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The material has practical applications in renewable energy storage, electric cars and defence and space technologies.
“Dielectric materials are used to make fundamental electrical components called capacitors, which store energy,” said Associate Professor Yun Liu of the ANU Research School of Chemistry, co-author of the paper detailing the new material.
The new metal oxide dielectric material outperforms current capacitors in many aspects, storing large amounts of energy and working reliably from -190°C to 180°C, and is cheaper to manufacture than current components.
“Our material performs significantly better than existing high dielectric constant materials so it has huge potential. With further development, the material could be used in “supercapacitors” which store enormous amounts of energy, removing current energy storage limitations and throwing the door wide open for innovation in the areas of renewable energy, electric cars, even space and defence technologies,” said Associate Professor Liu.
The material could be particularly transformative for wind and solar power, which can cause problems when fed into the power grid at low demand times.
“Power going into the grid has to balance with the demand for power at any given time,” said co-author Professor Ray Withers. “This means that it is very important to be able to store energy until such time as it is really needed.”
Researchers have been trying to design new dielectric materials to make more efficient energy storage devices for years.
The design process has proven difficult because the materials need to meet three requirements: a very high dielectric constant, meaning they can store a lot of energy; a very low dielectric loss, meaning energy doesn’t leak out and get wasted; and the capacity to work across a broad range of temperatures. …