Korean researchers are developing a micro-nuclear battery powered by radioactive carbon, which generates electricity through beta radiation-induced electron avalanche. This innovative technology is designed to be both environmentally friendly and long-lasting.
Lithium-ion cabatteries face challenges such as short lifespan, performance degradation, and environmental impact. To address these issues, a research team at the Daegu Gyeongbuk Institute of Science and Technology (DGIST) in South Korea has developed a radioactive carbon nuclear battery. Radioactive carbon, a byproduct of nuclear power plants, is low-cost and safe, with its beta radiation effectively shielded by aluminum foil. Moreover, due to its slow decay rate, it has an exceptionally long theoretical lifespan of several thousand years.
To significantly enhance the energy conversion efficiency of this new design, the researchers incorporated a titanium dioxide (TiO₂)-based semiconductor—commonly used in solar cells—combined with a ruthenium-based dye. They further strengthened their integration through citric acid treatment. When beta radiation from radioactive carbon interacts with the treated dye, it triggers an electron transfer chain reaction known as an electron avalanche. This avalanche effect propagates through the dye, while the TiO₂ layer efficiently collects the generated electrons.
Additionally, the new battery design incorporates radioactive carbon into both the dye-sensitized anode and cathode. By applying dual-electrode radiation treatment, the researchers increased beta radiation generation and minimized energy loss between electrodes. Prototype testing demonstrated a significant improvement in energy conversion efficiency—from 0.48% to 2.86%.
Although the current efficiency remains lower than that of lithium-ion batteries, further optimization of the beta radiation emitters and absorber materials could lead to substantial performance improvements in the future.
Korean Scientists Develop Radioactive Carbon Micro-Nuclear Battery with Enhanced Efficiency
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