Article
Engineering, Chemical
Andrit Allushi, Thanh Huong Pham, Patric Jannasch
Summary: This study focused on developing anion exchange membranes (AEMs) with high alkaline stability and hydroxide conductivity by functionalizing fluorene units with dual pairs of quaternary piperidinium cations. The AEMs with bisPip side chains demonstrated superior conductivity and alkaline stability compared to AEMs with monoPip cations per fluorene unit, highlighting the advantage of locally concentrating the cations in the polymer structure.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Balakondareddy Sana, Anupam Das, Tushar Jana
Summary: The development of efficient alkaline anion exchange membranes (AAEMs) is important. Cross-linking the polybenzimidazole chains (PyPBI) can improve the physical properties of the polymer, especially the hydroxide ion conductivity, alkaline stability, and mechanical stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Zhengwang Tao, Chenyi Wang, Xiaoyan Zhao, Jian Li, Michael D. Guiver
Summary: Solid alkaline fuel cells with anion exchange membranes (AEMs) have been a focus in renewable energy cells due to their high electrode activity, potential for non-precious metal catalysts, and lower fuel purity requirements. The past decade has seen significant progress in AEM designs, with various cationic structures being explored, though challenges remain in improving hydroxide conductivity and durability. Future research directions include addressing these challenges.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Tong Huang, Junfeng Zhang, Xin Liu, Jiandang Xue, Haifei Jiang, Yanxiong Ren, Xiaoyu Qiu, Yan Yin, Zhongyi Jiang, Michael D. Guiver
Summary: The study introduces a novel anion conducting membrane using QTP-HCP-NS for the first time, demonstrating improved ion conductivity and mechanical properties compared to traditional membranes. The composite AEMs exhibit lower dimensional swelling, higher tensile strength, and significantly enhanced ion conductivity, thanks to the unique properties of QTP-HCP-NS. However, aggregation and interfacial defects at high loadings of QTP-HCP-NS may lead to a reduction in ion conduction and mechanical strength.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Applied
Shujun Zhao, Wen-Chin Tsen, Chunli Gong
Summary: In this study, a composite anion exchange membrane was prepared to enhance the ion conductivity and stability of the membrane through structural design and material synthesis. The membrane exhibited superior performance, laying a foundation for applications in fuel cells and other fields.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Jinming Ge, Taipu Chen, Xiaofeng Wan, Lingfeng Lu, Ziqiang Liu, Shucheng Sun, Yuanqin Zhu
Summary: This study designed and synthesized an aromatic monomer-based anion exchange membrane with bulky aryl unit and symmetric dibrominated branches. The membrane, prepared via superacid-catalyzed polyhydroxyalkylation and Menshutkin reactions, showed high hydroxide conductivity and dimensional stability. It also exhibited high alkaline stability and achieved a peak power density of 407.8 mW cm(-2) in H-2-O-2 fuel cells. This work provides insights into the development of high-performance next-generation anion exchange membranes.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Dong Pan, Joel S. Olsson, Patric Jannasch
Summary: Anion exchange membranes (AEMs) functionalized with alicyclic quaternary ammonium cations demonstrate high alkaline stability, thermal stability, mechanical properties, and high conductivity. AEMs prepared with certain cations showed excellent alkaline stability and conductivity, making them suitable for applications in fuel cells and water electrolyzers.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Juanjuan Han, Yangyang Zhang, Xiumeng Zheng, Yuyang Lu, Wanting Li, Xiaorong Zhou, Zhandong Ren, Yi Liu, Meixue Hu, Li Xiao, Lin Zhuang
Summary: A series of cross-linked AEMs with rigid and flexible backbones are synthesized, which exhibit enhanced mechanical properties, impressive ionic conductivity, and excellent chemical stability. Specifically, c-DQPPO/PVA-7.5 shows outstanding wet-state tensile strength and elongation at break, as well as a peak power density in a fuel cell.
Article
Chemistry, Physical
Juanjuan Han, Chifeng Liu, Cuiwen Deng, Yangyang Zhang, Wenfeng Song, Xiumeng Zheng, Xia Liu, Yanmin Zhang, Xiaohong Yang, Zhandong Ren, Meixue Hu, Li Xiao, Lin Zhuang
Summary: By combining flexible and rigid polymer components, optimizing ion exchange capacity and hydrophilic/hydrophobic phase separation, SIPN AEMs with excellent mechanical properties, ion conductivity and chemical stability can be prepared.
