High-Performance Supercapacitor Electrodes Prepared From Dispersions of Tetrabenzonaphthalene-Based Conjugated Microporous Polymers and Carbon Nanotubes
Maha Mohamed Samy, Mohamed Gamal Mohamed, Ahmed F. M. EL‐Mahdy, Tharwat Hassan Mansoure, Kevin C.‐W. Wu, Shiao‐Wei Kuo
Abstract
In this study, we prepared a series of conjugated microporous polymers (CMPs) through Sonogashira–Hagihara cross-couplings of a tetrabenzonaphthalene (TBN) monomer with pyrene (Py), tetraphenylethylene (TPE), and carbazole (Car) units and examined their chemical structures, thermal stabilities, morphologies, crystallinities, and porosities. TBN–TPE-CMP possessed a high surface area (1150 m2 g–1) and thermal stability (Td10 = 505 °C; char yield = 68 wt %) superior to those of TBN–Py-CMP and TBN–Car-CMP. To improve the conductivity of the TBN-CMP materials, we blended them with highly conductive single-walled carbon nanotubes (SWCNTs). Electrochemical measurements revealed that the TBN–Py-CMP/SWCNT nanocomposite had high capacitance (430 F g–1) at a current density of 0.5 A g–1 and outstanding capacitance retention (99.18%) over 2000 cycles; these characteristics were superior to those of the TBN–TPE-CMP/SWCNT and TBN–Car-CMP/SWCNT nanocomposites.