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- Title
Pressure drop through platinized titanium porous electrodes for cerium‐based redox flow batteries.
- Authors
Arenas, Luis F.; Ponce de León, Carlos; Walsh, Frank C.
- Abstract
The pressure drop, Δ P, across a redox flow battery is linked to pumping costs and energy efficiency, making fluid properties of the electrolyte important in scale‐up operations. The Δ P at diverse platinized titanium electrodes in Ce‐based redox flow batteries is reported as a function of mean linear electrolyte velocity measured in a rectangular channel flow cell. Darcy's friction factor and permeability vs. Reynolds number are calculated. Average permeability values are: 7.10 × 10−4 cm2 for Pt/Ti mesh, 4.45 × 10−4 cm2 for Pt/Ti plate + turbulence promoters, 1.67 × 10−5 cm2 for Pt/Ti micromesh, and 1.31 × 10−6 cm2 for Pt/Ti felt. The electrochemical volumetric mass transport coefficient, k m A e, is provided as a function of Δ P. In the flow‐by configuration, Pt/Ti felt combines high k m A e values with a relatively high Δ P, followed by Pt/Ti micromesh. Pt/Ti mesh and Pt/Ti plate gave a lower Δ P but poorer electrochemical performance. Implications for cell design are discussed. © 2017 American Institute of Chemical Engineers <italic>AIChE J</italic>, 64: 1135–1146, 2018
- Subjects
CERIUM; ELECTROCHEMICAL analysis; POROUS electrodes; TITANIUM; PRESSURE drop (Fluid dynamics)
- Publication
AIChE Journal, 2018, Vol 64, Issue 3, p1135
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.16000