Article
Chemistry, Multidisciplinary
Xingyu Wu, Nanjun Chen, Chuan Hu, Harm-Anton Klok, Young Moo Lee, Xile Hu
Summary: A fluorination strategy is reported to create a phase-separated morphological structure in poly(aryl piperidinium) anion-exchange membranes (AEMs). The fluorinated AEMs possess high conductivity and dimensional stability, as well as excellent mechanical and chemical stability. AEMFCs using these fluorinated AEMs achieve outstanding peak power density and remain stable over extended operation.
ADVANCED MATERIALS
(2023)
Article
Electrochemistry
Simone Bonizzoni, Pietro Stilli, Felix Lohmann-Richters, Claudio Oldani, Chiara Ferrara, Antonio Papagni, Luca Beverina, Piercarlo Mustarelli
Summary: In this study, a facile and simple chemical modification of Aquivion (R) was reported, resulting in a chemically stable membrane with high ionic conductivity exceeding 2.5x10(-2) S cm(-1) at 80 degrees C and 100% RH, which was utilized in a polymer fuel cell.
Article
Polymer Science
Yu Wang, Yudong Wang, Sushant Sahu, August A. A. Gallo, Xiao-Dong Zhou
Summary: In this study, two Tetrakis(dialkylamino)phosphonium (TKDAAP) compounds with alkyne functionality were synthesized and incorporated into an azide-modified SBS triblock copolymer backbone via Cu(I)-catalyzed alkyne-azide cycloaddition (CuAAC) click chemistry. The resulting anion exchange membranes (AEMs) were characterized, and it was found that the triazole linker between the cation and the polymer backbone was stable under alkaline conditions. Varying the substituents of TKDAAP compounds could significantly alter the stability, and increasing the hydrophilicity of the AEM was an efficient way to enhance its ionic conductivity. Using clickable TKDAAP compounds allows for the easy combination of various cations into polymer backbones, potentially leading to an efficient way to screen high-performance AEM candidates.
Article
Polymer Science
Bercis Pektas, Gokhan Sagdic, Ozgun Daglar, Serter Luleburgaz, Ufuk Saim Gunay, Gurkan Hizal, Umit Tunca, Hakan Durmaz
Summary: In this study, a polythioether with double clickable alkyne groups was prepared using a rapid polymerization method and combined with CuAAC click reaction to construct new topological polymers. The synthesis and post-polymerization modification processes were shown to be rapid and efficient.
Article
Chemistry, Organic
Samantha Saxer, Omer Erdogan, Cedric Paniagua, Alain Chavanieu, Xavier Garric, Vincent Darcos
Summary: Protein-polymer bioconjugates show great potential in biomedical and life science applications, and a highly efficient, versatile, and facile chemical ligation reaction for the synthesis of macromolecules has been proposed in this article. Additionally, the aggregation behavior of amphiphilic graft copolymers based on poly(ethylene glycol) in water was investigated, and a new protein-polymer bioconjugate was prepared by copper-free click chemistry reaction using azido-functionalized polystyrene copolymers.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Andreas J. Butzelaar, Sven Schneider, Edgar Molle, Patrick Theato
Summary: This study demonstrated successful controlled cationic polymerization of vinyl ethers with pendant C=C double bonds and C triple bonds using a single-component initiation at ambient conditions, enabling the synthesis of unprecedented functional poly(vinyl ether)s through post-polymerization modifications such as thiol-ene/-yne and copper(I)-catalyzed alkyne-azide cycloaddition reactions.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Review
Polymer Science
Nanjun Chen, Young Moo Lee
Summary: Anion exchange membrane fuel cells (AEMFCs) are considered a low-cost alternative to proton exchange membrane fuel cells (PEMFCs) for clean energy conversion, as they utilize non-platinum group metals as electrocatalysts under alkaline conditions. The development of high-performance anion-exchange polyelectrolytes (AEPs) has led to significant progress in power density and durability of AEMFCs, making them comparable to or even better than PEMFCs.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ahmed Mohamed Ahmed Mahmoud, Kenji Miyatake
