High-performance thermal switches with earth-abundant cerium oxide
Author Information
Author(s): Jeong Ahrong, Yoshimura Mitsuki, Kong Hyeonjun, Bian Zhiping, Tam Jason, Feng Bin, Ikuhara Yuichi, Endo Takashi, Matsuo Yasutaka, Ohta Hiromichi
Primary Institution: Hokkaido University
Hypothesis
Can cerium oxide be used to create high-performance solid-state electrochemical thermal switches?
Conclusion
The study demonstrates that CeO2-based thermal switches can achieve a high on/off thermal conductivity ratio and wide switching width, making them suitable for thermal management applications.
Supporting Evidence
- The on/off thermal conductivity ratio achieved was 5.8.
- The thermal conductivity switching width was measured at 10.3 W m−1 K−1.
- CeO2 is an earth-abundant material, making it suitable for sustainable applications.
Takeaway
Scientists made a special switch that can turn heat flow on and off using a common material called cerium oxide, which is good for saving energy.
Methodology
The study involved fabricating CeO2-based thermal switches and testing their thermal conductivity through electrochemical reduction and oxidation cycles.
Limitations
The performance of the thermal switches may still be lower compared to other types, and the study focused on a specific temperature range.
Digital Object Identifier (DOI)
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