Journal article

Authors list: Schwan, S; Schröder, D; Wegner, HA; Janek, J; Mollenhauer, D

Publication year: 2020

Pages: 5480-5488

Journal: Chemistry-Sustainability-Energy-Materials

Volume number: 13

Issue number: 20

ISSN: 1864-5631

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/cssc.202000454

Publisher: Wiley

Abstract: 
Quinone-based, aqueous redox flow batteries are a promising technology for large-scale, low-cost energy storage. To understand the influence of substituent and substituent pattern effects of quinone-based derivatives on the redox potential, a screening study was performed that included benzoquinone, naphtaquinone, and anthraquinone derivatives. The order of substituent influence is -OH>-Me/-OMe for decreasing the redox potential and -F<-SO3-<-CN, -NO(2)for increasing the redox potential, which is in agreement with general expectations. We found that the consideration of resonance and inductive effects design strategies of redox-active materials can be extended by the ability of intramolecular hydrogen bond formation, steric hindrance, and energetic differences of conformers for oxidized and reduced species. Due to the complexity and overlap of these effects, theoretical screening studies can provide guidance for the design of new molecular materials. In addition to the redox potential, other parameters such as stability, solubility, and kinetic rate constant or synthetic accessibility are crucial to consider.

Harvard Citation style: Schwan, S., Schröder, D., Wegner, H., Janek, J. and Mollenhauer, D. (2020) Substituent Pattern Effects on the Redox Potentials of Quinone-Based Active Materials for Aqueous Redox Flow Batteries, Chemistry-Sustainability-Energy-Materials, 13(20), pp. 5480-5488. https://doi.org/10.1002/cssc.202000454

APA Citation style: Schwan, S., Schröder, D., Wegner, H., Janek, J., & Mollenhauer, D. (2020). Substituent Pattern Effects on the Redox Potentials of Quinone-Based Active Materials for Aqueous Redox Flow Batteries. Chemistry-Sustainability-Energy-Materials. 13(20), 5480-5488. https://doi.org/10.1002/cssc.202000454