Construction of fully π-conjugated, diyne-linked conjugated microporous polymers based on tetraphenylethene and dibenzo[g,p]chrysene units for energy storage
Journal
Polymer Chemistry
Journal Volume
15
Journal Issue
28
Start Page
2827
End Page
2839
ISSN
1759-9954
1759-9962
Date Issued
2024
Author(s)
Mohamed Gamal Mohamed
Santosh U. Sharma
Pei-Tzu Wang
Mervat Ibrahim
Meng-Hao Lin
Mohsin Ejaz
Hung-Ju Yen
Shiao-Wei Kuo
Abstract
In recent years, the quest for efficient and durable electrode materials for supercapacitors has driven the development of novel conjugated microporous polymers (CMPs). This study presents the synthesis and comprehensive characterization of two novel π-conjugated diyne-linked CMPs, TPE-Diyne CMP and TBN-Diyne CMP, designed as electrode materials for supercapacitors. These Diyne-CMPs were synthesized via a palladium-catalyzed alkyne-alkyne coupling reaction in high yields. Spectroscopic analyses, including FTIR and NMR, confirmed the distinct chemical structures of TPE-Diyne and TBN-Diyne CMPs, highlighting the presence of aromatic and alkyne groups essential for their electrochemical properties. Thermogravimetric analysis (TGA) demonstrated their remarkable thermal stability up to 800 °C under N2. Furthermore, nitrogen adsorption-desorption measurements revealed high specific surface areas of 428 m2 g−1 for the TPE-Diyne CMP and 256 m2 g−1 for the TBN-Diyne CMP, with well-defined microporosity. Electrochemical performance tests showed that the TPE-Diyne CMP achieved a specific capacitance of 39 F g−1, a capacitance retention of 98% after 2000 charge-discharge cycles and an energy density of 3.82 Wh kg−1, indicating exceptional stability and energy storage capability. Meanwhile, the TBN-Diyne CMP exhibited a specific capacitance of 32.4 F g−1, a cycling stability of 92% and an energy density of 3 Wh kg−1. These results underscore the significance of TPE-Diyne and TBN-Diyne CMPs as innovative and highly effective electrode materials for next-generation supercapacitors, offering enhanced performance and stability. The findings contribute valuable insights into developing advanced materials for energy storage applications, addressing the growing demand for high-performance supercapacitors in various technological fields.
Publisher
Royal Society of Chemistry (RSC)
Type
journal article