Study of Loss Mechanisms Using Half-Cell Measurements in a Regenerative Hydrogen Vanadium Fuel Cell
File(s)
Published version
Accepted version
Author(s)
Dewage, HH
Yufit, V
Brandon, NP
Type
Journal Article
Abstract
The positioning of reference electrodes in redox flow batteries without disturbing the cell operation represents a great challenge. However decoupling anode and cathode processes is crucial in order to fully understand the losses in the system so it can be further optimized. The feasibility of a regenerative fuel cell based on an V(IV)/V(V) electrolyte and hydrogen gas has previously been demonstrated. In this investigation, using electrochemical impedance spectroscopy, the various losses of the cathode, anode and whole cell were established using an alternative reference electrode set-up. The findings showed that the largest irreversible losses under the conditions tested arose from diffusion limitations in the cathode and the effect of vanadium crossover and therefore adsorption onto the platinum layer of the hydrogen electrode leading to higher losses on the anode. These results highlight the potential for further improvement and optimization of cell design and materials for both electrodes in the Regenerative Hydrogen Vanadium Fuel Cell.
Date Issued
2015-12-01
Date Acceptance
2015-10-29
Citation
Journal of the Electrochemical Society, 2015, 163 (1), pp.A5236-A5243
ISSN
0013-4651
Publisher
Electrochemical Society
Start Page
A5236
End Page
A5243
Journal / Book Title
Journal of the Electrochemical Society
Volume
163
Issue
1
Copyright Statement
© The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons
Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any
medium, provided the original work is properly cited.
Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any
medium, provided the original work is properly cited.
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/K002252/1
EP/L014289/1
Subjects
Science & Technology
Physical Sciences
Technology
Electrochemistry
Materials Science, Coatings & Films
Materials Science
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY
REDOX FLOW BATTERIES
ENERGY-STORAGE APPLICATIONS
REFERENCE ELECTRODE
Publication Status
Published
Date Publish Online
2015-12-01