Limitless Power from Nuclear Fusion May Be Closer Than Ever
Illustration of a nuclear fusion reactor
Science Photo Library / Alamy
Researchers have accidentally discovered a new process that could revolutionize the supply of the vital isotope lithium-6, crucial for fueling sustainable fusion reactors and potentially unlocking limitless power.
The fusion process that involves combining deuterium and tritium isotopes of hydrogen to produce energy is relatively straightforward. However, tritium, a rare and expensive isotope, is challenging to source. “Breeder” reactors aim to generate tritium by bombarding lithium with neutrons.
While lithium-7 is abundant in nature, lithium-6 is scarce but reacts more efficiently with neutrons to produce tritium in fusion reactions. The difficulty lies in separating the two isotopes, a process traditionally done using a toxic method involving mercury, which has not been employed in Western countries for decades.
However, a team led by Sarbajit Banerjee at ETH Zurich stumbled upon a new method while working on water purification for oil drilling. They found that a compound called zeta vanadium oxide, present in their cement membranes, could selectively isolate lithium-6, a breakthrough that could revolutionize the production of this critical isotope.
According to Banerjee, zeta vanadium oxide’s structure allows it to capture lithium-6 ions more effectively, potentially offering a more efficient and environmentally friendly way to produce the isotope on a larger scale. While the team has only isolated a small amount of lithium-6 so far, they are optimistic about scaling up the process to meet the demands of future fusion reactors.
Although challenges remain in scaling up the production of lithium-6, the potential benefits for the fusion energy industry are significant. With this new discovery, the dream of harnessing limitless power from nuclear fusion may be closer to reality than ever before.
