Solar Energy Storage by Molecular Norbornadiene–Quadricyclane Photoswitches: Polymer Film Devices
Journal article, 2019

Devices that can capture and convert sunlight into stored chemical energy are attractive candidates for future energy technologies. A general challenge is to combine efficient solar energy capture with high energy densities and energy storage time into a processable composite for device application. Here, norbornadiene (NBD)–quadricyclane (QC) molecular photoswitches are embedded into polymer matrices, with possible applications in energy storing coatings. The NBD–QC photoswitches that are capable of absorbing sunlight with estimated solar energy storage efficiencies of up to 3.8% combined with attractive energy storage densities of up to 0.48 MJ kg −1 . The combination of donor and acceptor units leads to an improved solar spectrum match with an onset of absorption of up to 529 nm and a lifetime (t 1/2 ) of up to 10 months. The NBD–QC systems with properties matched to a daily energy storage cycle are further investigated in the solid state by embedding the molecules into a series of polymer matrices revealing that polystyrene is the preferred choice of matrix. These polymer devices, which can absorb sunlight and over a daily cycle release the energy as heat, are investigated for their cyclability, showing multicycle reusability with limited degradation that might allow them to be applied as window laminates.

solid state materials

heat release

solar energy storage

solar thermal

Author

Anne U. Petersen

Chalmers, Chemistry and Chemical Engineering

Anna Isabel Hofmann

Chalmers, Chemistry and Chemical Engineering

Méritxell Fillols

Chalmers, Chemistry and Chemical Engineering

Mads Mansø

University of Copenhagen

Martyn Jevric

Chalmers, Chemistry and Chemical Engineering

Zhihang Wang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Kasper Moth-Poulsen Group

Christopher Sumby

University of Adelaide

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Christian Müller Group

Kasper Moth-Poulsen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Kasper Moth-Poulsen Group

Advanced Science

2198-3844 (ISSN)

1900367

Subject Categories

Other Environmental Engineering

Theoretical Chemistry

Energy Systems

DOI

10.1002/advs.201900367

More information

Latest update

7/15/2019