Imperial College London

Professor Nigel Brandon OBE FREng

Faculty of Engineering

Dean of the Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 8600n.brandon Website

 
 
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Location

 

2.06Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Munoz:2017:10.1149/2.1431714jes,
author = {Munoz, CAP and Dewage, HH and Yufit, V and Brandon, NP},
doi = {10.1149/2.1431714jes},
journal = {Journal of The Electrochemical Society},
pages = {F1717--F1732},
title = {A unit cell model of a regenerative hydrogen-vanadium fuel cell},
url = {http://dx.doi.org/10.1149/2.1431714jes},
volume = {164},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - In this study, a time dependent model for a regenerative hydrogen-vanadium fuel cell is introduced. This lumped isothermal model is based on mass conservation and electrochemical kinetics, and it simulates the cell working potential considering the major ohmic resistances, a complete Butler–Volmer kinetics for the cathode overpotential and a Tafel–Volmer kinetics near mass-transport free conditions for the anode overpotential. Comparison of model simulations against experimental data was performed by using a 25 cm2 lab scale prototype operated in galvanostatic mode at different current density values (50−600Am−2). A complete Nernst equation derived from thermodynamic principles was fitted to open circuit potential data, enabling a global activity coefficient to be estimated. The model prediction of the cell potential of one single charge-discharge cycle at a current density of 400Am−2 was used to calibrate the model and a model validation was carried out against six additional data sets, which showed a reasonably good agreement between the model simulation of the cell potential and the experimental data with a Root Mean Square Error (RMSE) in the range of 0.3–6.1% and 1.3–8.8% for charge and discharge, respectively. The results for the evolution of species concentrations in the cathode and anode are presented for one data set. The proposed model permits study of the key factors that limit the performance of the system and is capable of converging to a meaningful solution relatively fast (s–min).
AU - Munoz,CAP
AU - Dewage,HH
AU - Yufit,V
AU - Brandon,NP
DO - 10.1149/2.1431714jes
EP - 1732
PY - 2017///
SN - 1945-7111
SP - 1717
TI - A unit cell model of a regenerative hydrogen-vanadium fuel cell
T2 - Journal of The Electrochemical Society
UR - http://dx.doi.org/10.1149/2.1431714jes
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000419187700135&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/57302
VL - 164
ER -