New electrolysis cells make hydrogen production cheaper, more sustainable

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Achemical process that utilizes electrical energy to drive a non-spontaneous chemical reaction called electrolysis has been closely studied recently to advance sustainable energy solutions.

Now, scientists at the Technical University of Denmark (DTU) have undertaken a study to fabricate and test a new type of ceramic electrolysis cells with nickel-gadolinium-doped ceria (Ni-GDC) fuel electrodes.



This is in an ambition to convert green electricity from wind turbines and solar cells into sustainable fuels like hydrogen, methanol, and ammonia.
Affordable, sustainable electrolysis enable green fuel production

The team of researchers has discovered a new affordable and more sustainable long-lasting approach to enable the production of carbon-negative fuels such as hydrogen, methanol, and ammonia when met with the limitations of renewable sources.

The research demonstrated that the Ni-GDC fuel electrodes maintain their performance even after 1,000 hours of testing, showing only slight degradation under high current draws.

Researchers say that the new ceramic electrodes based on Ni-GDC fuel that the electrodes maintained their performance instead of wearing out.

According to Henrik Lund Frandsen, Professor at DTU, estimations denoted that the increased lifetime of Ni-GDC electrolysis cells can lead to significant savings in material consumption in future power-to-x plants and reduce the price of green hydrogen by up to five percent.

The increased lifespan of the chemical composition implies its longer lifespan which helps retain the performance in the long run, reducing the frequency of replacements and repairs, leading to lower material and maintenance costs.

“If we can get ceramic electrolysis cells into power-to-x technology in enough places around the world, their efficiency means that you can save 25 percent of all the electricity needed to produce the same amount of green fuel and save up to about 20 percent of the price of hydrogen,” stated Frandsen.

“And if we also improve the lifespan of the technology, it will result in material savings, which will mean a further price reduction of five percent.”
To boost sustainable transportation and industry

The production and scale-up of the electrolysis cells to manufacture sustainable fuels will take place at a large-scale factory currently under construction by Topsoe in Herning, Denmark.

The research sought to improve the efficiency and lifespan of electrolysis cells used in the production of green fuels.

This advancement comes at a time when the globe is trying to achieve net-zero goals and reduce carbon dioxide emissions The new technology could help promote sustainable transportation and industry.

By increasing the lifespan of the cells and maintaining their performance, significant savings in material consumption and production costs can be achieved. This, in turn, can reduce the price of green hydrogen and other fuels, making sustainable energy solutions more economically viable.

The results showed minimal degradation of the electrodes, even under high current draws, due to the nickel in the electrode not moving. Scientists have noted that this stability is a considerable improvement over conventional ceramic electrolysis cells.

The cells were fabricated by gluing different ceramic layers together, cutting them into squares, and firing them at 1,250 degrees Celsius in a furnace.

Despite some challenges with new materials causing problems in the electrolyte, the overall results indicate a positive and scalable path forward for manufacturing efficient and long-lasting electrolysis cells.



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