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Ride Radar > Blog > Technology > Researchers develop electrolyte additives to enhance energy storage for lithium-sulfur batteries
Technology

Researchers develop electrolyte additives to enhance energy storage for lithium-sulfur batteries

Last updated: January 15, 2025 11:00 am
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Unlocking the Potential of Lithium-Sulfur Batteries at DOE’s Argonne National Laboratory

As society continues its shift towards a more electrified world, the demand for advanced energy storage solutions is ever-growing. Lithium-ion (Li-ion) batteries have been a cornerstone of this transformation, powering everything from smartphones to electric vehicles. However, scientists worldwide are now looking beyond Li-ion batteries in search of even better alternatives, leading to the emergence of lithium-sulfur (Li-S) batteries.

Li-S batteries offer the promise of higher energy densities and reduced costs compared to traditional Li-ion batteries. With an anode of lithium metal and a cathode of sulfur, these batteries utilize Earth-abundant resources, making them a more sustainable option for the future.

“With further optimization and development of sulfur electrodes, we believe Li-S batteries can achieve higher energy density and better overall performance, contributing to their commercial adoption.” — Guiliang Xu, Argonne chemist

Despite their potential, Li-S batteries face challenges such as short cycle life and issues related to the migration of polysulfide ions within the system. Addressing these challenges is crucial for the widespread adoption of Li-S batteries.

Researchers at the U.S. Department of Energy’s Argonne National Laboratory have made significant progress in overcoming these obstacles through the development of innovative electrolyte additives. By introducing a new class of additive known as a Lewis acid additive, the team has been able to improve battery performance by controlling the reactions between the additive and sulfur compounds.

The Lewis acid additive forms a protective film over both the anode and cathode, suppressing the shuttle effect of polysulfides and enhancing the stability and performance of the battery. This breakthrough electrolyte design minimizes sulfur dissolution and promotes a more efficient ion transport pathway throughout the electrode.

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To validate their findings, the researchers compared their electrolyte with the additive to a conventional electrolyte used in Li-S batteries. Through advanced X-ray techniques at facilities like Argonne’s Advanced Photon Source, they confirmed a significant reduction in polysulfide formation and dissolution, paving the way for improved battery performance.

Looking ahead, the team at Argonne National Laboratory is also focused on addressing the stability and safety concerns associated with lithium metal in Li-S batteries. By developing better electrolytes to stabilize the lithium metal and reduce flammability risks, they aim to ensure the safety and reliability of Li-S batteries for future applications.

Through a combination of innovative research and cutting-edge technologies, Argonne National Laboratory is at the forefront of unlocking the full potential of lithium-sulfur batteries. With further advancements in electrode optimization and electrolyte design, Li-S batteries may soon become the go-to choice for high-energy density and sustainable energy storage solutions.

TAGGED:additivesbatteriesdevelopelectrolyteenergyenhanceLithiumsulfurResearchersstorage
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