YouTube has for several months kept suggesting videos on “nuclear diamond batteries.” Most of the videos I’ve glanced at looked like clickbaity rubbish about fraudulent pseudoscience… and ever now and then I briefly watch one of the videos, and they kinda don’t disappoint.
The Nuclear Diamond Battery itself seems a reasonable enough idea. Small quantities of some radioactive substance such as Carbon 14 or Nickel 63 are formed into thin films and sandwiched between thin films of diamond semiconductors. The radioactive element emits beta radiation – high energy electrons. The electrons are captured and converted to electricity by something akin to a photoelectic cell. The radiation is captured and prevented from escaping, and in the process converted to electricity… sounds like a winner, right? And apparently prototypes have been built that work. And thus we get videos like this:
The video promises batteries that are safe and last for thousands of years. And while this seems to be true, there is one problem that these sort of videos tend to not mention. From the Wikipedia article on the subject:
In 2018, researchers from the Moscow Institute of Physics and Technology (MIPT), the Technological Institute for Superhard and Novel Carbon Materials (TISNCM), and the National University of Science and Technology (MISIS) announced a prototype using 2-micron thick layers of 63Ni foil sandwiched between 200 10-micron diamond converters. It produced a power output of about 1 μW at for power density of 10 μW/cm3.
That’s ten *micro* Watts per cubic centimeter. A battery one meter on a side (which, using the density of diamond of 3.5 g/cm3, would mass 3,500 kilograms) would produce a power output of… ten Watts. Granted, it would do so for thousands of years but… ten fricken Watts. The Tesla Model S has a total motor output of 615,000 Watts. Such a car would require a Nuclear Diamond Battery with a volume of 61,500 cubic meters, massing somewhere in the vicinity of two hundred thousand *tons.* The Seawise Giant, the largest supertanker in history, could carry two of these batteries.
Ummm.
Next.