 /NF delivered only specific capacitance of 76.9 m g −1 at 0.5 A g −1 and cycling stability of 87.6 % and 60.8 % at the similar conditions. These findings proved surprising positive synergistic contribution between Fe3 O4 and edge-functionalized g-C3 N4 to present high supercapacitive ability.