Journal
NANOTECHNOLOGY
Volume 27, Issue 17, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/17/174002
Keywords
CAD; 3D printing; metal-air battery; oxygen reduction; oxygen evolution; water oxidation; gas-diffusion electrode
Funding
- US Office of Naval Research
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The ability to effectively screen and validate gas-diffusion electrodes is critical to the development of next-generation metal-air batteries and regenerative fuel cells. The limiting electrode in a classic two-terminal device such as a battery or fuel cell is difficult to discern without an internal reference electrode, but the flooded electrolyte characteristic of three-electrode electroanalytical cells negates the prime function of an air electrode-a void volume freely accessible to gases. The nanostructured catalysts that drive the energy-conversion reactions (e.g., oxygen reduction and evolution in the air electrode of metal-air batteries) are best evaluated in the electrode structure as-used in the practical device. We have designed, 3D-printed, and characterized an air-breathing, thermodynamically referenced electroanalytical cell that allows us to mimic the Janus arrangement of the gas-diffusion electrode in a metal-air cell: one face freely exposed to gases, the other wetted by electrolyte.
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