Summary: A series of anion exchange membranes (4-QPPAF-TMA) with high molecular weight and superior properties were prepared. These membranes exhibited high hydroxide ion conductivity, reasonable water absorbability, low to moderate dimensional swelling, and excellent alkaline stability. When used in a fuel cell with a non-PGM cathode catalyst, the membrane achieved a high peak power density.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Qiao Liu, Wenli Ma, Lin Tian, Junmin Li, Lincan Yang, Fanghui Wang, Zhiqian Wang, Jing Li, Zhongming Wang, Hong Zhu
Summary: In this study, a series of novel poly(biphenyl piperidinium) membranes with superior conductivity and stability were successfully synthesized by tethering cationic groups to the backbone utilizing flexible hydrophobic alkyl spacers with various lengths. The long-term alkali resistance of AEMs can be improved by extending the length of the flexible alkyl chains appropriately. These membranes exhibited excellent film-forming ability and tensile strength, well-defined microphase separation, and achieved high power density and low voltage decay rate in fuel cell applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Timon Novalin, Dong Pan, Goran Lindbergh, Carina Lagergren, Patric Jannasch, Rakel Wreland Lindstrom
Summary: This study synthesized a poly(p-terphenylene piperidinium)based membrane and ionomer for use in AEMFC, showing great potential with high water uptake capabilities. Comparison with a commercial Aemion T-polymer revealed the key property of higher water uptake in PAP-based ionomers for enhancing electrode performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Xingyu Wu, Nanjun Chen, Harm-Anton Klok, Young Moo Lee, Xile Hu
Summary: The research team has successfully prepared high-molecular-weight branched poly(aryl piperidinium) AEMs, which exhibit high OH- conductivity and dimensional stability. The optimized membrane b-PTP-2.5 performs well at 80 degrees Celsius, with high mechanical strength and alkaline stability, as well as achieving good peak power densities in both H-2-O-2 and H-2-air.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Chemical
Wei Yuan, Lingping Zeng, Shangkun Jiang, Caili Yuan, Qian He, Jianchuan Wang, Qiang Liao, Zidong Wei
Summary: Anion exchange membrane fuel cells (AEMFCs) have the advantage of low cost, but the use and commercialization of anion exchange membranes (AEMs) have always been challenging. This study successfully prepared AEMs and ionomers with non-rotatable rigid carbazole group and piperidinium group, and demonstrated their excellent performance in conductivity, mechanical strength, and stability. Moreover, the fuel cell based on these materials showed outstanding peak power density and long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Electrochemistry
Jiandang Xue, Junfeng Zhang, Xin Liu, Tong Huang, Haifei Jiang, Yan Yin, Yanzhou Qin, Michael D. Guiver
Summary: This review focuses on the recent advances in alkaline-stable AEM development, with a particular emphasis on the outstanding performance of cQA-based AEMs in alkaline stability. The classification of different types of cQAs and discussions on improving structural design for enhanced AEM stability are highlighted in the article.
ELECTROCHEMICAL ENERGY REVIEWS
(2022)
Article
Chemistry, Physical
Jia Hui Chen, Yvonne Shuen Lann Choo, Wei Ting Gao, Xue Lang Gao, Zhi Hong Cai, Jia Jun Wang, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu
Summary: In this study, Troger's base microporous anion exchange membranes (AEMs) with hyperbranched structure were prepared by superacid catalysis. The introduction of hyperbranched structure improved the water uptake and OH- transport of the AEMs, leading to enhanced performance in alkaline fuel cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zhixin Zhao, Minghua Zhang, Wenhao Du, Yafei Xiao, Zhaojie Yang, Dawei Dong, Xi Zhang, Minmin Fan
Summary: This study designed a series of homogeneous semi-interpenetrating network (semi-IPN) anion exchange membranes (AEMs) with improved ionic conductivity and chemical stability through the combination of a pure carbon copolymer backbone and a flexible cross-linking agent. The optimized AEM exhibited excellent hydroxide conductivity and long-term stability, making it suitable for anion exchange membrane fuel cells (AEMFCs).
ACS APPLIED MATERIALS & INTERFACES
(2022)