Synthesis of Multi-Porous Polypyrrole-Based Film Electrodes through Gamma Ray Irradiation and Diatom Etching for High Performance Supercapacitors
摘要
In this study, pyrrole (Py) monomers, carbon nanotubes (CNT) and diatomite were loaded on the filter paper. Through polymerization induced by gamma ray irradiation, polypyrrole (PPy) coated diatom (PPy@diatom) and carbon nanotubes (PPy@CNT@diatom) conductive film electrode were prepared. The subsequent etching reaction effectively removed the diatom and made the film retain the ordered porous microstructure of the diatom. By comparing the Fourier transform infrared (FTIR) spectrum, atomic force microscope (AFM) and the scanning electron microscope (SEM) image of the different film, it illustrated an effective removal of diatom after etching, while X-ray diffraction pattern (XRD) showed a formation of ordered microstructure due to diatom as a template. Finally, the electrochemical performance of different film was tested, and the specific capacitances of PPy@CNT@diatom film electrode reached to 543 F g–1 at a current density of 0.5 A g–1, exhibiting an outstanding capacitance performance and practicality due to this unique microstructure, which improved the specific surface area of the film for charge storage and migration.