A research team at The Ohio State University has demonstrated a small battery that generates electricity from the gamma radiation given off by nuclear waste, rather than from any chemical stored inside the cell itself. The prototype is a proof of concept aimed at a specific problem: how to harvest useful power from the intense radiation that surrounds spent nuclear fuel, energy that today is simply shielded against and discarded.
The device does not consume the waste or make it disappear, and it is not meant to charge a phone. It is designed for the narrow set of places where radiation is abundant and constant, such as storage pools and reactor systems, and where even a trickle of harvested electricity could run a sensor that would otherwise need its own power line.
How the scintillator-and-solar-cell design works
The battery pairs two components that are individually familiar. The first is a scintillator crystal, a material that glows when it absorbs radiation. The second is a solar cell, which converts light into electricity. When gamma rays from nearby radioactive material strike the scintillator, the crystal emits visible light, and the attached photovoltaic cell turns that light into an electric current. In effect, the design converts invisible, penetrating radiation into a form of light that ordinary solar technology can capture, an approach detailed by Ohio State University.
That two-step conversion is what lets the cell tap gamma radiation, which is far more penetrating than the beta particles used in smaller radioisotope batteries. Gamma rays pass through most materials, so capturing their energy requires a medium that first absorbs them and re-emits something a semiconductor can use.
What the prototype measured in the lab
The tested device was tiny, on the order of four cubic centimeters, and it was placed near two radioactive isotopes that are common byproducts of spent nuclear fuel: cesium-137 and cobalt-60. When exposed to cesium-137, the cell produced roughly 288 nanowatts. Next to the more intensely radioactive cobalt-60, output rose to about 1.5 microwatts, enough to power a small sensor. The results were also summarized by Physics World.
Those figures are minuscule compared with a household battery, but the point of the experiment was to show that the concept produces measurable, usable electricity and that output scales with the strength of the radiation source. A stronger field yields more light in the scintillator and more current from the solar cell.
Why the battery itself is not radioactive
One of the more important design features is that the cell contains no radioactive material of its own. It is powered entirely by an external radiation source, so the battery can be handled safely once removed from that field. That distinction matters for how such a device might be deployed: it is intended to sit within an already-radioactive environment, not to be carried around or installed in a home.
The gamma radiation the cell relies on is far more penetrating than a medical X-ray, which is exactly why it is otherwise treated purely as a hazard to be shielded. Turning a fraction of that energy into electricity reframes a waste stream as a potential, if limited, power source.
Where a radiation-harvesting cell could be used
The researchers have been explicit that the technology is not intended for public or consumer use. The realistic settings are industrial and scientific: spent-fuel storage pools, reactor monitoring systems, and instruments for deep-sea or space exploration, where radiation is present and long-lived power is valuable. In such places, a maintenance-free cell that runs on ambient radiation could power sensors and control nodes that would otherwise be hard to service.
Scaling remains the open question. A four-cubic-centimeter prototype delivering microwatts is a long way from any system that could offset a meaningful share of a facility’s power needs, and the team has framed the work as a demonstration that optimized designs are worth pursuing rather than a finished product.
What the result does and does not claim
It is worth separating the genuine finding from the more sweeping impressions the phrase “battery that runs on nuclear waste” can create. The device recovers a small amount of energy that currently goes unused around radioactive material; it does not reduce the volume of waste, neutralize its hazard, or shorten how long it must be stored. What the experiment establishes is narrower and still notable: that a robust, non-radioactive cell can convert ambient gamma radiation into a steady, if tiny, electrical output, opening a path toward harvesting power in environments where nothing else can easily go.
Where the concept fits among nuclear power sources
The Ohio State device belongs to a broader family of technologies that draw electricity from radioactive decay rather than from a chain reaction. Radioisotope thermoelectric generators, the units that have powered deep-space probes for decades, convert the heat of decay into current and carry their own fuel aboard. Smaller betavoltaic cells tap the electrons emitted by isotopes such as nickel-63. The scintillator-and-solar-cell approach adds a third option aimed specifically at gamma radiation, the most penetrating and hardest to harness. None of these will replace a power plant, and all of them deliver modest output. What distinguishes the gamma-harvesting design is that it draws on an external field, positioning it as a way to reclaim energy from waste that facilities already manage and shield.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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