Black holes helped solve the battery problem. Free Technical Library News

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Black holes helped solve the problem of batteries

06.07.2012

In the laboratory of the Leibniz Institute for Astrophysics in Potsdam, for the first time, the existence of magnetic instability was confirmed, which can help create capacious long-lasting batteries and answer some questions about the structure of the universe.

Magnetic instabilities play a decisive role in the appearance of black holes, they regulate the rotation speed of collapsing stars and influence the behavior of powerful jets of matter, the so-called jets. In essence, magnetic instability is a change in the magnetic structure of a substance that tends to a stable thermodynamic equilibrium. Magnetic instability occurs when a strong current passes through an electrically conductive liquid. Starting from a certain current strength, its interaction with its own magnetic field creates vortex fluid flows. Similar structures can be observed in the form of huge jets in space.

Astrophysicists believe that one of the possible manifestations of magnetic instability is the "strange" behavior of neutron stars, which rotate much more slowly than theories predict. Scientists attribute the mysterious braking effect of neutron stars to the influence of magnetic instability, which reduces the rotation speed from a theoretical 1000 revolutions per second to about 10-100 revolutions per second.

The study of German scientists can help not only unravel the mysteries of astrophysics, but also create large liquid metal batteries that will pave the way for renewable energy sources.

Scientists believe that the phenomenon of magnetic instability can also be used on Earth, in particular in advanced batteries. The researchers came to the conclusion that, starting from reaching a certain current strength, powerful liquid flows can occur in liquid metal batteries, leading to a short circuit. During the experiment, magnetic instability in a liquid alloy (indium, gallium and tin) was obtained at room temperature and a current strength of 8000 amperes. Thus, scientists were able to discover a way to prevent the destruction of liquid metal batteries and increase their capacity. To do this, it is proposed to use large batteries and conductive tubes that will drain the reverse current.

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