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High Energy Density in Azobenzene-based Materials for Photo-Thermal Batteries via Controlled Polymer Architecture and Polymer-Solvent Interactions

Jeong, Seung Pyo; Renna, Lawrence A.; Boyle, Connor J.; Kwak, Hyunwook S.; Harder, Edward; Damm, Wolfgang; Venkataraman, Dhandapani

By 12 March 2019No Comments

Scientific Reports, 2017, vol 7, 1, pp. 17773

DOI:10.1038/s41598-017-17906-w

Abstract

Energy densities of ~510 J/g (max: 698 J/g) have been achieved in azobenzene-based syndiotactic-rich poly(methacrylate) polymers. The processing solvent and polymer-solvent interactions are important to achieve morphologically optimal structures for high-energy density materials. This work shows that morphological changes of solid-state syndiotactic polymers, driven by different solvent processings play an important role in controlling the activation energy of Z-E isomerization as well as the shape of the DSC exotherm. Thus, this study shows the crucial role of processing solvents and thin film structure in achieving higher energy densities.

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