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He Y, An N, Meng C, Xiao L, Wei Q, Zhou Y, Yang Y, Li Z, Hu Z. COF-Based Electrodes with Vertically Supported Tentacle Array for Ultrahigh Stability Flexible Energy Storage. ACS APPLIED MATERIALS & INTERFACES 2022; 14:57328-57339. [PMID: 36525593 DOI: 10.1021/acsami.2c15092] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
As an emerging porous crystal polymer, covalent organic frameworks (COFs) possess unique characteristics, such as high porosity, excellent stability, diverse topologies, designable open channels, and functional tunability. However, limited by the solid powder form, most COFs display low active site utilization and weak binding force with the current collector. In this pioneering research, we integrate redox-active COFs onto carbon fiber surfaces (AC-COFs) via strong covalent bridging. The 2,6-diaminoanthraquinone (DAAQ) pillars embedded on the carbon fiber surface are the key to precisely controlling the growth direction of COFs. The obtained tentacle-like array vertically supported on the surface of the carbon fiber can effectively induce charge transfer and prevent COFs from aggregating/collapsing. The strong covalent coupling and increase of accessible active sites contributed to the high specific capacitance of AC-COFs electrode (1034 mF cm-2). In addition, the COF-based flexible electrode retains an initial capacitance of 98% after 20000 charge-discharge cycles. The flexible all-solid-state symmetric supercapacitor is assembled by PVA/H2SO4 gel electrolyte with an areal capacitance of 715 mF cm-2. Besides, a red LED can be easily powered by three-bending AC-COFs//AC-COFs devices. The innovative synthesis strategy opens up new opportunities to develop high-performance flexible energy storage devices based on COFs.
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Affiliation(s)
- Yuanyuan He
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ning An
- College of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
- ESNAC Co. Ltd, Qindao 266042, China
| | - Congcong Meng
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- School of Electronic and Information Engineering, Lanzhou City University, Lanzhou 730070, China
| | - Liangzhikun Xiao
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Qiaoqiao Wei
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yi Zhou
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yuying Yang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Zhimin Li
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Zhongai Hu
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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