Researchers from Yaroslav-the-Wise Novgorod State University have unveiled a novel energy source designed for emergency lighting and monitoring systems in coastal environments. This device operates on the principle of a magnesium-air galvanic cell, intended as a replacement for conventional solar panels and lithium batteries.
The primary benefit of this new battery is its absolute ecological safety. Unlike standard energy storage units, it contains no heavy metals or toxic lithium compounds. Electricity generation is achieved through the controlled dissolution of a magnesium plate within a saline (salt) solution, reacting with atmospheric oxygen. The sole byproduct of this reaction is magnesium hydroxide, which is entirely innocuous. Furthermore, the unit maintains its operational capacity for decades when kept dry, requiring only the addition of the solution for immediate activation.
The system achieves high efficiency thanks to its air cathode. This component features a sophisticated, multilayered design incorporating membranes and carbon fabric coated with platinum. This structure allows the battery to effectively “breathe,” drawing oxygen from the air to sustain the necessary chemical reaction. Employing a platinum catalyst prevents power decay and guards against the formation of undesirable chemical byproducts, thereby ensuring consistent operation of the connected light or sensor over extended periods.
Magnesium-air cells are suitable for various applications, including emergency illumination of jetties, powering meteorological sensors, ocean monitoring systems, and use within protected coastal nature reserves.
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