Issue 21, 2024

A conjugated microporous polymer–graphene composite porous sandwich-like film for highly efficient flexible supercapacitors

Abstract

Fabrication of high-performance flexible solid-state supercapacitors (FSSCs) is significant for the booming development of flexible wearable electronic devices. Herein, we develop a novel porous sandwich-like film electrode material composed of rGO and conjugated microporous polymers (CMPs) to achieve FSSCs with high specific gravimetric capacitance and good rate performance by a simple vacuum filtration fabrication process coupled with a reduction process. The designed porous sandwich-like structure is beneficial for exposing more active sites, creating numerous ion transport channels, and enhancing the electron transport between rGO and CMPs. To overcome the poor processability of CMPs, we introduce a third monomer containing hydroxyl functional groups to synthesize a redox-active imine N-containing CMP (PTPAH) with high surface area via the one-step Buchwald–Hartwig (B–H) cross coupling reaction. The obtained porous sandwich-like composite film electrode of PTPAH and rGO (PTPAH@rGO) shows a high specific gravimetric capacitance (545 F g−1 at a current density of 1 A g−1) and good rate performance (450 F g−1 at a current density of 10 A g−1). PTPAH@rGO FSSCs fabricated with PVA/H2SO4 as a gel electrolyte demonstrate an excellent capacitance (220 F g−1) and a high power density (3345 W kg−1). This work offers a novel strategy to improve the dispersibility and processing performance of CMPs and provides a pathway to prepare CMP-based composite films as high-performance flexible electrodes, showing promising potential application as a next-generation power source.

Graphical abstract: A conjugated microporous polymer–graphene composite porous sandwich-like film for highly efficient flexible supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
08 Mar 2024
Accepted
24 Apr 2024
First published
24 Apr 2024

J. Mater. Chem. A, 2024,12, 12423-12434

A conjugated microporous polymer–graphene composite porous sandwich-like film for highly efficient flexible supercapacitors

L. Teng, J. Duan, H. Liu, X. Zhang, J. Li, Y. Li, J. Hong, W. Lyu and Y. Liao, J. Mater. Chem. A, 2024, 12, 12423 DOI: 10.1039/D4TA01603C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements