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Du W, Liu L, Yin L, Li B, Ma Y, Guo X, Zang HY, Zhang N, Zhu G. Ultrathin Free-Standing Porous Aromatic Framework Membranes for Efficient Anion Transport. Angew Chem Int Ed Engl 2024; 63:e202402943. [PMID: 38529715 DOI: 10.1002/anie.202402943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/10/2024] [Accepted: 03/25/2024] [Indexed: 03/27/2024]
Abstract
Porous aromatic frameworks (PAFs) show promising potential in anionic conduction due to their high stability and customizable functionality. However, the insolubility of most PAFs presents a significant challenge in their processing into membranes and subsequent applications. In this study, continuous PAF membranes with adjustable thickness were successfully created using liquid-solid interfacial polymerization. The rigid backbone and the stable C-C coupling endow PAF membrane with superior chemical and dimensional stabilities over most conventional polymer membranes. Different quaternary ammonium functionalities were anchored to the backbone through flexible alkyl chains with tunable length. The optimal PAF membrane exhibited an OH- conductivity of 356.6 mS ⋅ cm-1 at 80 °C and 98 % relative humidity. Additionally, the PAF membrane exhibited outstanding alkaline stability, retaining 95 % of its OH- conductivity after 1000 hours in 1 M NaOH. To the best of our knowledge, this is the first application of PAF materials in anion exchange membranes, achieving the highest OH- conductivity and exceptional chemical/dimensional stability. This work provides the possibility for the potential of PAF materials in anionic conductive membranes.
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Affiliation(s)
- Wenguang Du
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Lin Liu
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Liying Yin
- School of Chemistry and Life Science, Changchun University of Technology, Changchun, 130012, P. R. China
| | - Bo Li
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Yu Ma
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Xiaoyu Guo
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Hong-Ying Zang
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Ning Zhang
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Guangshan Zhu
- Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
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2
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Lim H, Han GH, Lee DH, Shin G, Choi J, Ahn SH, Park T. Fluorine-Containing Poly(Fluorene)-Based Anion Exchange Membrane with High Hydroxide Conductivity and Physicochemical Stability for Water Electrolysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2400031. [PMID: 38497894 DOI: 10.1002/smll.202400031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/17/2024] [Indexed: 03/19/2024]
Abstract
Improving the hydroxide conductivity and dimensional stability of anion exchange membranes (AEMs) while retaining their high alkaline stability is necessary to realize the commercialization of AEM water electrolysis (AEMWE). A strategy for improving the hydroxide conductivity and dimensional stability of AEMs by inserting fluorine atoms in the core structure of the backbone is reported, which not only reduces the glass transition temperature of the polymer due to steric strain, but also induces distinct phase separation by inducing polarity discrimination to facilitate the formation of ion transport channels. The resulting PFPFTP-QA AEM with fluorine into the core structure shows high hydroxide conductivity (>159 mS cm-1 at 80 °C), favorable dimensional stability (>25% at 80 °C), and excellent alkaline stability for 1000 h in 2 m KOH solution at 80 °C. Moreover, the PFPFTP-QA is used to construct an AEMWE cell with a platinum group metal (PGM)-free NiFe anode, which exhibits the current density of 6.86 A cm-2 at 1.9 V at 80 °C, the highest performance in Pt/C cathode and PGM-free anode reports so far and operates stably for over 100 h at a constant current of 0.5 A cm-2 .
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Affiliation(s)
- Haeryang Lim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Gyeong Ho Han
- School of Chemical Engineering and Material Science, Chung-Ang University, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Dae Hwan Lee
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Giwon Shin
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Jinhyuk Choi
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Sang Hyun Ahn
- School of Chemical Engineering and Material Science, Chung-Ang University, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Taiho Park
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
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Xu J, Mu J, Yao Y, Xu Y, Liao J, Ruan H, Shen J. Ion Resource Recovery via Electrodialysis Fabricated with Poly(Arylene Ether Sulfone)-Based Anion Exchange Membrane in Organic Solvent System. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306313. [PMID: 37948422 DOI: 10.1002/smll.202306313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/28/2023] [Indexed: 11/12/2023]
Abstract
Ion resource recovery from organic wastewater is beneficial for achieving emission peaks and carbon neutrality targets. Advanced organic solvent-resistant anion exchange membranes (AEMs) for treating organic wastewater via electrodialysis (ED) are of significant interest. Herein, a kind of 3D network AEM based on poly(arylene ether sulfone) cross-linked with a flexible cross-linker (DBH) for ion resource recovery via ED in organic solvent system is reported. Investigations demonstrate that the as-prepared AEMs show excellent dimensional stability in 60% DMSO (aq.), 60% ethanol (aq.), and 60% acetone (aq.), respectively. For example, the optimized AEM shows very low swelling ratios of 1.04-1.10% in the organic solvents. ED desalination ratio can reach 99.1% after exposure of the AEM to organic solvents for 30 days, and remain > 99% in a mixture solution containing organic solvents and 0.5 m NaCl. Additionally, at a current density of 2.5 mA cm-2, the optimized AEM soaked in organic solvents for 30 days shows a high perm-selectivity (Cl-/SO4 2-) of 133.09 (vs 13.11, Neosepta ACS). The superior ED performance is attributed to the stable continuous sub-nanochannels within AEM confirmed by SAXS, rotational energy barriers, etc. This work shows the potential application of cross-linked AEMs for resource recovery in organic wastewater.
