Since Alessandro Volta created the first true battery in 1800, improvements have been relatively incremental. When it comes to phones and especially electric vehicles, lithium-ion batteries have resisted a slew of efforts to increase their power and decrease the time it takes to charge them.
Henrik Fisker, known for his high-end sports-car design, says his Los Angeles– based company, Fisker Inc., is on the verge of a breakthrough solid-state battery that will give EVs like his sleek new EMotion an extended range and a relatively short charging period. “With the size of battery pack we have made room for, we could get as much as a 750-kilometer [466-mile] range,” he says. The same battery could reduce charging time to what it currently takes to fill your car with gas.
Traditional lithium-ion batteries, like all others, use a “wet” chemistry— involving liquid or polymer electrolytes—to generate power. But they also generate resistance when working hard, such as when they are charging or quickly discharging, which creates heat. When not controlled, that heat can become destructive, which is one reason that EVs have to charge slowly.
Solid-state batteries, as the name implies, contain no liquid. Because of this, they have very low resistance, so they don’t overheat, which is one of the keys to fast recharging, says Fisker. But their limited surface area means they have a low electrode-current density, which limits power. Practically speaking, existing solid-state batteries can’t generate enough juice to push a car. Nor do they work well in low temperatures. And they can’t be manufactured at scale.
This story is from the July/August 2018 edition of Inc..
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