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Self-assembled heteropolyacid on nitrogen-enriched carbon nanofiber for vanadium flow batteries

Etesami, Mohammad and Abouzari-Lotf, Ebrahim and Sha'rani, Saidatul Sophia and Miyake, Mikio and Nia, Pooria Moozarm and Ripin, Adnan and Ahmad, Arshad (2018) Self-assembled heteropolyacid on nitrogen-enriched carbon nanofiber for vanadium flow batteries. Nanoscale, 10 (27). pp. 13212-13222. ISSN 2040-3364

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Official URL: http://dx.doi.org/10.1039/c8nr02450b

Abstract

A novel polyoxometalate-based electrode was developed by incorporating phosphotungstic acid (PWA) in nylon-6,6 nanofiber, followed by carbonization. The developed PWA-carbon nanofiber (PWA-CNF) showed the characteristics of the dual-scale porosity of micro- and mesoporous substrate with surface area of around 684 m2 g-1. The compound exhibited excellent stability in vanadium electrolyte and battery cycling. Evaluation of electrocatalytic properties toward V2+/V3+ and VO2+/VO2 + redox couples indicated promising advantages in electron transfer kinetics and increasing energy efficiency, particularly for the VO2+/VO2 + couple. Moreover, the developed electrode exhibited substantially improved energy efficiency (14% higher than that of pristine carbon felt) in the single cell vanadium redox flow battery. This outstanding performance was attributed to high surface area and abundant oxygen-containing linkages in the developed electrode.

Item Type:Article
Uncontrolled Keywords:electrocatalytic properties, electron transfer kinetics, heteropoly acids, high surface area
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:85911
Deposited By: Yanti Mohd Shah
Deposited On:30 Jul 2020 15:39
Last Modified:30 Jul 2020 15:39

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