KIT | KIT-Bibliothek | Impressum | Datenschutz

Exploring the functional properties of sodium phytate doped polyaniline nanofibers modified fto electrodes for high-performance binder free symmetric supercapacitors

Ur Rahman, Sami; Röse, Philipp ORCID iD icon 1; Ul Haq Ali Shah, Anwar; Krewer, Ulrike 1; Bilal, Salma; Farooq, Shehna
1 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)


The performance of high-rate supercapacitors requires fine morphological and electrical properties of the electrode. Polyaniline (PANI), as one of the most promising materials for energy storage, shows different behaviour on different substrates. The present study reports on the surface modification of fluorine doped tin oxide (FTO) with the sodium phytate doped PANI without any binder and its utilization as a novel current collector in symmetric supercapacitor devices. The electrochemical behaviour of the sodium phytate doped PANI thin film with and without a binder on fluorine doped tin oxide (FTO) as current collector was investigated by cyclic voltammetry (CV). The electrode without a binder showed higher electrocatalytic efficiency. A symmetrical cell configuration was therefore constructed with the binder-free electrodes. The device showed excellent electrochemical performance with high specific capacities of 550 Fg$^{-1}$ at 1 Ag$^{-1}$ and 355 Fg$^{-1}$ at 40 Ag$^{-1}$ calculated from galvanostatic discharge curves. The low charge transfer and solution resistances (RCT and RS) of 7.86 Ωcm² and 3.58 × 10−1 Ωcm², respectively, and superior rate capability of 66.9% over a wide current density range of 1 Ag$^{-1}$ to 40 Ag$^{-1}$ and excellent cycling stability with 90% of the original capacity over 1000 charge/discharge cycles at 40 Ag$^{-1}$, indicated it to be an efficient energy storage device. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136944
Veröffentlicht am 06.09.2021
DOI: 10.3390/polym13142329
Zitationen: 11
Web of Science
Zitationen: 10
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST)
Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET1)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2073-4360
KITopen-ID: 1000136944
Erschienen in Polymers
Verlag MDPI
Band 13
Heft 14
Seiten Art. Nr.: 2329
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 19.07.2021
Schlagwörter polyaniline; FTO-composite; nanostructure; supercapacitor; conductivity; electrochemical study
Nachgewiesen in Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page