Licube targets lithium-6 supply for future fusion reactors

Fusion reactors generate energy by splitting atoms, but they require a steady supply of tritium to function. Because tritium is rare in nature, designers intend to produce it onsite by bombarding lithium-6 blankets with neutrons. Natural lithium contains only 7.5% of the isotope, creating a significant bottleneck for the nascent industry. Licube, which is showcasing its technology at TechCrunch Disrupt in San Francisco, utilizes a specialized electrolyzer that drives lithium-6 across a ceramic membrane faster than its heavier counterpart. CEO Yohei Kiguchi aims to achieve 99.995% enrichment, turning a rare material into a scalable fuel source. While fusion remains years from commercial reality, the startup plans to bridge the gap by supplying enriched lithium to the semiconductor and pharmaceutical sectors. Kiguchi, a former executive at Japanese energy firm Enechange, pivoted to the venture after witnessing the scale of the ITER project in France. He views the potential fusion market as a $50 billion opportunity by 2040, positioning his company as the essential fuel provider for the energy transition.