Design and Synthesis of Bisulfone-Linked Two-Dimensional Conjugated Microporous Polymers for CO2 Adsorption and Energy Storage

Abstract

We have successfully synthesized two types of two-dimensional conjugated microporous polymers (CMPs), Py-BSU and TBN-BSU CMPs, by using the Sonogashira cross-coupling reaction of BSU-Br2 (2,8-Dibromothianthrene-5,5′,10,10′-Tetraoxide) with Py-T (1,3,6,8-Tetraethynylpyrene) and TBN-T (2,7,10,15-Tetraethynyldibenzo[g,p]chrysene), respectively. We characterized the chemical structure, morphology, physical properties, and potential applications of these materials using various analytical instruments. Both Py-BSU and TBN-BSU CMPs showed high thermal stability with thermal decomposition temperatures (Td10) up to 371 °C and char yields close to 48 wt%, as determined by thermogravimetric analysis (TGA). TBN-BSU CMPs exhibited a higher specific surface area and porosity of 391 m2 g−1 and 0.30 cm3 g−1, respectively, due to their large micropore and mesopore structure. These CMPs with extended π-conjugated frameworks and high surface areas are promising organic electroactive materials that can be used as electrode materials for supercapacitors (SCs) and gas adsorption. Our experimental results demonstrated that the TBN-BSU CMP electrode had better electrochemical characteristics with a longer discharge time course and a specific capacitance of 70 F g−1. Additionally, the electrode exhibited an excellent capacitance retention rate of 99.9% in the 2000-cycle stability test. The CO2 uptake capacity of TBN-BSU CMP and Py-BSU CMP were 1.60 and 1.45 mmol g−1, respectively, at 298 K and 1 bar. These results indicate that the BSU-based CMPs synthesized in this study have potential applications in electrical testing and CO2 capture.

Rational Design of Ultrastable Conjugated Microporous Polymers Based on Pyrene and Perylene Units as High-Performance Organic Electrode Materials for Supercapacitor Applications

“…In an ideal scenario, we should prioritize using healthier and more sustainable resources to meet the growing energy demand. Energy storage plays a vital role in realizing the full potential of green and renewable energy sources such as solar, wind, and biomass. ,− Among the various energy storage technologies available, rechargeable electrochemical energy storage stands out as a promising option due to its high efficiency, especially for larger smart-grid energy storage systems (ESSs). , …”

Rationally Engineered Ultrastable Three-Dimensional (3D) Conjugated Microporous Polymers Containing Triptycene, Tetraphenylethene, and Benzothiadiazole Units as Exceptional High-Performance Organic Electrodes for Supercapacitors

“…Its electron-rich cavity bestows upon it a unique chemical architecture, endowing it with host–guest interactions, responsiveness to stimuli, and the capacity for self-assembly. On the other hand, combined with the flexibility of monomers in POPs, the three-dimensional property of triptycene is well designed as a building unit. − For example, Ghanem et al published the first POP containing triptycene unit, and then, a series of triptycene-based POPs were reported in recent years. Benefiting from the extensive functional sites, Fang et al synthesized a 3D stp-topologized COFs with a porphyrin or metalloporphyrin building unit .…”

Pyrene-based covalent organic polymers with nano carbonaceous composites for efficient supercapacitive energy storage

“…[13][14][15][16][17][18][19][20] COPs can also be synthesized in a variety of ways, including through the polymerization of small molecules or through selfassembly of pre-formed building blocks. [21][22][23][24][25] Some potential applications of COPs include gas storage materials for hydrogen and carbon dioxide, [26][27][28] heterogeneous catalysts for organic reactions, [29][30][31] and electrode materials for supercapacitors and battery devices. [32][33][34][35] Supercapacitors (SCs), in particular, have emerged as potential electrochemical energy storage systems and have gained popularity due to their outstanding high-power density, quick charge/discharge processes, exceptional stability, and environmental friendliness.…”