Cyclodextrin metal-organic frameworks as templates for ordered polymerisation of polyaniline in supercapacitors with enhanced electrochemical performance

A cyclodextrin metal-organic framework (CD-MOF) was used as a synthesis template to guide the ordered polymerisation of polyaniline (PANI). The resulting PANI/CD-MOF composites (PM) were successfully prepared via interfacial polymerisation, with their structure and properties regulated by adjusting the concentrations of aniline and CD-MOF. The electrochemical performance of PM was evaluated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). Experimental results demonstrated that the material exhibited excellent electrochemical performance in supercapacitors. Specifically, when the aniline concentration was 0.04 mol/L, PM-0.04 achieved a capacitance of 628.8 F/g at 1 A/g. Furthermore, a symmetric supercapacitor assembled with PM-0.04 exhibited a specific capacitance of 119.4 F/g at 1 A/g, along with good cycling stability at 5 A/g. These results demonstrate the potential of CD-MOF-based composites in enhancing the performance of supercapacitors, offering high specific capacitance, good cycling stability, and rapid charge-discharge capability.