Relieving the grid of excess renewable electricity can be accomplished by powering a water electrolyzer to produce renewable hydrogen. This hydrogen can be temporarily stored and then used in filling stations, multiple industrial applications, or converted back to electricity when shortages occur. It can also be injected into the natural gas grid either directly or after methanation as synthetic natural gas. Solid oxide electrolysis cells (SOEC) offer the highest overall efficiency among other water splitting technologies to produce hydrogen, because the high operating temperature of SOEC significantly reduces the amount of required electrical energy.<br/><br/>A research and development program is under way at the Pacific Northwest National Laboratory to evaluate efficient hydrogen production via high-temperature steam electrolysis in SOECs. This presentation will provide an overview of the latest electrochemical testing and characterization results obtained using single SOECs, long term component durability assessment as well as the progress on manufacturing of 5kW SOEC stacks. 2D and 3D stack model is being constructed to predict expected thermal and electrical performance of SOEC stack.

High-temperature steam electrolysis for renewable hydrogen production

2019 Fall National Meeting

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