Researchers discover capillary-fed electrolysis cell can ship hydrogen at 98% cell vitality effectivity

Researchers discover capillary-fed electrolysis cell can ship hydrogen at 98% cell vitality effectivity


In an open entry paper printed in Nature Communications, researchers from the College of Wollongong in Australia report that their capillary-fed electrolysis cell demonstrates water electrolysis efficiency exceeding business electrolysis cells, with a cell voltage at 0.5 A cm−2 and 85 °C of only one.51 V, equating to 98% vitality effectivity, with an vitality consumption of 40.4 kWh/kg hydrogen (vs. ~47.5 kWh/kg in business electrolysis cells).

With this stage of cell vitality effectivity—effectively above Worldwide Renewable Vitality Company’s (IRENA) 2050 goal and considerably higher than current electrolyzer applied sciences—hydrogen manufacturing value could possibly be effectively under US$1.50/kg.

This strategy to water electrolysis provides water to the hydrogen- and oxygen-evolving electordes through capillary-induced transport alone a porous inner-electrode separator. This results in inherently bubble-free operation on the electrodes.

Impressed by the historic evolution of water electrolysis cell architectures culminating within the direct manufacturing of one of many gases, the Capillary-Fed Electrolysis cell straight produces each gases. Liquid electrolyte is repeatedly drawn up the separator by a capillary impact, from a reservoir on the backside of the cell. The porous, hydrophilic separator sustains the move fee required for water electrolysis. Hodges et al.

The expertise, invented by scientists on the College of Wollongong, is now being commercialized by Hysata, with backing from IP Group and the Clear Vitality Finance Company (CEFC).

Paul Barrett, CEO of Hysata, stated the corporate is on a transparent pathway to commercialise the world’s best electrolyser and attain gigawatt scale hydrogen manufacturing capability by 2025.

Gerry Swiegers, Chief Expertise Officer at Hysata, says stated the general design of the Hysata electrolyser system is less complicated than current applied sciences.

Electrolyzers have been round for 200 years, nevertheless the big quantities of renewable electrical energy required to provide inexperienced hydrogen and the general value of electrolysers immediately has prevented large-scale uptake of inexperienced hydrogen.

Hysata’s general electrolyser system has been designed for ease of producing, scaling and set up, delivering 95 % general system effectivity, equal to 41.5 kWh/kg, in comparison with 75 % or much less for current electrolyser applied sciences. For hydrogen producers, this may considerably scale back each the capital and operational prices to provide inexperienced hydrogen.

—Gerry Swiegers


  • Hodges, A., Hoang, A.L., Tsekouras, G. et al. (20220 “A high-performance capillary-fed electrolysis cell guarantees extra cost-competitive renewable hydrogen.” Nat Commun 13, 1304 doi: 10.1038/s41467-022-28953-x


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December 2022