Graphite Felt Electrode Modified by Quaternary Ammonium for Vanadium Redox Flow Battery with an Ultra-Long Cycle Life

Xuejiao Liu; Junping Hu; Jun Liu; Hongyi Liu; Sha Fu; Xiongwei Wu; Yuping Wu

doi:10.3390/inorganics10110208

Inorganics (Nov 2022)

Graphite Felt Electrode Modified by Quaternary Ammonium for Vanadium Redox Flow Battery with an Ultra-Long Cycle Life

Xuejiao Liu,
Junping Hu,
Jun Liu,
Hongyi Liu,
Sha Fu,
Xiongwei Wu,
Yuping Wu

Affiliations

Xuejiao Liu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Junping Hu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Jun Liu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Hongyi Liu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Sha Fu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Xiongwei Wu: School of Chemistry and Materials Science, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
Yuping Wu: State Key Laboratory of Materials-Oriented Chemical Engineering, School of Energy Science and Engineering, Nanjing Tech University Nanjing, Nanjing 211816, China

DOI: https://doi.org/10.3390/inorganics10110208
Journal volume & issue: Vol. 10, no. 11
p. 208

Abstract

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Vanadium redox flow batteries (VRFBs) are one of the most attractive devices for grid-scale energy storage due to their advantages of high safety, flexible assembly, and electrolyte-class recycling. However, the conventional graphite felt electrodes usually possess inferior electrocatalytic activity for vanadium ion redox reactions, vastly limiting the rate and lifespans of VRFBs. Herein, we demonstrate a high-rate and ultra-stable vanadium redox flow battery based on quaternary ammonium salt-modified graphite felt electrodes. At a high current density of 200 mA cm−2, the constructed VRFB exhibited a superior cycling life of up to 1000 cycles. This work affords a straightforward approach for developing efficient, environmentally friendly, and low-cost graphite felt electrodes for ultra-stable and high-rate VRFBs.

Published in Inorganics

ISSN: 2304-6740 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Inorganic chemistry
Website: http://www.mdpi.com/journal/Inorganics

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