Electrochemistry | H supply DC power output Pressure control valve H Fuel gas
Vacuum pump
Bipolar plate with flow field
Humidifier
Excess H
Gas diffusion layer Proton
Chiral electron spin control nano-coating
Platinium anode catalyst Radiator
Cooling water pump
exchange membrane
Chiral electron spin control nano-coating
Legend Platinium cathode catalyst Fan PEM fuel cell with chiral coated electrodes
that pass through it. Nature uses one-sided chiral molecules so that all the electrons pass with the same aligned spin.”
When a chiral molecule is applied to an electrode, the spin of the electrons flowing through the electrode is systematically aligned, and they flow smoothly with less friction. The result is less wasted energy and a more efficient flow of electrons.
“Our chirality-inducing coating works as a filter to other processes as the electrons flow through our coating into the next process stage. It’s a bit like a polaroid filter in your sunglasses”, suggests Marom.
“Through our deep understanding of how the CISS effect works, we will be able to apply it to many electrical and electrochemical processes that will be central to achieving energy efficiency. It is a foundation technology which will improve many types of equipment and will help pave the way to net-zero.”
Bringing nature’s lessons to modern power systems The founders of Chiral Energy have extensively researched how nature uses chirality to its advantage. And, they have used their insights to improve electrochemical processes which are being industrialised today. Lithium ion and vanadium flow battery technologies can both benefit from a more orderly flow of electrons. Electrolysers for green hydrogen production also benefit from electron spin alignment. Less electrical power is required to produce each
kg of hydrogen, reducing the LCoH. Chlor-alkali electrolysers could similarly benefit from chiral electron spin alignment to reduce their power consumption when producing chlorine gas. Chiral’s breakthrough is equally relevant to improving the efficiency of fuel cells, whether they are fed with natural gas or hydrogen. With electron spin alignment, they can generate more power, and less heat. In these applications, it is also the electrodes which are treated with the chiral electron spin alignment nano-coating. Chiral Energy has developed a nano-structure that is coated as an additional layer on top of the conventional electrode. As such, it works in synergy with existing technologies. “As the electrons flow through our nano-coating, their spin orientation is aligned by the chiral molecules in this layer resulting in a more orderly flow and better system efficiency”, explains Marom.
Robust and versatile
Because the Chiral Energy spin-selective nano coating is synergistic with other catalysts, it can be equally relevant to PEM, pressurised alkaline and low-pressure advanced alkaline electrolyser stacks.
“We’re currently engaged in proof of concept studies with companies across several mainstream electrolyser technologies” says Marom. “Our solution is a broadly applicable technology which enhances electrolysis performance across the board.”
The Chiral Energy coating is robust and can be applied onto existing electrolyser electrodes.
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It can operate comfortably at a wide range of temperatures, from the lower end of the range at 60 °C for PEM systems to the upper end of the range at 90°C for alkaline electrolysers. It is also unaffected by the highly alkaline electrolyte in alkaline electrolyser stacks. Furthermore, it can support current densities that are commercially relevant to all systems, including the higher current densities observed in advanced alkaline electrolysers and the most modern PEM electrolysers.
PEM, AEM and many alkaline electrolysers operate in the range of 15 to 35 bar. “Our electron spin filtration nano-coating can support all these environments”, declares Marom.
Integration with LIB production lines
As with electrolyser electrodes, Chiral Energy’s CISS inducing coating can be applied directly onto existing LIB electrodes. Its adhesion is excellent, which enables the coating to be applied with minimal modifications to existing high- throughput battery production lines. The nano-layer coating is also extremely thin, meaning changes to existing components can be avoided and there are no significant changes to the dimensions of the end product. “We look forward to extending our scope of deployment into utility-scale BESS”, says Maron. “It would be ideal to partner with some players involved in lithium-ion battery production to demonstrate the efficacy of our CISS inducing nano coating in this space”.
Hydrogen Oxygen Water H+
ion
Bipolar plate with flow field
Cooling Jacket
Air containing O
Blower
Humidifier & Heat recovery
Air
H
and oxygen- depleted air
Gas diffusion layer
Vent
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