Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7728040 | Journal of Power Sources | 2016 | 5 Pages |
Abstract
An H2Fe3+ recombination method is being developed for all-iron flow batteries. Working principles are described and a proof-of-concept in-tank reactor is demonstrated. A membrane-less galvanic reactor is characterized using potential, polarization and impedance measurements at hydrogen partial pressures ranging from 0.3 to 11.3 psig. Through a vertical reactor geometry, hydrogen recombination rates of up to 60 mA cmâ2 were measured at PH2 = 4.5 psig for a reactor with a platinum loading of 3.2 mg cmâ2, based on the geometric catalyzed area. This is equivalent to over 375 mA cmâ2 with respect to the cross sectional area of the reactor at the waterline. This rate is sufficient that the reactor will readily fit inside the positive reservoir of a flow battery. The reactor was found to be resistant to degradation by flooding or catalyst loss.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
S. Selverston, R.F. Savinell, J.S. Wainright,