Next Article in Journal
Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration
Previous Article in Journal
Hybrid Carbon-Based Clathrates for Energy Storage
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessFeature PaperArticle
C 2018, 4(1), 8; doi:10.3390/c4010008

High-Performance Vanadium Redox Flow Batteries with Graphite Felt Electrodes

Department of Natural Sciences, University of Chester, Thornton Science Park, Pool Lane, Ince, Chester CH2 4NU, UK
*
Author to whom correspondence should be addressed.
Received: 11 December 2017 / Revised: 16 January 2018 / Accepted: 18 January 2018 / Published: 25 January 2018
View Full-Text   |   Download PDF [7658 KB, uploaded 25 January 2018]   |  

Abstract

A key objective in the development of vanadium redox flow batteries (VRFBs) is the improvement of cell power density. At present, most commercially available VRFBs use graphite felt electrodes under relatively low compression. This results in a large cell ohmic resistance and limits the maximum power density. To date, the best performing VRFBs have used carbon paper electrodes, with high active area compression pressures, similar to that used in fuel cells. This article investigates the use of felt electrodes at similar compression pressures. Single cells are assembled using compression pressures of 0.2–7.5 bar and tested in a VRFB system. The highest cell compression pressure, combined with a thin Nafion membrane, achieved a peak power density of 669 mW cm−2 at a flow rate of 3.2 mL min−1 per cm2 of active area, more than double the previous best performance from a felt-VRFB. The results suggest that felt electrodes can compete with paper electrodes in terms of performance when under similar compression pressures, which should help guide electrode development and cell optimization in this important energy storage technology. View Full-Text
Keywords: vanadium redox flow battery; graphite felt; flow battery power density; cell ohmic resistance; electrode compression vanadium redox flow battery; graphite felt; flow battery power density; cell ohmic resistance; electrode compression
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Davies, T.J.; Tummino, J.J. High-Performance Vanadium Redox Flow Batteries with Graphite Felt Electrodes. C 2018, 4, 8.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
C EISSN 2311-5629 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top