Metal–organic framework coated porous structures for enhanced thermoelectric performance

Günay A. A., Harish S., Fuchi M., Kinefuchi I., Lee Y., Shiomi J.

Energy Conversion and Management, vol.255, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 255
  • Publication Date: 2022
  • Doi Number: 10.1016/j.enconman.2022.115289
  • Journal Name: Energy Conversion and Management
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Agricultural & Environmental Science Database, Applied Science & Technology Source, CAB Abstracts, Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, INSPEC, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Metal-organic framework, Thermoelectric generator, Atmospheric water harvesting, Evaporative cooling, Passive devices, Thermal management, WATER-VAPOR ADSORPTION, THERMAL MANAGEMENT, HEAT-TRANSFER, CONVECTION, DEVICES, DESIGN, DESORPTION
  • Middle East Technical University Affiliated: Yes


© 2022 Elsevier LtdSelf-powered sensors/transmitters can be operated by thermoelectric generators if the temperature difference across the device is maximized. Here, we demonstrate a novel strategy to increase the overall thermoelectric conversion efficiency near room temperature (≈30 °C) through enhancement of the heat transfer between the thermoelectric generator and the atmosphere by utilizing the latent heat of atmospheric water, radiative cooling, and an enhanced surface area. To maximize the sorption and emissivity, we coat porous copper substrates with metal-organic frameworks. Thermoelectric generators interfaced with these heat sinks exhibit a 50%–70% enhancement in the overall heat transfer coefficient owing to the increased surface area due to particle binding and the material properties of metal–organic frameworks. Furthermore, proof-of-concept experiments reveal an ≈100% increase in the total electromotive force generated by the thermoelectric generator within 30 min. Our study not only introduces a novel method to enhance the thermoelectric conversion efficiency, but also provides physical insight into the link between sorption and thermal processes.