Pacific Northwest National Laboratory has developed a long duration 'hibernating' battery made with an electrolyte that can be chilled from a liquid to a solid when excess renewable energy is abundant, then thawed to release energy when needed.
in concentrating solar power systems without blowing the whole thing up. That requires a substantial improvement in the metals and other materials that make up a CSP system. The solution involves nickel, which is also in play for the PNNL hibernating battery.
“The…aluminum-nickel molten-salt battery is chock full of Earth-abundant, common materials,” PNNL explains, noting that the anode is a solid plate of aluminum, and the cathode is a plate of nickel. They settled on fiberglass, and the results are impressive. Before the price of nickel suddenly spiked in recent months, the materials used in the new hibernating battery cost a total of just $23 per kilowatt hour, more or less.
“The battery’s theoretical energy density is 260 watt-hours per kilogram — higher than today’s lead-acid and flow batteries,” PNNL also notes.
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