Abstract
The mass transfer behaviors in porous electrodes are the main barriers for organic redox flow battery performance except optimizing microscopic modification of active materials. In this study, a three-dimensional numerical model is established based on electrochemistry dynamics and hydromechanics, which is verified by lots of experiments. Due to Reynolds number and hydromechanics influenced by channel section shapes, the mass transfer behaviors and battery performance are influenced by the channel section shapes. The results show that the semicircular channel section needs the lowest charging voltage and discharges the highest voltage. The average concentration of 2,6-reDHAQ ions in semicircle flow channel is up to 19.1% higher than that of triangular flow channel and 11.7% higher than that of the common rectangular flow channel. During discharge, uniformity factors of semicircular design is 16.2% higher than that of triangular flow channel and 11.3% higher than that of rectangular flow channel. What's more, the semicircular design presents the best performance in the power-based efficiency, input and output work under different flow rates and initial concentrations. It is concluded that semicircular is the best design of channel section shapes, which can provide a new way to investigate mass transfer behavior in organic redox flow battery.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
