The battery of the future without a sodium-based anode. Free Technical Library News

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Battery of the future without sodium anode

10.05.2021

Scientists have created a prototype sodium-based battery without an anode. Unlike lithium-ion power supplies, it is cheap and does not pollute the environment.

A typical lithium-ion battery has two electrodes, a cathode and an anode. They transfer the ions in the electrolyte solution to each other as the device charges and discharges. Scientists from Washington University in St. Louis tried to replace lithium with sodium metal.

Why are researchers interested in him? The fact is that it is metallic sodium - a widespread material.

When creating a power source, scientists abandoned the anode, adding instead a thin layer of copper foil. It is located on the anode side of the current collector, which collects free electrons as the battery discharges and directs them to the device that is powered.

A thin layer of copper acts as one of the electrodes. The result is a power supply that is much smaller and cheaper to manufacture analogues. At the same time, the performance of such a battery does not suffer. The authors of the development note that such a battery will reduce the cost and size of gadgets.

When this experimental battery is charged, instead of ions passing from the cathode through the spacer material to the anode, they are deposited on copper foil and become a shiny, smooth metal. Then, when the battery is discharged, the material dissolves and the ions return to the cathode.

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