First-principles thermal modeling of electric double layer capacitors under constant-current cycling

This study aims to develop physical modeling and understanding of the coupled electrodiffusion, heat generation, and thermal transport occurring in electric double layer capacitors (EDLCs) during constant-current cycling. To do so, the governing energy equation was derived from first principles and...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2014, Vol.246, p.887-898
Main Authors: D'ENTREMONT, Anna, PILON, Laurent
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors. Resistors. Filters
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heat transfer
Theoretical studies. Data and constants. Metering
Transport and storage of energy
Various equipment and components
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:This study aims to develop physical modeling and understanding of the coupled electrodiffusion, heat generation, and thermal transport occurring in electric double layer capacitors (EDLCs) during constant-current cycling. To do so, the governing energy equation was derived from first principles and coupled with the modified Poisson-Nernst-Planck model for transient electrodiffusion in a binary and symmetric electrolyte. In particular, irreversible Joule heating and reversible heat generation rates due to ion diffusion, steric effects, and changes in entropy of mixing in EDLCs were rigorously formulated. Detailed numerical simulations of the temperature rise in the electrolyte were performed for planar electrodes. The results qualitatively reproduced experimental data reported in the literature under various charging/discharging conditions.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2013.08.024