Designed synthesis of Salen-based covalent organic frameworks as high-performance capacitive materials

Abstract

Two Salen-based covalent organic frameworks (COFs), Salen-TAPT-COF and Salen-Por-COF, are successfully prepared and the electrochemical performance has been studied. At a current density of 0.5 A·g⁻¹, their specific capacitances are 88.3 and 152.8 F·g⁻¹, respectively. After 5000 cycles, the values can still reach 94% and 86% demonstrating good cycling stability. The excellent performance originated from their structures containing Salen-linker, and N-containing heterocycle which make them potential useful as electrode materials for superior performance capacitors.