Type V Vessel-Aided Electrochemical Compression for Ultra-High Pressure Electrolysis

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Exploratory Topics
Columbus, Ohio
Project Term:
08/30/2022 - 08/29/2024

Technology Description:

pH Matter will use electrochemical compression within an electrolysis stack and contained in a Type V vessel to eliminate or reduce the amount of additional mechanical compression required to make high-pressure hydrogen (200-700 bar). Historically, mechanical stability, hydrogen crossover, or diffusion problems made such an approach very challenging. In addition to the Type V vessel, pH Matter will utilize their patented, hybrid liquid alkaline-anion exchange membrane electrolysis cell that has 30x less crossover than a state-of-the-art proton exchange membrane electrolyzer. Current hydrogen compression, storing, and dispensing costs add $2.70/kg to the cost of heavy-duty hydrogen fuel, which must cost between $3-4/kg to be competitive with fossil fuels. If successful, this approach could reduce the cost of 700 bar hydrogen fuel by $0.50-2.00/kg.


ARPA-E Program Director:
Dr. Halle Cheeseman
Project Contact:
Dr. Travis Hery
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