JOURNAL OF POWER SOURCES
(2022)
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)
Review
Chemistry, Multidisciplinary
Jinsheng Li, Changpeng Liu, Junjie Ge, Wei Xing, Jianbing Zhu
Summary: Alkaline hydrogen-electricity energy conversion technologies, such as AEMFCs and AEMWEs, offer advantages over acidic counterparts, but face challenges in terms of AEM properties. This review examines the main obstacles of AEMs, including ion conductivity, stability, and device integration, and proposes strategies to address these challenges. The insights provided by this review can accelerate the commercialization of these promising hydrogen-electric energy conversion technologies.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Review
Polymer Science
Asep Muhamad Samsudin, Merit Bodner, Viktor Hacker
Summary: This review provides recent studies on Poly(vinyl alcohol) (PVA)-based membranes as alternative anion exchange membranes for alkaline fuel cells. It discusses the development of anion exchange membranes in general and highlights the performances and characteristics of recently reported PVA-based membranes. Furthermore, it discusses challenging issues and perspectives for future study of anion exchange membranes.
Article
Chemistry, Physical
Zhuoyu Yin, Yingzhen Wu, Benbing Shi, Chao Yang, Yan Kong, Yiqin Liu, Hong Wu, Zhongyi Jiang
Summary: A study was conducted on an alkaline stable polymer membrane, aiming to improve its stability through modifications in the polymer backbone, cationic groups, and linkage structure. The membrane exhibited good hydroxide conductivity and tensile strength under high alkaline conditions and maintained a high level of performance after long-term immersion.
SOLID STATE IONICS
(2022)
Article
Chemistry, Physical
Keiichiro Maegawa, Kazuhiro Hikima, Wai Kian Tan, Go Kawamura, Hiroyuki Muto, Atsushi Nagai, Andrei Jitianu, Atsunori Matsuda
Summary: Novel hydroxide ion-conductive composite membranes were fabricated by incorporating coprecipitation-synthesized magnesium-aluminum-type layered double hydroxides into a potassium hydroxide-doped polybenzimidazole membrane. The addition of LDH improved the water affinity of the membranes and resulted in high hydroxide ion conductivity and reduced humidity dependence, ultimately leading to improved performance in alkaline fuel cells.
SOLID STATE IONICS
(2022)
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
Materials Science, Composites
Fuqiang Hu, Fei Zhong, Sheng Wen, Genwen Zheng, Chunli Gong, Caiqin Qin, Hai Liu
POLYMER COMPOSITES
(2020)
Article
Materials Science, Multidisciplinary
Fuqiang Hu, Fei Zhong, Jie Wang, Ting Qu, Jing Ni, Genwen Zheng, Chunli Gong, Hai Liu
Summary: New metal-organic framework based hybrid materials were designed and prepared by hybridizing boron phosphate with HKUST-1 precursor, leading to improved properties in proton exchange membranes. The effective interactions between hybrid materials and polymer matrix resulted in enhanced mechanical and thermal stability, as well as proton conductivity. These findings suggest promising application potential in modification of proton exchange membranes.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Silong Wu, Xiaohong Feng, Fei Zhong, Bingqing Zhang, Jie Wang, Ting Qu, Jing Ni, Hai Liu, Chunli Gong, Fuqiang Hu
Summary: In this study, carbon nanotubes are coated with SiO2 using sol-gel method and further modified chemically to improve the performance of membranes. The resulting composite membranes show enhanced thermal stability, mechanical stability, methanol resistance, and electrochemical performance compared to pure chitosan membranes.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Materials Science, Composites
Xiaohong Feng, Jie Wang, Hai Liu, Chunli Gong, Fan Cheng, Jing Ni, Fuqiang Hu
Summary: Metal-organic frameworks (MOFs) are the most fascinating conductive materials due to their designable structure and pores at the molecular level. This study demonstrates that hybridizing MOFs with special micro/nano-structured materials can effectively improve the properties of the materials. The hybrid membranes showed improved performances in terms of tensile strength, thermal stability, fuel resistance ability, conduction, and single cell performances, indicating the great potential of MOFs-based hybrid materials in fabricating high-performance composite proton exchange membranes.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Fuqiang Hu, Tsen Wen-Chin, Fei Zhong, Bingqing Zhang, Jie Wang, Hai Liu, Genwen Zheng, Chunli Gong, Sheng Wen
NEW JOURNAL OF CHEMISTRY
(2020)