Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M45: Energy - Catalysis
8:00 AM–10:24 AM,
Wednesday, March 8, 2023
Room: Room 315
Sponsoring
Unit:
GERA
Chair: Liang An, The Hong Kong Polytechnic University
Abstract: M45.00012 : Material Design Considerations for Bipolar Membranes in Energy Conversion*
10:12 AM–10:24 AM
Presenter:
Justin Bui
(UC Berkeley)
Authors:
Justin Bui
(UC Berkeley)
Adam Z Weber
(Lawrence Berkeley National Laboratory)
Alexis T Bell
(University of California, Berkeley)
In this talk, we will discuss our recent continuum modeling efforts to understand structure-property-performance relationships in BPMs. We demonstrate that the BPM polarization curve can be broken down into three regimes: a low-current-density regime dominated by salt-ion leakage, an intermediary-current-density regime dominated by the kinetics of WD, and a high-current-density regime controlled by water transport. Modeling reveals that ionomer properties dictate ion leakage and the water limited current density. Meanwhile, the surface properties of the WD catalyst dictate the behavior in the water dissociation regime. The work establishes guidelines for the design of BPMs, setting the stage for BPMs in a wide array of energy technologies.
*This material is based on work performed by the Liquid Sunlight Alliance, which is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub under Award Number DE-SC0021266.
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