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Affiliation(s)
- Jingwen Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Junjie Mu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yuyang Yao
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yanqing Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Junbin Liao
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Huimin Ruan
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jiangnan Shen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
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Kong Y, Lyu B, Fan C, Yang Y, Wang X, Shi B, Jiang J, Wu H, Jiang Z. Manipulation of Cationic Group Density in Covalent Organic Framework Membranes for Efficient Anion Transport. J Am Chem Soc 2023; 145:27984-27992. [PMID: 38100046 DOI: 10.1021/jacs.3c07958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Anion exchange membranes with high anion conductivity are highly desired for electrochemical applications. Increasing ion exchange capacity is a straightforward approach to enhancing anion conductivity but faces a challenge in dimensional stability. Herein, we report the design and preparation of three kinds of isoreticular covalent organic framework (COF) membranes bearing tunable quaternary ammonium group densities as anion conductors. Therein, the cationic groups are integrated into the backbones by flexible ether-bonded alkyl side chains. The highly quaternary ammonium-group-functionalized building units endow COF membranes with abundant cationic groups homogeneously distributed in the ordered channels. The flexible side chains alleviate electrostatic repulsion and steric hindrance caused by large cationic groups, ensuring a tight interlayer stacking and multiple interactions. As a result, our COF membranes achieve a high ion exchange capacity and exceptional dimensional stability simultaneously. Furthermore, the effect of the ionic group density on the ion conductivity in rigid COF channels is systematically explored. Experiments and simulations reveal that the ionic group concentration and side chain mobility jointly determine the ion transport behavior, resulting in the abnormal phenomenon that the anion conductivity is not positively correlated to the ionic group density. The optimal COF membrane achieves the ever-reported highest hydroxide ion conductivity over 300 mS cm-1 at 80 °C and 100% RH. This study offers insightful guidelines on the rational design and preparation of high-performance anion conductors.
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Affiliation(s)
- Yan Kong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Bohui Lyu
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore
| | - Chunyang Fan
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Yi Yang
- College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaoyao Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Benbing Shi
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Jianwen Jiang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore
| | - Hong Wu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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Zeng M, He X, Wen J, Zhang G, Zhang H, Feng H, Qian Y, Li M. N-Methylquinuclidinium-Based Anion Exchange Membrane with Ultrahigh Alkaline Stability. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306675. [PMID: 37548334 DOI: 10.1002/adma.202306675] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 07/31/2023] [Indexed: 08/08/2023]
Abstract
Anion-exchange-membrane (AEM) water electrolysis is a promising technology for hydrogen production from renewable energy sources. However, the bottleneck of its development is the poor comprehensive performance of AEM, especially the stability at highly concentrated alkaline condition and temperature. Herein, a new cationic group N-methylquinuclidinium with enhanced alkaline stability is proposed and hereby a full-carbon chain poly(aryl quinuclidinium) AEM is prepared. Compared with reported AEMs, it shows ultrahigh comprehensive alkaline stability (no chemical decomposition, no decay of conductivity) in 10 m NaOH aqueous solution at 80 °C for more than 1800 h, excellent dimensional stability (swelling ratio: <10% in pure water, <2% in 10 m NaOH) in OH- form at 80 °C, high OH- conductivity (≈139.1 mS cm-1 at 80 °C), and high mechanical properties (tensile strength: 41.5 MPa, elongation at break: 50%). The water electrolyzer using the AEM exhibits a high current density (1.94 A cm-2 at 2.0 V) when assembled with nickel-alloy foam electrodes, and high durability when assembled with nickel foam electrodes.
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Affiliation(s)
- Mengying Zeng
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Xianying He
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Ju Wen
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Ganbing Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Hongbo Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Hanhua Feng
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Yu Qian
- School of Materials Science and Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Ming Li
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
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Song W, Zhang X, Yang C, Yang Z, Wu L, Ge X, Xu T. Alkaline Membranes toward Electrochemical Energy Devices: Recent Development and Future Perspectives. ACS CENTRAL SCIENCE 2023; 9:1538-1557. [PMID: 37637731 PMCID: PMC10450879 DOI: 10.1021/acscentsci.3c00597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Indexed: 08/29/2023]
Abstract
Anion-exchange membranes (AEMs) that can selectively transport OH-, namely, alkaline membranes, are becoming increasingly crucial in a variety of electrochemical energy devices. Understanding the membrane design approaches can help to break through the constraints of undesired performance and lab-scale production. In this Outlook, the research progress of alkaline membranes in terms of backbone structures, synthesis methods, and related applications is organized and discussed. The evaluation of synthesis methods and description of membrane stability enhancement strategies provide valuable insights for structural design. Finally, to accelerate the deployment of relevant technologies in alkaline media, the future priority of alkaline membranes that needs to be addressed is presented from the perspective of science and engineering.
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Affiliation(s)
- Wanjie Song
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Xin Zhang
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Cui Yang
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Zhengjin Yang
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Liang Wu
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Xiaolin Ge
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
| | - Tongwen Xu
- Key
Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation
Centre of Chemistry for Energy Materials, School of Chemistry and
Material Science, University of Science
and Technology of China, Hefei 230026, P.R. China
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