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Thermoelectric ink turns car exhaust pipes into power generators
by Staff Writers
Ulsan, South Korea (SPX) Aug 27, 2021

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A joint research team, affiliated with UNIST has announced that they have successfully developed a thermoelectric technology to produce power-generating tubes using 3D printing techniques.

Researchers found that the tube-shaped device is more effective than conventional devices. This breakthrough has been jointly led by Professor Han Gi Chae and Professor Jae Sung Son from the Department of Materials Science and Engineering, and Professor Sung Youb Kim from the Department of Mechanical Engineering at UNIST.

"Through this research, we will be able to effectively convert heat generated by factory chimneys, the most common type of waste heat source, into electricity," said Professor Son. He said this is because the existing thermoelectric devices were in rectangular parallelepiped shapes.

In this study, researchers created the thermoelectric tube using a 3D printed ink made of lead (Pb) and tellurium (Te). Metal particles were mixed inside a glycerol solvent to provide viscoelasticity, a status that exhibits both viscous and elastic characteristics.

The tube has a high thermoelectric performance at temperatures between 400 and 800 degrees Celsius, which is the temperature range of a car's exhaust gases. The tube shape makes it more effective in collecting heat than a conventional cuboid type.

"If we use 3D printing technology in the production of thermoelectric materials, we will be able to overcome limits of conventional materials," said Professor Chae. "The new technology for providing viscoelastic characteristics to 3D printed materials will be used in various other sectors."

Their work has been featured on the front cover of Advanced Energy Materials, which was made available online in April 2021 ahead of final publication in May 2021. This study has been jointly participated by Professor Sangjoon Ahn, Dr. Jaehyung Hong, Professor Ji Eun Lee from Chonnam National University, and Jeongin Jang from Korea Electrotechnology Research Institute.

Research Report: "Doping-Induced Viscoelasticity in PbTe Thermoelectric Inks for 3D Printing of Power-Generating Tubes"


Related Links
Ulsan National Institute Of Science And Technology
Powering The World in the 21st Century at Energy-Daily.com


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ENERGY TECH
A novel energy storage solution featuring pipes and anchors
Vienna, Austria (SPX) Jun 24, 2021
What do pipes and anchors have to do with storing energy? More than you might think! A new IIASA-led study explored the potential of a lesser known, but promising sustainable energy storage system called Buoyancy Energy Storage. There is general consensus that renewable energy sources will play an important role in ensuring a healthier and more sustainable future for the planet and its people, and many countries are indeed already seeing such technologies displacing "dirty" fossil fuels in the pow ... read more

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