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Energy Storage

Lithium sulfur overtaking lithium ion?

by Alex Scott
October 14, 2018 | A version of this story appeared in Volume 96, Issue 41
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Photo of lithium-sulfur battery.
Credit: Oxis Energy
Oxis hits new heights with its lithium-sulfur battery material.
A photo of a man next to stainless steel machinery in a lab.
Credit: Oxis Energy
Oxis develops lithium-sulfur batteries at labs in Culham, England.

U.K. battery materials start-up Oxis Energy says it has developed a prototype lithium-sulfur battery cell with an energy density of 425 watt-hours per kilogram, a level significantly higher than that of lithium-ion cells currently used to power electric cars. Oxis’s CEO, Huw Hampson Jones, anticipates the firm will have hiked the energy density of its cells to 500 Wh/kg by the end of 2019 and that commercialization will occur in the next two to three years. “The case for investing in lithium-ion gigafactories is a fool’s paradise,” he says.

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