Why clean energy is turning to exotic ideas to fix its storage problem.
like gas and coal, which environmentalists hope to eliminate as energy sources, can supply power to the grid in just a few seconds and don’t have such shortcomings; it’s hoped that grid-scale storage can replace at least some of that “on-demand” need for electricity.
That might be from minute to minute — when a cloud passes in front of the sun, for instance — or at different hours of the day, such as when there’s no wind during the times of peak demand for electricity in the afternoons and evenings.
Although the chemistry behind iron-air batteries isn’t new, they’ve been overlooked because they are too heavy to be portable. Form Energy said its proprietary technology for extracting oxygen from the air through a membrane makes the chemistry feasible for stationary storage, and at a much lower cost than equivalent lithium-ion facilities.
Iron-air batteries are just one of many ideas for grid-scale storage, according to Chris Knittel, a professor of applied economics who directs the Massachusetts Institute of Technology’s Center for Energy and Environmental Policy Research.
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