Hydrogen Aircraft, Electrochromic Device and Vacuum Coaters

19/04/2024 - 10:30
Prof. Dr. Diao Xungang, School of Energy and Power Engineering, Beihang University, Beijing, China
Sala de Seminários José Roberto Leite - Ed. Alessandro Volta (bloco C)

Hydrogen powered airplane through hydrogen produced electricity or directly combusted jet engines can dramatically reduce carbon emissions and is recognized as the most promising future green aviation transportation. The presentation will give an introduction to the recent development and the history of hydrogen aircraft in different countries over the world and some critical technologies on hydrogen aircraft such as proton exchange membrane fuel cells and hydrogen powered engines, as well as their relevant materials with hydrogen embrittlement and electrochemical corrosion protections. Liquid hydrogen storage is also briefly introduced.

All inorganic thin film elelctrochromic materials and multilayer devices are introduced on their fabrication methods, properties on materials fundamentals and electrochemical cycling, their multi-functional applicable performances on solar energy, infrared and other electromagnetic wave spectra modulations. Typical multilayer electrochromic devices Glass/ITO/WO3/LiTaO3/NiOx/ITO and PI/Al/WO3/LiTaO3/NiOx/ITO have been monolithically fabricated layer by layer on a home-made multi-target magnetron sputtering machine. The maximum transparency and reflectance difference in the visible light spectrum region between coloration and bleaching states reaches as high as 80%. Within infrared range, we also get about 0.4-0.6 emissivity modulations recently.

Some vacuum magnetron sputtering and cathodic arc coating machine structures have innovatively designed, optimized and manufactured deliberately for fabricating our multilayer functional electrochromic thin film devices, as well as serving our electrochemical corrosion resistant nitride and carbide protective coatings for metallic bi-polar plates in hydrogen fuel cell and water electrolyzer applications.

Brief Introduction about speaker:
Prof. Dr. Diao Xungang is a full professor of physics, material science and renewable energy technologies at School of Energy and Power Engineering, Beihang University, Beijing, China. He has studied and worked at Lanzhou University, Institute of Physical and Chemical Engineering of Nuclear Industry, Tsinghua University, Brazilian Center for Physics Research - CBPF, Brazil, Research Institute of Physics and Chemistry - RIKEN, Japan, Royal Institute of Technology - KTH, Sweden, and Tianjin University. He has published more than 210 academic papers with 3300 citations and H-index 35, been responsible for more than 40 scientific and technological research projects, obtained 12 invention patents, 5 scientific research and education awards on diverse research achievements and university physics teaching in English for foreign students. He has also worked for totally about 15 years on some special engineering and technological researches in China which was not allowed for academic journal publications. 

Desenvolvido por IFUSP