Article
Nanoscience & Nanotechnology
Liliana N. Trevani, Cristian M. O. Lepori, Yamila Garro Linck, Gustavo A. Monti, Graciela C. Abuin, Fabian Vaca Chavez, Horacio R. Corti
Summary: The coordination of Si and P in mesoporous silica is affected by temperature and pore size, with high pore size leading to higher electrical conductivity and release rate of PA when exposed to water.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Physical
Mohammad Bagher Karimi, Khadijeh Hooshyari, Parisa Salarizadeh, Hossein Beydaghi, V. M. Ortiz-Martinez, A. Ortiz, I. Ortiz Uribe, Fereidoon Mohammadi
Summary: This study aims to assess the proton conductivities of different proton exchange membranes and provide upper bounds for anhydrous fuel cells and high-temperature applications. Comparison of data shows that while some poly (ionic liquids) offer the highest proton conductivities, aromatic polymers like PBI are more suitable for anhydrous conditions and high temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Xiaowei Wu, Ziya Liu, Hu Guo, You-Lee Hong, Bingqing Xu, Kun Zhang, Yusuke Nishiyama, Wei Jiang, Satoshi Horike, Susumu Kitagawa, Gen Zhang
Summary: By utilizing a host-guest supramolecular chemistry-induced strategy, hydrogen bond networks were successfully assembled along the nanochannels of COFs, enabling efficient anhydrous proton transfer. This work demonstrates the great advantage of COFs serving as a supramolecular host for ions in the solid state.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Zhun Li, Zhifu Guan, Chunyang Wang, Bo Quan, Lianhua Zhao
Summary: The research showed that sHMO composite membrane has lower IL retention capacity but still contributes to the conductivity of the membrane, providing the possibility for the use of anhydrous composite membrane in PEMFCs under medium temperature condition.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Neil Robinson, Eric F. May, Michael L. Johns
Summary: Solid-fluid interactions are crucial for porous materials in various chemical processes, but the opaque nature of these systems hinders detailed characterization of interfacial phenomena. A low-magnetic-field two-dimensional H-1 nuclear spin relaxation measurement provides insights into adsorbate identity and interfacial dynamics, showcasing distinct relaxation responses correlated with adsorbate acidity. This approach offers a molecular-level perspective on interactions within optically opaque porous media.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Osung Kwon, Kwangjin Oh, JaeHyoung Park, Sam Park, Tae Gwan Lee, Byungrak Son
Summary: This study investigated the proton conductivity enhancement mechanism of Nafion-silica sulfuric acid (SSA) composite membranes using atomic force microscopy. It was found that among different weight percentages of SSA, 1 wt% SSA exhibited the highest proton conductivity and thermal properties, attributed to the separation of the hydrophilic ionic channel network and hydrophobic backbone in the microstructural morphology.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Shubo Wang, Yuan Lin, Jian Yang, Lei Shi, Guang Yang, Xupin Zhuang, Zhenhuan Li
Summary: Composite PEMs with blend nanofibers of cellulose and UiO-66-NH2 embedded in sulfonated polysulfone matrix show high proton conductivity, low methanol permeability, and low swelling ratio. They have great potential for use as proton-conducting nanofillers in fuel cell PEMs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Wenjie Wang, Guitian Tai, Yixuan Li, Junqi Sun
Summary: Highly elastic, healable, and durable electrolyte membranes named PU-IL-MX have been developed by complexing poly(urea-urethane), ionic liquids, and MXene nanosheets. The membranes exhibit a tensile strength of approximately 3.86 MPa, a strain at break of approximately 281.89%, and can conduct protons under anhydrous, high-temperature conditions. The PU-IL-MX membranes also demonstrate excellent IL retention properties and can retain their weight and proton conductivity even under highly humid conditions.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Energy & Fuels
Aijing Zhang, Shengjuan Jiang, Xuefei Shan, Jia Wang, Mingzheng Zhou, Maorong Chai
Summary: A new, simple strategy for synthesizing hollow mesoporous silica (HMS) has been developed through OH- ion exchange-induced etching of mesoporous silica, resulting in a gradient distribution of OH- ions close to the core. Microscopy confirmed the success of the ion exchange-induced etching process in mesoporous silica microspheres. Proton conductivity of the phosphoric acid-impregnated HMS membrane at 180 degrees C under anhydrous conditions was found to be 0.025 S.cm(-1), demonstrating the potential for high temperature proton exchange membrane fuel cell applications.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Gen Huang, Yingying Li, Shiqian Du, Yujie Wu, Ru Chen, Jin Zhang, Yi Cheng, Shanfu Lu, Li Tao, Shuangyin Wang
Summary: The CNT@SiO2-Pt cathode demonstrates superior power density and stability, effectively addressing phosphate poisoning issue and providing a new path for the commercialization of HT-PEMFCs.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xiaoyu Meng, Chunjuan Li, Jihong Wen, Haimu Ye, Chuanbo Cong, Qiong Zhou, Lixin Xu
Summary: Incorporating phosphotungstic acid into sulfonated poly(ether ether ketone) using surface-modified silica nanoparticles improved proton conductivity in the composite membrane. The composite membrane showed excellent proton conductivity and stability due to increased dispersion of the nanoparticles.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Sacha Fop, Riccardo Vivani, Silvia Masci, Mario Casciola, Anna Donnadio
Summary: A new crystalline metal acid triphosphate, ZrH5(PO4)(3) (ZP3), has been discovered with record-high proton conductivity of 0.5-3.1x10(-2) S cm(-1) in the range 25-110 degrees C in anhydrous conditions. ZP3 achieves superprotonic conductivity through extended defective frustrated hydrogen bond chains, where protons are dynamically disordered over two oxygen centers. The high proton conductivity and stability in anhydrous conditions make ZP3 an excellent candidate for innovative applications in fuel cells and other energy technologies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Hongyun Tan, Shengqiu Zhao, S. Eltahir Ali, Shuhong Zheng, Abdullah K. Alanazi, Rui Wang, Haining Zhang, Hala M. Abo-Dief, Ben Bin Xu, Hassan Algadi, Handong Li, Priyanka Wasnik, Zhanhu Guo, Haolin Tang
Summary: In this study, polymer membranes with varying chain lengths were prepared by introducing sulfonimide group and trifluoromethanesulfonate acid (TFSA) ionic liquids to the perfluorosulfonic acid (PFSA) side chain. This dual proton-conducting structure extended the length of the hydrophilic side chain and enhanced the hydrophobic-hydrophilic phase separation, aiding in the formation of proton transport channels. The resulting membranes exhibited high proton conductivity and improved power density under low humidity conditions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Alekha Tyagi, Yaswanth K. Penke, Prerna Sinha, Iram Malik, Kamal K. Kar, Janakarajan Ramkumar, Hiroyuki Yokoi
Summary: The Al-substituted MnFe2O4-based ternary oxide and reduced graphene oxide (MAF-RGO) nanocomposite synthesized through in-situ co-precipitation and hydrothermal methods shows excellent ORR electrocatalytic performance in alkaline electrolyte. MAF-RGO demonstrates high ORR onset potential and good stability, indicating its potential as a high-performance ORR-active system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Takahisa Omata, Aman Sharma, Issei Suzuki, Tomohiro Ishiyama, Shinji Kohara, Koji Ohara, Madoka Ono, Yang Ren, Khurelbaatar Zagarzusem, Masaya Fujioka, Gaoyang Zhao, Junji Nishii
Summary: Anhydrous silicophosphoric acid glass exhibited high viscosity at high temperatures, displayed proton conduction, but had lower conductivity.
