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Molecular Solar Thermal Fuels with High Energy Density Based on Azobenzene Derivatives

Author

Listed:
  • Yan Jiang

    (School of Mechanical and Automotive Engineering, Zhaoqing University, Zhaoqing 526061, China)

  • Rui Liu

    (School of Mechanical and Automotive Engineering, Zhaoqing University, Zhaoqing 526061, China
    School of Electronic and Electrical Engineering, Zhaoqing University, Zhaoqing 526061, China)

  • Yupeng Guo

    (School of Mechanical and Automotive Engineering, Zhaoqing University, Zhaoqing 526061, China
    School of Electronic and Electrical Engineering, Zhaoqing University, Zhaoqing 526061, China)

  • Hai Wang

    (School of Mechanical and Automotive Engineering, Zhaoqing University, Zhaoqing 526061, China)

  • Wen Luo

    (School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China)

  • Jin Huang

    (School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
    School of Electric Engineering, Guangdong Polytechnic of Water Resources and Electric Engineering, Guangzhou 510635, China)

Abstract

Molecular solar thermal fuels (MOSTs) based on azobenzene derivatives have become one of the research hotspots for solar thermal conversion and storage due to their excellent cycling stability, resistance to photodegradation, and the capability to precisely adjust their absorption wavelengths, and other merits. Here, a novel MOST with connecting two azobenzene molecules by a short linkage (bis-AZO) has been proposed; the photoisomerization regulation and energy storage performance are studied experimentally in detail. The photoisomerization rate of the resultant MOST could be controlled by diverse irradiation intensities. The energy density for bis-AZO was 275.03 J g −1 at 100% isomerization degree, with excellent thermal and photochemical cycling stability. The macroscale heat release of bis-AZO loaded on fabric reached a temperature increase of about 4.3 °C. This research offers a new design strategy for increasing the energy density in azobenzene-based molecular solar thermal fuels.

Suggested Citation

  • Yan Jiang & Rui Liu & Yupeng Guo & Hai Wang & Wen Luo & Jin Huang, 2025. "Molecular Solar Thermal Fuels with High Energy Density Based on Azobenzene Derivatives," Energies, MDPI, vol. 18(11), pages 1-14, May.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:11:p:2672-:d:1661404
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