Lithium-sulfur batteries are expected to cost less than half per kWh compared to current lithium-ion batteries. Credit: luchschenF/Shutterstock.

Stellantis and Zeta Energy have announced a joint development agreement focused on enhancing battery cell technology for electric vehicles.

The collaboration aims to develop lithium-sulphur EV batteries with “game-changing” gravimetric energy density matching the volumetric energy density of current lithium-ion technology.

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For customers, this could mean a significantly lighter battery pack with the same usable energy as contemporary lithium-ion batteries, enabling greater range, improved handling, and enhanced performance, the companies said.

Additionally, the technology is expected to improve fast-charging speed by up to 50%, making EV ownership more convenient.

Lithium-sulphur batteries are also projected to cost less than half the price per kWh of current lithium-ion batteries.

Stellantis chief engineering and technology officer Ned Curic said: “Our collaboration with Zeta Energy is another step in helping advance our electrification strategy as we work to deliver clean, safe and affordable vehicles.

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 “Groundbreaking battery technologies like lithium-sulphur can support Stellantis’ commitment to carbon neutrality by 2038 while ensuring our customers enjoy optimal range, performance and affordability.”

The batteries will be produced using waste materials and methane, resulting in significantly lower CO2 emissions than any existing battery technology.

Zeta Energy’s battery technology is designed to be manufacturable within existing gigafactory infrastructure and would leverage a short, entirely domestic supply chain in Europe or North America.

The collaboration includes both pre-production development and planning for future production.

Zeta Energy CEO Tom Pilette said: “We are very excited to be working with Stellantis on this project. The combination of Zeta Energy’s lithium-sulphur battery technology with Stellantis’ unrivalled expertise in innovation, global manufacturing and distribution can dramatically improve the performance and cost profile of electric vehicles while increasing the supply chain resiliency for batteries and EVs.”

Upon completion, the batteries are expected to power Stellantis electric vehicles by 2030.

Stellantis’ Dare Forward 2030 strategy prioritises the development of “high-performing and affordable” EVs, aiming to launch over 75 battery electric models.

The company adopts a dual-chemistry approach to meet diverse customer needs while advancing innovative battery cell and pack technologies.