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Titania-Based Coral-Structured Solar Absorber Coating with Improved Scalability and Durability at High Temperature
Yifan Guo1, Kaoru Tsuda2, Milad Mohsenzadeh1
1ANU HEAT Lab, School of Engineering, The Australian National University, Canberra, 2601, Australia.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|September 20, 2024
Summary
A new titania-bonded coral-structured coating enhances solar thermal energy capture. This scalable coating resists delamination and degradation, improving solar absorber durability for concentrating solar thermal systems.
Area of Science:
- Materials Science
- Renewable Energy Technologies
Background:
- Hierarchical coral-structured coatings offer high solar absorptance for concentrating solar thermal (CST) systems.
- Interfacial delamination and scalability issues hinder industrial adoption of current CST coatings.
Purpose of the Study:
- To develop a robust and scalable coral-structured coating for CST systems.
- To address interfacial delamination and material complexity challenges in CST coatings.
Main Methods:
- Fabrication of a novel coral-structured coating using titania to bond black pigments.
- Drone deposition technique for facile and large-scale application.
- Long-term aging tests at high temperatures (up to 600°C) for 3000 hours.
Main Results:
- The titania-bonded coating effectively mitigates interfacial delamination.
- Drone deposition ensures scalability for large solar receivers.
- The coating maintains stable solar absorptance after prolonged high-temperature aging, inhibiting cation diffusion.
Conclusions:
- The developed titania-bonded coral-structured coating offers a scalable and durable solution for CST applications.
- This advancement facilitates improved light-trapping and maintenance strategies in solar energy harvesting.
- The coating's stability and facile deposition pave the way for wider industrial implementation of CST technology.
