There's a paper battery that starts to run from water and then decomposes

There's a paper battery that starts to run from water and then decomposes

The Empa battery has been developed by scientists from the Swiss Institute; the battery is designed for use, for example, in environmental sensors and one-time medical diagnostics.

Each Empa cell is 1 cm2 and its paper base is soaked with sodium chloride.

On one side of the paper is ink containing graphite cereals, which work as a cathode. On the other side of the ink with zinc powder is anode.

Next, the ink on both sides covers another layer of paint with graphite cereal and soot content — it connects the cathode and anode with two wires at the same end.

If you put some water on the battery, it dissolves salt in the paper and releases charged ions. When these ions begin to migrate through the wet layer of paper to the other side of the plate, they cause zinc to oxidize in the anode, releasing electrons.

As a result, these oxidation-remediation reactions generate an electrical current that can be used to supply the external electrical device.

During the laboratory tests, the battery ' s two-element version was successful in feeding a small alarm with a LK-display.

Only two droplets of water are sufficient to activate one cell within 20 seconds. The battery voltage was 1.2 volts. The cell's output dropped considerably within an hour, as the paper dried up, although it could maintain a working voltage of 0.5 volts for the next hour after being subjected to two more drops of water.