en.Wedoany.com Reported - A research team at Monash University in Australia has successfully developed an ultra-thin nanomembrane that allows hydrogen fuel cells to operate stably at high temperatures of 250°C (482°F). This membrane can function normally under anhydrous conditions, thereby eliminating a key barrier to the widespread adoption of fuel cells and potentially accelerating the large-scale deployment of this clean energy system.
As countries seek alternatives to fossil fuels, hydrogen fuel cells have garnered significant attention due to their zero carbon emissions (producing only water and heat). Unlike solar and wind energy, fuel cells can generate power on demand, making them suitable for various applications including data centers, space missions, passenger vehicles, and aircraft. However, traditional fuel cells rely on water to transport protons, and water evaporates at high temperatures, making it difficult for the cells to operate efficiently in high-temperature environments.
The Monash University team utilized graphene and boron nitride materials to develop atomically thick nanosheets and introduced nano-confined phosphoric acid within them, enabling rapid proton transport without the need for water. This design overcomes the previous issue of low proton transport efficiency between nanosheet layers.
"By combining proton-conducting nanosheets with nano-confined phosphoric acid, we have created a membrane that maintains rapid proton transport without relying on water," said Professor Huanting Wang from the Department of Chemical and Biological Engineering at Monash University. "This allows the fuel cell to operate efficiently at temperatures far exceeding what is currently feasible." In laboratory tests, the membrane achieved ultrafast proton transport at 250°C. Furthermore, the membrane performed excellently even when using concentrated methanol as fuel, demonstrating its reliability under harsh conditions.
Dr. Keqiang He, a postdoctoral researcher at Monash University involved in the study, pointed out: "The nanosheets provide direct pathways for proton transport, while the confined phosphoric acid enables rapid proton hopping. These two mechanisms work together to ensure high conductivity and stability under high-temperature, dry conditions." The researchers believe this achievement resolves a long-standing bottleneck in membrane design, contributing to the advancement of high-temperature electrochemical systems. Beyond fuel cells, this membrane can also be applied in areas such as water splitting, carbon dioxide reduction, and ammonia synthesis.
The related research findings were recently published in the journal Science Advances.
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