Unlocking the Charge‐Storage Potential of a Phenanthraquinone‐based Two‐Dimensional Covalent Organic Framework (2D COF)

Abstract

AbstractThe high surface area, open pore‐structure and atomic‐level organization inherent in many covalent organic frameworks (COFs) make them an attractive polymer platform for developing functional materials. Herein, a chemically robust 2D COF (TpOMe‐DAPQ COF) containing phenanthraquinone moieties was prepared by condensing 2,4,6‐trimethoxy‐1,3,5‐benzenetricarbaldehyde (TpOMe) and 2,7‐diamino‐9,10‐phenanthraquinone (DAPQ) using the convenient mechanochemical method. The poor charge‐storage capacity of the pristine TpOMe‐DAPQ COF was substantially improved by first investigating its redox‐site accessibility (RSA) using different conductivity‐enhancement methods, and then optimizing the amount of EDOT needed to perform an in‐situ polymerization. The resulting composite (0.4EDOT@TpOMe‐DAPQ) was characterized and its enhanced charge‐storage capabilities enabled it to be used as an anode material in an aqueous Mn beaker‐cell battery capable of delivering 0.76 V. This work outlines the rational design approach used to develop a functional charge‐storage material utilizing a COF‐based polymerization platform.