Unlocking Sulfur Cathode Secrets

New research brings lithium-sulfur batteries closer to practical, high-capacity reality

Published on Mar. 5, 2026

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Researchers have developed a new method to create a sulfur-based composite cathode that delivers a high discharge specific capacity, bringing science closer to tapping sulfur's theoretical capacity. The work is the result of an ongoing industry-academia partnership with South Korean battery-maker LG Energy Solution, aiming to combine solid-state batteries' safety and stability with sulfur's high capacity and low cost.

Why it matters

As demand for electric vehicles and energy storage grows, new battery technologies that are powerful, affordable, and safe are crucial. Sulfur, with its high theoretical capacity and low cost, is an attractive battery material, but its practical implementation has been challenging. This research represents a significant step forward in unlocking sulfur's potential for real-world applications.

The details

The team created a sulfur-based composite cathode that delivers a discharge specific capacity of about 1500 milliampere-hours (mAh) per gram of sulfur, close to sulfur's theoretical capacity of 1675 mAh per gram. They achieved this by finding the perfect particle size for solid-state electrolyte powder and changing the fabrication strategy, including a one-step milling process that creates a uniform blend and a metastable interphase. The research also addresses the issue of "breathing" - the expansion and contraction of materials as the battery charges and discharges - by pairing a silicon negative electrode with a lithium sulfide positive electrode, which helps maintain mechanical stability.

  • The research was published on February 27, 2026.

The players

Chen-Jui (Ben) Huang

A postdoctoral researcher for the University of Chicago Pritzker School of Molecular Engineering (UChicago PME) and University of California San Diego Nanoengineering department's Laboratory for Energy Storage and Conversion (LESC).

Seung Bo Yang

A Senior Researcher at LG Energy Solution and Visiting Industrial Fellow at LESC.

Shirley Meng

A professor at UChicago PME and the first corresponding author of the new work.

LG Energy Solution

A South Korean battery-maker that is partnering with the academic researchers through its Frontier Research Lab (FRL) program.

University of Chicago Pritzker School of Molecular Engineering (UChicago PME)

The academic institution where some of the researchers are based.

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What they’re saying

“Price-wise, sulfur is the ultimate inexpensive material that you want to put in the battery.”

— Chen-Jui (Ben) Huang, Postdoctoral researcher

“Instead of adding new materials or coatings, this work shows that simply arranging the existing materials more carefully allows sulfur to react much more efficiently.”

— Seung Bo Yang, Senior Researcher at LG Energy Solution and Visiting Industrial Fellow at LESC

“High-performing batteries help no one sitting in labs. To hit our energy and climate goals, we need them out working in the real world. That means they must be affordable at scale.”

— Shirley Meng, Professor at UChicago PME

What’s next

The researchers plan to continue optimizing the sulfur-based composite cathode and demonstrate its performance in larger-scale pouch cell formats to further prove its scalability and potential for real-world EV applications.

The takeaway

This research represents a significant breakthrough in unlocking the potential of sulfur-based batteries, which could enable electric vehicles to travel significantly longer distances while maintaining safety and affordability. The collaboration between industry and academia is crucial to accelerating the development of next-generation battery technologies that can meet the growing demand for energy storage solutions.