Fabrication and electrochemical evaluation of polyhedral PANI‐coated Co3O4 electrode for supercapacitor application. Issue 3 (17th January 2023)

• Record Type: Journal Article
• Authors: Misnon, Izan Izwan; Manickavasakam, Karnan; Nordin, Norhayati; Jose, Rajan
• Is Part Of: International journal of applied ceramic technology. Volume 20:Issue 3(2023)
• Page Start: 2030
• Page End: 2042
• Publication Date: 2023-01-17
• Subjects: conducting polymer -- electrochemical analysis -- energy storage -- hybrid supercapacitor -- pseudocapacitance; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.14328
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: In this work, conducting polymer modification on metal oxide surfaces was targeted to improve the composite conductivity and stability for electrochemical energy storage applications. Polyhedral cobalt oxide (Co3 O4 ) was prepared using a molten salt combustion method and coated with polyaniline (PANI). The composite (PANI‐CoM) was characterized using XRD, TGA, FTIR, FESEM, TEM, and BET. From cyclic voltammetry analysis in 6 M KOH, PANI‐CoM shows a high CS (985 F/g) compared to bare Co3 O4 (278 F/g), indicating that PANI coating has improved pseudocapacitive charge storability of the electrode. The electrolyte diffusion on the internal active surfaces has increased from 11% to 31%, contributed by the reduction of internal resistance by 29%. Activated carbon and ordered mesoporous carbon (OMC) were used to manufacture two sets of asymmetrical supercapacitor devices, and PANI‐CoM/OMC functioned the best performance with an ED of 22 Wh/kg at a PD of 400 W/kg.