Enhancing organic cathodes of aqueous zinc-ion batteries <i>via</i> nitro group modification.

ABSTRACT: Organic compounds present promising options for sustainable zinc battery electrodes. Nevertheless, the electrochemical properties of current organic electrodes still lag behind those of their inorganic counterparts. In this study, nitro groups were incorporated into pyrene-4, 5, 9, 10-tetraone (PTO), resulting in an elevated discharge voltage due to their strong electron-withdrawing capabilities. Additionally, a novel electrochemical conversion of nitro to azo groups was observed in aqueous electrolytes. This transformation can be leveraged to enhance cycling stability, especially at low current densities. The electrochemical process of nitro-PTO during discharge comprises three distinct steps. Initially, two stages of H⁺/Zn²⁺ coordination to the carbonyl groups led t

SUBMITTER: Wang D 

PROVIDER: S-EPMC11770806 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature