Conjugated microporous polymers via a one-pot Buchwald-Hartwig/Suzuki-Miyaura double-coupling for high-performance
Xinzeyu Zhang1, Likuan Teng1, Jian Chen1
1State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Abstract:
Developing conjugated microporous polymers (CMPs) with enhanced redox activity and extended π-conjugation is essential for advancing high-performance supercapacitors with improved energy density and long-term stability. In this study, we developed a one-pot palladium-catalyzed Buchwald-Hartwig/Suzuki-Miyaura (BHSM) double-coupling strategy to synthesize CMPs (BHSM-CMPs) with high specific capacitance and excellent cycling stability. By employing triaminotriphenylamine, 3,6-dibromophenanthrene-9,10-dione and 3,5-dibromobenzeneboronic acid in various ratios, the BH coupling introduces redox-active amine nitrogen and anthraquinone units to enhance capacity, while the SM coupling forms CC bonds that extend π-conjugation. In a three-electrode configuration, BHSM-CMP-3 delivered a specific capacitance of 774 F g-1 (1 A g-1) and sustained 87 % of its initial value after 6000 cycles. Quasi-solid-state symmetric fiber-shaped supercapacitors (FSCs) were further fabricated via in-situ polymerization of BHSM-CMP-3 onto carbon nanotube fibers (CNFs), forming BHSM@CNFs for wearable electronics. The resulting BHSM@CNF FSCs achieved an areal specific capacitance of 598 mF cm-2, a high energy density of 41.6 μWh cm-2, and a maximum power density of 2.54 mW cm-2. This work presents a versatile synthetic strategy for producing high-performance CMPs, significantly expanding their potential in flexible and wearable energy storage applications.
