Self-assembled polypyrrole hierarchical porous networks as the cathode and porous three dimensional carbonaceous networks as the anode materials for asymmetric supercapacitor. (January 2021)

• Record Type: Journal Article
• Authors: Tiwari, Arjun Prasad; Chhetri, Kisan; Kim, Hyoju; Ji, Seongmin; Chae, Su-Hyeong; Kim, Taewoo; Kim, Hak Yong
• Is Part Of: Journal of energy storage. Volume 33(2021)
• Publication Date: 2021-01
• Subjects: Phytic acid -- Polypyrrole -- self-assembling -- porous carbon fibers -- gas-foamed -- asymmetrical supercapacitor device; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2020.102080
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: Phytic acid (PA) mediated stable Polypyrrole (PPy) porous network was reported. PPy@PA as the positive electrode exhibited improved electrochemical performances. 3D porous carbonaceous networks was used as a negative electrode material. Device delivered specific energy of 44.8 Wh Kg −1 at specific power of 850 W kg −1 . Abstract: Herein, we report the phytic acid (PA) mediated self-assembled polypyrrole (PPy) networks by one-pot fabrication step for energy storage application. Simultaneous interaction of PPy segments with PA via hydrogen bonding and electrostatic interaction results in the formation of hierarchical porous electrode material. Electrochemical data exhibited PA-assisted synthesized PPy network showed the improved capacitance about 775.3 F g −1 at 1 A g −1 which was significantly higher compared to its corresponding counterpart, PPy (without PA) that showed only 473.5 F g −1, indicating the key role of PA in designing the electrode materials. Three-dimensional porous electrospun carbon nanofibers (P@3D-CNFs) prepared by the modified gas-foamed method were used as a negative electrode material which exhibited 205.5 F g −1 at 1 A g −1 current density. Further, the assembled device (PPy@PA//P@3D-CNFs) exhibited delivery of a maximum specific energy (44.8 Wh kg −1 ) at a specific power (850.0 W kg −1 ) with excellent cycling stability (84%) after 5, 000 charges/discharge cycles. This work expects to deliver a new strategy to make asymmetrical supercapacitor device with high specific energy and superior stability from the PA assisted PPy networks as the cathode and porous carbon networks as the anode materials. Graphical abstract: Image, graphical abstract