Article
Chemistry, Physical
Lili Liu, Yao Lu, Cong Ning, Na Li, Shouwen Chen, Zhaoxia Hu
Summary: Structure design plays a crucial role in preparing proton exchange membranes (PEMs) with excellent performance. In this study, a series of comb-shaped sulfonated fluorinated poly(aryl ether sulfone) (SPFAES) membranes were synthesized and demonstrated improved proton conductivity and physicochemical stability compared to linear SPFAE membranes. These findings offer a promising example for the synthesis of high-performance PEMs with flexible comb-shaped side chains.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Tao Wang, Si Li, Tanner Corrado, Lingyu Yang, Jennifer L. Schaefer, Ruilan Guo
Summary: A facile design of sulfonated poly(arylene ether sulfone) multi-block copolymer membranes with selectively cross-linked hydrophobic domains for proton exchange membranes was developed. The cross-linked membranes showed significantly improved dimensional stability and proton conductivity compared to the cross-linked random copolymers. The cross-linked multiblock copolymer membrane outperformed Nafion over the full relative humidity range at the highest ion exchange capacity level and the longest block length.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Zhuoyu Yin, Haobo Geng, Pengfei Yang, Benbing Shi, Chunyang Fan, Quan Peng, Hong Wu, Zhongyi Jiang
Summary: A sulfonated covalent organic framework nanosheets (TpPa-SO3H) were synthesized and incorporated into SPEEK matrix to prepare proton exchange membranes with increased ion exchange capacity and reduced swelling ratio. The SPEEK/TpPa-SO3H-5 membrane exhibited significantly improved proton conductivity and mechanical strength, leading to favorable performance in a single H-2/O-2 fuel cell.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Jingmei Xu, Lingxin Meng, Qingyuan Shi, Qiang Ren, Zhe Wang
Summary: In this study, sulfonated poly (ether ketone sulfone)s polymers with long sulfonic acid alkyl side chains and amino groups were successfully prepared and cross-linked membranes were obtained. These cross-linked composite membranes showed excellent properties, including good mechanical properties, methanol resistance and thermal stability. The water uptake, dimensional stability and proton conductivity of the membrane were effectively improved. Therefore, these long-side chains functionalized cross-linked sulfonated poly (ether ketone sulfone)s proton exchange membranes have potential applications in fuel cells.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Physical
Xue Li, Shubo Wang, Hong Zhang, Cheng Lin, Xiaofeng Xie, Chenxing Hu, Ran Tian
Summary: Copoly (arylene ether sulfone)s were used for proton exchange membrane preparation, achieving enhanced phase-separated morphology and favorable proton conductivity. The membranes exhibited higher water uptake and reasonably high proton conductivity, making them suitable for use in PEMFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Ji Eun Park, Junghwan Kim, Jusung Han, Kihyun Kim, SungBin Park, Sungjun Kim, Hyun S. Park, Yong-Hun Cho, Jong-Chan Lee, Yung-Eun Sung
Summary: The sulfonated poly(arylene ether sulfone) with a 50 mol.% degree of sulfonation, SPAES50, has been successfully synthesized for use in hydrocarbon-based membrane and ionomer applications in proton-exchange membrane water electrolysis (PEMWE). The SPAES50 membrane and the SPAES50-based ionomer (P50) were found to exhibit excellent physical and electrochemical properties, leading to higher performance in PEMWE compared to the commercial Nafion (TM) membrane and ionomer. This study demonstrates the great potential of SPAES50 as a hydrocarbon-based membrane and ionomer for PEMWE applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Yunji Xie, Anna Ringuette, Di Liu, Jinhui Pang, Hatice Mutlu, Dominik Voll, Patrick Theato
Summary: The effects of degree of branching and ion exchange capacity on the properties of sulfonated branched polymer proton exchange membranes (PEMs) were systematically compared. Increasing the degree of branching and ion exchange capacity improved water absorption, proton conductivity, single-cell performance, and distribution of hydrophilic phase, but reduced mechanical properties. Increasing the degree of branching also enhanced dimensional stability and oxidative stability, while the impact of ion exchange capacity was the opposite. The optimal polymer membrane had a degree of branching of 7.5% and ion exchange capacity of 1.94 meq g-1, exhibiting the highest proton conductivity and maximum power density, satisfactory dimensional change, and sufficient thermal, oxidative, and mechanical stability. This work serves as a guide for designing and synthesizing sulfonated branched polymer PEMs.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Pu Yangyang, Ning Cong, Lu Yao, Liu Lili, Li Na, Hu Zhaoxia, Chen Shouwen
