It promises 50 percent efficiency when storing power and 80 percent when producing hydrogen – with an estimated life expectancy of ten years.
Such long-term storage solutions are necessary, given the unpredictable nature of such resources. Such uncertainty has prompted authorities to maintain conventional power plants, sustain a "complex dual power infrastructure, burn fossil fuels, and hold back the transition to renewables."The beginning point for the research was the conventional zinc anode battery designs.
"This is a unique combination of a regular battery and a source for hydrogen, with a total electrical storage efficiency of 50%, which is double the efficiency of other, currently preferred power-to-gas systems," Dr. Robert Hahn of Fraunhofer IZM, who is in charge of coordinating the work on the project.
The new system uses energy stored during charging in metallic zinc, with Hydrogen being held in the water of the electrolyte at ambient pressure and significantly higher density than pressurized or liquid hydrogen gas. "During discharge, the metallic zinc is converted into zincate, and the cell releases hydrogen and 8.
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