Anthraquinone-2-sulfonic acid-loaded polyaniline nanostructures: Construction of symmetric supercapacitor electrodes thereof. (10th December 2022)

• Record Type: Journal Article
• Authors: Devendrachari, Mruthyunjayachari Chattanahalli; Shimoga, Ganesh; Lee, Seok-Han; Heo, Yong Hae; Kotresh, Harish Makri Nimbegondi; Thotiyl, Musthafa Ottakam; Kim, Sang-Youn; Choi, Dong-Soo
• Is Part Of: Journal of energy storage. Volume 56:Part B(2022)
• Publication Date: 2022-12-10
• Subjects: Polyaniline -- 9, 10-Anthra quinone-2-sulfonic sodium salt -- Redox-active -- Specific capacitance -- Symmetric supercapacitor; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.106033
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Polyaniline (PANI) nanostructures were synthesized via an acid-free green route using redox-active, water-soluble 9, 10-Anthraquinone-2-sulfonic acid sodium salt (AQSA). As a counter anion for the PANI backbone, the AQSA plays an important role in polyaniline (PANI) chain growth and as a morphology regulator. The AQSA doped PANI shows pronounced specific capacitance with effective cycling stability. As-synthesized nanotubular structures of PANI_AQSA (0.5, 1.0, and 1.5) with various concentration ratios of aniline to AQSA were achieved in appreciable yield. The intrinsic physico-chemical properties were analyzed using various physico-analytical techniques such as Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive Spectroscopy (EDS), powder X-ray diffraction analysis (XRD), Fourier Transmission Infrared spectroscopy (FT-IR), X-ray Photo Electron Spectroscopy (XPS), and Raman analysis. Nanotubular structures of PANI_AQSA were analyzed using FESEM studies. The electrochemical studies, galvanostatic charge-discharge (GCD), and Electrochemical impedance spectroscopy (EIS) were methodically investigated. PANI_AQSA_1.5 portrays enhanced specific capacitance of 440 Fg −1 at 1 Ag −1 (three-electrode system) in 1 M sulphuric acid electrolyte than its regular Cl − counter ion (276 Fg −1 at 1 Ag −1 ). The fabricated symmetric PANI_AQSA//PVA_H2 SO4 //PANI_AQSA supercapacitor showed a specific capacitance of 391 Fg −1 at 1 Ag −1 with 93 % capacitance retention for ~1000 cycles. Graphical abstract: Unlabelled Image Highlights: Mineral acid-free synthesis of polyaniline (PANI) using "AQSA". Detailed electrochemical investigation of PANI_AQSA systems. SSPANI_AQSA_1.5//PVA_H2 SO4 // SSPANI_AQSA_1.5 delivers 396 Fg −1 at 1 Ag −1 . High-capacity retention of 93 % even after 1000 cycles.