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Issue 27, 2018
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Self-assembled heteropolyacid on nitrogen-enriched carbon nanofiber for vanadium flow batteries

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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.

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

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Article information


Submitted
25 Mar 2018
Accepted
20 Jun 2018
First published
20 Jun 2018

Nanoscale, 2018,10, 13212-13222
Article type
Paper

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

M. Etesami, E. Abouzari-Lotf, S. S. Sha'rani, M. Miyake, P. Moozarm Nia, A. Ripin and A. Ahmad, Nanoscale, 2018, 10, 13212
DOI: 10.1039/C8NR02450B

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