Quinones & Analogues For Energy Storage & Batteries
Organic redox flow batteries are large-scale energy storage devices that store energy in organic solutions. The key components of the battery are electrolyte, separator and electrodes. Quinone is an organic compound with a highly conjugated structure. Natural quinones include benzoquinone, naphthoquinone, and anthraquinone. Quinones and analogues are structurally designable and have important applications in the field of organic redox flow batteries. Quinones and analogues have good electrochemical reversibility, and their redox mechanism is the reciprocal conversion between enolation and carbonylation promoted by the conjugated structure. During charging, the carbonyl group on the aromatic ring gets electrons and protons to combine and reduce to phenolic hydroxyl group. During discharge, the phenolic hydroxyl group loses electrons and protons and transforms into a carbonyl group. The introduction of quinone and analogues makes the flow battery have the advantages of high capacity, good cyclability, environmental protection, and low cost.
Figure 1. The charge-discharge reaction equation of hydroxyanthraquinone
Have a question? Get a Free Consultation