Asymmetric polyoxometalate-polypyrrole composite electrode material for electrochemical energy storage supercapacitors

Anandan Vannathan, Anjana and Chandewar, Pranay R. and Shee, Debaprasad and Sankar Mal, Sib (2022) Asymmetric polyoxometalate-polypyrrole composite electrode material for electrochemical energy storage supercapacitors. Journal of Electroanalytical Chemistry, 904. pp. 1-12. ISSN 1572-6657

[img] Text
Journal_of_Electroanalytical_Chemistry.pdf - Published Version
Restricted to Registered users only

Download (3MB) | Request a copy


Nowadays, metal-oxides impregnated conducting polymers as electrode materials are attracted much attention due to their higher stability. Here, the metal-oxide cluster, polyoxometalate (K5H2[PV4W8O40]·11H2O, PV4W8), was introduced into the polypyrrole (PPy) matrix to overcome the polymers stability issues, and thus, the resulting novel PV4W8/PPy (symmetric) composite electrode has been reported. XPS confirmed the presence of all atoms on the polymer backbone with respective oxidation states. Nevertheless, doping of PV4W8 on the conductive PPy matrix's surface can affectively improve the ion's transfer. Finally, the asymmetric PV4W8-PPy/PPy composite exhibits a prodigious specific capacitance of 291 F g−1, larger than the PPy (90.01 F g−1) and PV4W8 (39.03 F g−1) at 0.4 A g−1 current density. The PV4W8-PPy/PPy (asymmetric) electrode showed excellent cycle stability. However, a symmetric supercapacitor device based on PV4W8/PPy composite possesses a specific capacitance of 195.27 F g−1 and an energy density of 8.94 Wh kg−1 at the same current density as PV4W8-PPy/PPy (asymmetric) electrode with remarkable cycle stability. © 2021 Elsevier B.V.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Shee, Debaprasad
Item Type: Article
Additional Information: A. A. V. thanked the National Institute of Technology Karnataka for financial aid to carry out the research.
Uncontrolled Keywords: Asymmetric; cyclic stability; Polyoxometalate; Polypyrrole; Supercapacitor
Subjects: Chemistry
Chemical Engineering
Divisions: Department of Chemical Engineering
Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 28 Jul 2022 09:01
Last Modified: 28 Jul 2022 09:01
Publisher URL:
OA policy:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 9984 Statistics for this ePrint Item