4 ms·
They almost certainly mean triple compared to lithium ion (similarly for the 90% less energy claim). Lithium ion batteries currenty hit a maxium energy density
by chris_overseas 5y ago
They almost certainly mean triple compared to lithium ion (similarly for the 90% less energy claim). Lithium ion batteries currenty hit a maxium energy density of around 265Wh/kg, with a theoretical maximum of around 400-500Wh/kg[0][1]. Lithium sulphur batteries have a theoretical maximum of around 2500Wh/kg.
[0] https://cleantechnica.com/2020/02/11/lithium-sulfur-batteries-could-be-cheaper-more-energy-dense/ https://cleantechnica.com/2020/02/11/lithium-sulfur-batterie...
[1] https://www.lis.energy/site/li-s-energy-applications/lithium-sulphur-key-advantages https://www.lis.energy/site/li-s-energy-applications/lithium...
- stevespang 5y ago
- deleted 5y ago[deleted]
- hinkley 5y agoI've done the math a few times and I think there's an inflection point somewhere around 400WH/kg where auxiliary batteries for EVs become a viable option. Right now any replaceable battery is the domain of robotics, because there is no human-rated pack that would provide a compelling increase in range. Another factor of 2 and hauling a few 15kg cylinders or cubes out at a 'gas station' might get you to grandma's house or safely past a "no gas for 200 miles" sign.