journal article·2025-11-03

Functional Ion-Sieving Separators Based on Covalent Organic Frameworks toward Stable Aqueous Energy Storage and Conversion

Zhendong Hao, Jiadong Tang, Shihai Cao, Wenyao Zhang, Huimin Yin, Wenjie Li, Yuxue Fu, Yinghao Li, Qianqian Zhang, Min Zheng, Yuntong Sun, Jong-Min Lee

ACS Materials Letters· Volume 7· Issue 11
Publisher page

Abstract

Aqueous energy storage and conversion systems (AESCS) offer a cost-effective and safe alternative to conventional energy storage technologies. Among their key components, separators with high ionic selectivity are crucial for maximizing the energy output and ensuring long-term stability. Covalent organic frameworks, a class of nanoporous materials with tunable functional groups, are promising candidates for AESCS. Herein, we design and synthesize TP-4KT, which is coated onto a commercial glass fiber separator (TP-4KT@GF) to realize ion selectivity. The performance of TP-4KT@GF is evaluated in two representative AESCS: concentration cells and aqueous zinc-ion batteries (AZIBs). The modified separator achieves a high cation transference number (0.71) and a power density of 33.18 W m –2 in concentration cells, while effectively suppressing dendrite formation and improving electrochemical stability in AZIBs. This study provides valuable insights into the development of functional ion-sieving separators for next-generation energy storage and conversion technologies.
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Research context

OpenAlex topics: Advanced battery technologies research · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering

Nanjing Institute of Technology

College of Materials Science and Engineering

Beijing University of Technology

School of Environmental Engineering

Key Laboratory for Soft Chemistry and Functional Materials, School of Chemistry and Chemical Engineering

Nanjing University of Science and Technology

School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore

School of Civil and Environmental Engineering

University of Technology Sydney

Department of Energy Science and Engineering

Daegu Gyeongbuk Institute of Science and Technology (DGIST)

Energy Science and Engineering Research Center

Funding

Natural Science Foundation of Jiangsu Province · Nanjing Institute of Technology · Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China · Beijing Nova Program

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