Evaluating Dihydroazulene/Vinylheptafulvene Photoswitches for Solar Energy Storage Applications

Wang, Zhihang,1989Chalmers tekniska högskola,Chalmers University of Technology (författare)

Efficient solar energy storage is a key challenge in striving toward a sustainable future. For this reason, molecules capable of solar energy storage and release through valence isomerization, for so-called molecular solar thermal energy storage (MOST), have been investigated. Energy storage by photo-conversion of the dihydroazulene/vinylheptafulvene (DHA/VHF) photothermal couple has been evaluated. The robust nature of this system is determined through multiple energy storage and release cycles at elevated temperatures in three different solvents. In a nonpolar solvent such as toluene, the DHA/VHF system can be cycled more than 70 times with less than 0.01% degradation per cycle. Moreover, the [Cu(CH(3)CN4] P-6-catalyzed conversion of VHF into DHA was demonstrated in a flow reactor. The performance of the DHA/VHF couple was also evaluated in prototype photoconversion devices, both in the laboratory by using a flow chip under simulated sunlight and under outdoor conditions by using a parabolic mirror. Device experiments demonstrated a solar energy storage efficiency of up to 0.13% in the chip device and up to 0.02% in the parabolic collector. Avenues for future improvements and optimization of the system are also discussed.

Udmark, J.Köpenhamns universitet,University of Copenhagen (författare)
Börjesson, Karl,1982Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg(Swepub:cth)kb01boka (författare)
Rodrigues, Rita,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)rrita (författare)
Roffey, Anna,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)roffey (författare)
Abrahamsson, Maria,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)abmaria (författare)
Nielsen, M. B.Köpenhamns universitet,University of Copenhagen (författare)
Moth-Poulsen, Kasper,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mkasper (författare)
Chalmers tekniska högskolaKöpenhamns universitet (creator_code:org_t)

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