Solid Oxide Fuel Cell Breakthrough

A major breakthrough in solid oxide fuel cell (SOFC) technology is opening the door to more affordable, efficient, and practical clean energy systems.

For decades, researchers have sought to decrease the size and corresponding capital costs of SOFCs by increasing power density, while also trying to lower operating temperatures to reduce system costs, shorten startup times, and improve long-term durability. The challenge has been the tradeoff between these two goals as SOFCs have required high temperature to achieve high power density.

A recently published paper in Advanced Energy Materials from the lab of University of Maryland (UMD) Distinguished University Professor and Director of the Maryland Energy Innovation Institute (MEI²), Dr. Eric Wachsman, demonstrates a novel ceria-based electrolyte structure that with increased oxygen pressure at the cathode, significantly reduces energy losses, enhances overall performance, and helps unlock the full potential of advanced SOFCs operating at lower temperatures.

Using this strategy with their newly developed nano-engineered cathode technology, the group achieved a record-setting performance of 4 W/cm² at just 650°C—the highest power density ever reported for a low-temperature SOFC.

These results show that pressurization can be a practical pathway to next-generation fuel cells that are more efficient, more durable, and more cost-effective; thus, bringing this high-performance clean energy technology one step closer to widespread deployment.

“These high-power density lower temperature SOFCs can not only address the rapidly growing data center demand for low cost and efficient power generation but also enable electrification of aviation and heavy-duty transport” said Wachsman.

The breakthrough will be a key component of the recently received Grand Challenges Impact Award from UMD. This initiative will integrate cross-disciplinary expertise to not only provide input to help guide the State of Maryland’s policy for AI and quantum data center deployment, but to chart a national and global path toward sustainable and ethical AI infrastructure. Deployment of advanced SOFCs to power these datacenters can both bring down the cost to rate payers and reduce GHG emissions due to their higher efficiency compared to the growing deployment of natural gas turbines.

S. A. Horlick, Y.-L. Huang, K. L. Duncan, et al. “High Power Density, Low Temperature, Solid Oxide Fuel Cells at Elevated Oxygen Partial Pressure.” Advanced Energy Materials (2026): e71242. https://doi.org/10.1002/aenm.71242

Published July 8, 2026