Article
Polymer Science
Masa Hren, Damjan Makuc, Janez Plavec, Michaela Roschger, Viktor Hacker, Bostjan Genorio, Mojca Bozic, Selestina Gorgieva
Summary: In this work, fully polysaccharide based membranes were prepared for anion exchange membrane fuel cells (AEMFCs). Cellulose nanofibrils (CNFs) were successfully modified with an organosilane reagent to create quaternized CNFs (CNF (D)). The composite membranes of chitosan (CS) and CNF/CNF(D) showed improved mechanical properties, thermal stability, ionic conductivity, and power density compared to commercial membranes, demonstrating their potential for DEFC applications.
Article
Chemistry, Physical
Santosh Adhikari, Daniel P. Leonard, Katie H. Lim, Eun Joo Park, Cy Fujimoto, Oscar Morales-Collazo, Joan F. Brennecke, Zhendong Hu, Hongfei Jia, Yu Seung Kim
Summary: This study reports quaternized poly(fluorene) ionomers with controlled hydrophobicity and explores their applications in fuel cells. The results demonstrate the potential advantages of hydrophobic ionomers in improving water management, enhancing durability, and achieving higher performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Michelle Lehmann, Daniel Leonard, Jackie Zheng, Lilin He, Xiaomin Tang, Xi Chelsea Chen, Katie Heeyum Lim, Sandip Maurya, Yu Seung Kim, Tomonori Saito
Summary: A series of quaternized polynorbornene random copolymers were synthesized via vinyl addition polymerization, and the impact of polymer composition on their properties was elucidated. The quaternary ammonium alkyl tether length and the ratio of n-hexylnorbornene to unsubstituted norbornene were tailored to control the copolymer properties. The study provides important insight into design parameters for quaternized polynorbornenes.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Sairung Changkhamchom, Pongthorn Kunanupatham, Katesara Phasuksom, Anuvat Sirivat
Summary: Quaternized polybenzimidazole (Q-PBI) and quaternized graphene oxide (Q-GO) were successfully functionalized and embedded as AEM in this study, showing high hydroxide conductivity and low glucose permeability. The composites have potential applications in the field of glucose fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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)
Review
Biochemistry & Molecular Biology
Vijayalekshmi Vijayakumar, Sang Yong Nam
Summary: Chitosan-based biodegradable anion exchange membranes show great potential for fuel cell applications due to their conductivity and stability advantages, providing an environmentally friendly alternative to expensive and environmentally unfriendly membrane materials like Nafion.
Article
Polymer Science
Yu Ma, Lulu Wang, Ruijiang Feng, Jilin Wang, Tianzhou Cai
Summary: In this study, a novel composite membrane (QCS-IRMOF-3) was prepared by attaching IRMOF-3 with a free amino group to a quaternized chitosan by chemical cross-linking. The composite membrane's mechanical properties, swelling properties, ion exchange capacity, hydroxide conductivity, and chemical stability were investigated, where it was found that the membrane doped with 15 wt% IRMOF-3 crystals exhibited the best overall performance, making it promising for application in alkaline polymer electrolyte fuel cells.
Article
Engineering, Chemical
Kyu Ha Lee, Ji Young Chu, Ae Rhan Kim, Hwan Gyu Kim, Dong Jin Yoo
Summary: The study fabricated QPAEK/f-TiO2 composite membranes with varying contents of f-TiO2, and characterized their structure using different techniques. The addition of f-TiO2 enlarged the ion cluster and increased ion conductivity, with the maximum ion domain size and conductivity observed at 5wt% filler content.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Physical
Jiangshan Gao, Xiaokun Dong, Qingbin Tian, Yan He
Summary: This review summarizes recent progress and developments on per-fluorinated and non-fluorinated membranes with carbon nanotubes (CNTs) as reinforced fillers in various key areas. The topics reviewed include the correlation between the mechanical stability, thermal stability, water retention capacity, and proton conductivity of different membranes with different functionalized CNTs. In addition, it presents the preparation strategies of membrane matrix and CNTs filler, as well as the reinforced mechanism of CNTs in the membrane. Furthermore, the impact of interactions between CNTs and various types of PEM is discussed to provide a deeper perspective. Finally, the strategy for improving the performance of PEM and the challenges of CNTs-based membranes are analyzed for prospects.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Hae Min Kim, Chuan Hu, Ho Hyun Wang, Jong Hyeong Park, Nanjun Chen, Young Moo Lee
Summary: This study reports the use of side-chain-type s-PDTP copolymers as ionomers and membranes for anion exchange membrane fuel cells (AEMFCs). These copolymers exhibit high alkaline stability, excellent micromorphology, and high OH- conductivity. The ionomers with moderate ion-exchange-capacity and rational water uptake show optimal AEMFC performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Ning Wang, Tingting Zuo, Ke Liu, Jing Jia, Di Song, Xiaoqing Wei, Shu Hu, Quantong Che
Summary: This study successfully constructed an anion exchange membrane based on quaternized poly(phenylene) oxide with enhanced hydroxide conductivity stability through the introduction of ionic liquid-modified carbon nanomaterials. The prepared membranes exhibited enhanced hydroxide conductivity stability and excellent mechanical property in alkaline solution.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Nanjun Chen, Chuan Hu, Ho Hyun Wang, Jong Hyeong Park, Hae Min Kim, Young Moo Lee
Summary: The in-situ styrene-crosslinked c-PAP (x-PAP-PS) membranes exhibit high ion conductivity, mechanical strength, and durability, maintaining stability under harsh conditions. These membranes show improved water retention capacity at low relative humidity and achieve high power densities in AEMFCs.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Masa Hren, Michaela Roschger, Viktor Hacker, Bostjan Genorio, Darinka Fakin, Selestina Gorgieva
Summary: The addition of cellulose nanofibrils and quaternized cellulose nanofibrils can significantly enhance the performance of polysaccharide anion exchange membranes, including mechanical properties and ionic conductivity, leading to excellent performance in alkaline direct ethanol fuel cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Jiefeng Pan, Yanyao Tao, Lei Zhao, Xiaohong Yu, Xueting Zhao, Tao Wu, Lifen Liu
Summary: By utilizing a one-pot ultraviolet induced polymerization route to prepare quaternized imidazole-based anion exchange membranes, researchers were able to optimize membrane performance and achieve reliable mechanical properties and good electrochemical properties. The best-performing membrane exhibited a resistance of 1.86 omega.cm2 and a desalination ratio of 99%, surpassing a commercial anion exchange membrane. Moreover, all membranes showed a reaction mass efficiency above 94%, indicating high raw material utilization, low energy consumption, and environmental friendliness.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Junfeng Zhang, Weikang Zhu, Tong Huang, Chenyang Zheng, Yabiao Pei, Guoqiang Shen, Zixi Nie, Di Xiao, Yan Yin, Michael D. Guiver
Summary: The performance of anion exchange membrane fuel cells has significantly improved in the last decade, now comparable with proton exchange membrane fuel cells. Issues in the catalyst layer play important roles in performance, and the anion exchange ionomer is crucial in maximizing the utilization of electrocatalyst and fuel/oxygen transfer process.