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UniEnergy Technologies, a stationary energy storage provider based outside Seattle, has raised $25 million from the Japanese financial firm ORIX and earlier investors. UniEnergy manufactures flow batteries for utility-scale applications. The batteries store energy in two tanks of vanadium-containing electrolyte with different levels of charge. The firm says its chemistry, developed in 2011 at Pacific Northwest National Laboratory, overcomes the electrolyte stability problems of earlier vanadium-based systems.
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