A lifelong power source in miniature shape
The batteries that feed smartphones, electric vehicles and drones often require frequent charging and relegation over time, leading to limited lifespan and environmental problems. Now a team of Daegu Gyeongbuk Institute of Science and Technology (DGIST) is investigating a nuclear alternative that can offer for decades or even centuries of reliable power without recharging.
SU-IL in, a professor of Dgist, presented this breakthrough during the Spring 2025 meeting of the American Chemical Society, held from March 23-27. His team is groundbreaking nuclear batteries that use a radio cabbage fabric base, a form of radioactive carbon that is known for broadcasting beta particles, to produce safe and long-term energy.
“The performance of Li-ion batteries are almost saturated,” explains. This limitation, combined with the environmental extraction and removal environment, is interested in sustainable, high -quality alternatives. Nuclear batteries, which convert radiation into electrical power, occur as a compelling solution.
Radio cabbage, or carbon-14, is a beta-emitter with little energy that can be effectively protected with a thin aluminum layer, making it a practical choice for safe nuclear batteries. In addition, radio cabbage fabric as a by -product of nuclear reactors is affordable, wide accessible and recyclable. The extremely slow decay percentage suggests that batteries that can take thousands of years by the driven thousands of years.
In a Betavoltaic cell, beta particles of radioactive decay hit a semiconductor, which generate electricity. In and his team developed a prototype with the help of titanium dioxide as the semiconductor base, improved with a ruthenium -based dye. They further improved the performance by the treatment of citric acid, which strengthened the adhesion of the dye to the titanium dioxide.
This set -up creates a cascade of electron transfer, known as an electrical trap surcharge, caused by the interaction of beta rays with the dye. The semiconductor efficiently captures the resulting load and canalize it via an external circuit to produce usable electricity.
In contrast to earlier models with radio cabbage fabric only on the cathode, the new design includes radio cabbage in both the cathode and the anode. This double configuration increases the number of generated beta particles and minimizes energy loss caused by the spatial separation of the components.
During testing, the improved prototype showed a significant jump in the efficiency of energy conversion, which increases from 0.48% to 2.86%. This performance jump is attributed to the improved interaction between the radioactive material and the colorant -sensitive semiconductor.
Such nuclear batteries can cause a revolution in countless technologies, in known. Medical implants such as pacemakers can function for a lifetime without replacement operations. Nevertheless, the current prototype only converts a small part of the radioactive decay into electrical power, behind the output of conventional lithium ion systems.
To close this performance gap, future development will focus on refining the geometry of beta source and improving the absorbent properties of the semiconductor material. These improvements can unlock higher power yields and broaden the reach of applications.
As the public attitude towards nuclear technology evolves in the midst of climate problems, emphasized in the potential of small -scale, safe nuclear energy: “We can place safe nuclear energy in devices that are the size of a finger.”
Research report:The next generation battery: very efficient and stable C14-color-sensitive Betavoltaic cell
