Latest in Tomorrow

Image credit: FADEL SENNA via Getty Images

Seaweed could be the key to long-lasting electric car batteries

A little bit of nature could help your EV go a long way.
549 Shares
Share
Tweet
Share
Save

Sponsored Links

FADEL SENNA via Getty Images

Lithium-sulfur batteries are theoretically ideal for powering gadgets. They have more than twice the energy density of lithium-ion packs, but at a much lower cost thanks to sulfur's dirt-cheap price. There's just one problem: sulfur dissolves, giving the battery a short lifespan. That's where Berkeley Lab might help. It recently discovered that a derivative of red seaweed, carrageenan, can stabilize a lithium-sulfur battery and make it practical for more devices. If you use the seaweed derivative as a binder (the "glue" that keeps a battery's active materials together), it reacts with the sulfur and prevents it from dissolving. The ultimate goal is to produce cells that last for "thousands" of charging cycles, or better than many batteries you see today.

Some of the practical benefits are immediately evident. Your phone could last much longer on a charge even as the price went down. However, the researchers are eager to point out the potential uses in transportation. As lithium-sulfur is lighter than lithium-ion, it's ideal for drones and other electric aircraft. The technology could also prove to be a minor miracle for electric cars. GM is one of Berkeley Lab's partners, so it's easy to imagine the Chevy Bolt maker using lithium-sulfur in future EVs that are both more affordable and drive much further on a charge.

The gotcha? It's still quite early. The team needs to understand more about how the derivative interacts with sulfur, and whether or not it's reversible if necessary. It may be a long while before you see a lithium-sulfur battery on the road or in your pocket. All the same, it's notable that the technology is even on the roadmap. We've seen many promises of longer-lasting batteries, but the low-cost nature of this solution should give it a better shot at reaching real-world products.

All products recommended by Engadget are selected by our editorial team, independent of our parent company. Some of our stories include affiliate links. If you buy something through one of these links, we may earn an affiliate commission.
Comment
Comments
Share
549 Shares
Share
Tweet
Share
Save

Popular on Engadget

The best consoles, games and accessories for students

The best consoles, games and accessories for students

View
Sony and Yamaha are making a self-driving cart for theme parks

Sony and Yamaha are making a self-driving cart for theme parks

View
Trump tries to overturn ruling stopping him from blocking Twitter users

Trump tries to overturn ruling stopping him from blocking Twitter users

View
Divorce dispute leads to accusation of crime in space

Divorce dispute leads to accusation of crime in space

View
OnePlus 7T might pack a wide-angle camera

OnePlus 7T might pack a wide-angle camera

View

From around the web

Page 1Page 1ear iconeye iconFill 23text filevr