It’s hard to imagine a decarbonized grid without batteries that can last longer — far longer — than the four hours today’s grid-scale, lithium-ion batteries can pump power onto the grid. But who’s going to pay for it? That’s the question developers and researchers are puzzling over as the U.S. electricity grid struggles to replace aging generation and transmission infrastructure. At the same time, forecast demand for electricity is surging thanks to electrification of transportati...
