A simple model for the vanadium redox battery

A two-dimensional stationary model, based on the universal conservation laws and coupled with electrochemical reactions, is applied to describe a single all-vanadium redox flow cell. Emphasis is placed on studying the effects of applied current density, electrode porosity and local mass transfer coe...

Full description

Saved in:
Bibliographic Details
Published in:Electrochimica acta 2009-11, Vol.54 (27), p.6827-6836
Main Authors: You, Dongjiang, Zhang, Huamin, Chen, Jian
Format: Article
Language:English
Subjects:
Applied current density
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrode porosity
Exact sciences and technology
Local mass transfer coefficient
Stationary model
Vanadium redox battery
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A two-dimensional stationary model, based on the universal conservation laws and coupled with electrochemical reactions, is applied to describe a single all-vanadium redox flow cell. Emphasis is placed on studying the effects of applied current density, electrode porosity and local mass transfer coefficient on the cell performance. The model results indicate that bulk reaction rate depends on the applied current density. The transfer current density and over-potential increase almost twice as the applied current density doubled. A decrease in electrode porosity leads to a more rapid depletion of the reactant concentration, a higher integral average value of the transfer current density and a more uniform distribution of the over-potential. The local mass transfer coefficient only affects the value of the over-potential.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2009.06.086