A team of researchers in the United Kingdom has engineered a groundbreaking battery that harnesses carbon-14 isotopes extracted from decommissioned graphite blocks used in nuclear reactors. This innovative device is capable of generating electricity continuously for thousands of years.
The technology operates on the principle of beta-voltaics, which converts energy released from the natural decay of radioactive materials into electrical power.
To create these batteries, scientists utilized radioactive graphite blocks that accumulate at shut-down nuclear power plants. When these blocks are heated, the radioactive carbon-14 concentrated on their surface is released as gas.
This gas is then collected and transformed into synthetic diamonds under high temperatures and pressure. This dual-purpose approach not only significantly reduces the radioactivity of the graphite blocks, making their storage more cost-effective, but also provides a sustainable source for long-lasting energy solutions.
Since the diamonds produced contain carbon-14, they remain radioactive and emit beta particles (electrons).
The electricity generation process occurs as follows:
- Electrons emitted during decay collide with a semiconductor structure within the diamond matrix.
- This interaction creates free charge carriers, resulting in a continuous electric current.
To ensure safety, the radioactive crystal is encased within a second layer of non-radioactive synthetic diamond. This outer shell fully absorbs the internal radiation while also functioning as an additional semiconductor, boosting the system’s efficiency to nearly 100%.
With a half-life of 5,730 years, the device can operate without recharging or replacement for longer than most human civilizations have existed.
Despite the use of radioactive material, the battery is completely safe for human use. Researchers have noted that the radiation level on the surface of such a power source is lower than the natural background radiation of a typical banana.
Due to their relatively low current density, these batteries are not suitable for powering smartphones or electric vehicles. However, they present an invaluable alternative to lithium-ion batteries in applications requiring long-term autonomy with minimal energy consumption in extreme conditions.
Scientists believe this technology will find applications in spacecraft, deep-sea research stations, pacemakers, and sensors in hard-to-reach areas, where maintenance is critically challenging or hazardous.
Researchers in the UK have developed a diamond battery that utilizes carbon-14 from nuclear waste, capable of generating power for thousands of years. This innovation promises safe, long-lasting energy solutions for specialized applications.