Summary: The new blend and cross-linked proton exchange membrane exhibits excellent mechanical strength and improved physicochemical stability in dry state, achieved through good compatibility and dispersion between SPEEK and SPFAES, as well as rearrangement and cross-linking of polymer chains.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2021)
Article
Chemistry, Physical
Wenhao Li, Jingjing Jiang, Hongli An, Shu Dong, Zhouying Yue, Huidong Qian, Hui Yang
Summary: This study reports the preparation of self-crosslinked sulfonated poly(ether ether ketone) with pendant sulfoalkoxy side chains, which exhibit excellent proton conductivity and outperform traditional Nafion 212 in single cell performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Diao Yuan, Yajun Qin, Songsong Li, Shenghua Du, Yaoyao Xu, Qiang Weng, Pei Chen, Xinbing Chen, Zhongwei An
Summary: A novel monomer DFTMTE was synthesized and utilized to prepare densely sulfonated copolymer membranes with high ion exchange capacity and conductivity, exhibiting significantly improved performance compared to commercially available membranes, attributed to excellent microphase separation and quinoxaline-based crosslinking.
JOURNAL OF POWER SOURCES
(2021)
Article
Polymer Science
Zahra Esmaeilzadeh, Mohammad Karimi, Ahmad Mousavi Shoushtari, Mehran Javanbakht
Summary: This study successfully fabricated and characterized the SPEEK nanocomposite of polydopamine coated multi-walled carbon nanotube (P@MWCNT), showing improved dimensional stability and enhanced proton conductivity. Through innovative approach based on interfacial energies, it was found that increasing the interfacial energy between P@MWCNTs and polymer chains contributes to the transfer of protons along the interface region of nanofiller and matrix.
Article
Energy & Fuels
Khadijeh Hooshyari, Hamidreza Rezania, Vahid Vatanpour, Mohadese Rastgoo-Deylami, Hamid Reza Rajabi
Summary: This study focused on the synthesis of SPEKIS and preparation of new nanocomposite blend membranes using ZnS FQDs to enhance the proton conductivity and fuel cell performance of PBI membranes. The interactions between thiazole rings and functional groups of SPEKIS and ZnS FQDs, along with PBI groups, were shown to improve the proton conductivity. The best fuel cell performance was achieved with the SPEKIS/PBI/ZnS FQDs nanocomposite blend membranes, demonstrating promising potential for high-temperature fuel cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Polymer Science
Riddhi Kamble, Arijit Ghorai, Bholanath Ghanti, Debabrata Pradhan, Susanta Banerjee
Summary: A series of polymer-metal-organic frameworks (MOF) hybrid composite membranes were prepared and their properties were analyzed and compared. The results showed that incorporating MOF into the polymer matrix can significantly improve proton conductivity, water uptake, and swelling without affecting oxidative stability.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Natalia A. Agudelo, Claudia E. Echeverri-Cuartas, Betty L. Lopez
Summary: Composite polymeric membranes were prepared using sulfonated poly(ether ether sulfone) (sPEES) and functionalized mesostructured cellular foam (MCF) silica nanoparticles. The effects of polymer molecular weight, MCF silica functional group, and silica charge percentage on membrane properties were evaluated. The membrane prepared with low molecular weight polymer and 3% wt. of sulfonic group functionalized silica exhibited similar performance to Nafion (R) 117.
Article
Polymer Science
Hailin Yu, Yinghan Wang
Summary: Aldehyde terminated sulfonated poly (arylene ether sulfone) (SPAES-CHO) and SPAES-graft-SPVA (SPAES-g-SPVA) membranes were successfully prepared in this study, with the introduction of sulfonated poly (vinyl alcohol) (SPVA) resulting in significantly lower methanol permeability and higher proton selectivity.
HIGH PERFORMANCE POLYMERS
(2021)
