Article
Biochemistry & Molecular Biology
Ji Won Heo, Liangliang An, Min Soo Kim, Duck Hyun Youn, Yong Sik Kim
Summary: A novel zwitterion-substituted lignin (ZL) was synthesized and used to fabricate proton exchange membranes. The incorporation of ZL into Nafion membranes improved their ion exchange capacity, thermal stability, and hydrophilicity. The zwitterionic moieties of ZL enhanced proton transport ability, and ZL also improved the chemical durability and oxidation stability of Nafion membranes, showing potential for fuel cell applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Hejin Huang, Zhen Cao, Karim R. Gadelrab, Jonathan P. Mailoa, Alfredo Alexander-Katz
Summary: Nafion, a commonly used material for PEFC, faces dehydration and dimensional instability issues in high-temperature, low-humidity environments. This paper proposes a potential solution by introducing nanoscale confinements to Nafion chains. It is found that dual chemistry confinement, consisting of both hydrophobic and hydrophilic confinements, can improve water absorption behavior and reduce dimensional instability of the Nafion membrane.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Chemical
Kotaro Wakimoto, Wei-Wei Yan, Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: NH3 can be produced as an eco-friendly energy source below 250 degrees C through low-temperature active catalysts, and the use of fluorinated sulfonic acid polymer/ceramic composite membranes can enhance NH3 permeance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Guoliang Chen, Lei Ge, Joong Hee Lee, Zhonghua Zhu, Hao Wang
Summary: This review summarizes the materials and engineering strategies for designing PCP-based high-temperature proton exchange composite membranes, and discusses the remaining challenges as well as future research areas.
Article
Polymer Science
Osung Kwon, Jaehyoung Park, Jihoon Lee
Summary: Understanding the ionic structure and charge transport on proton exchange membranes (PEMs) is crucial for their characterization and development. Electrostatic force microscopy (EFM) is an effective tool for studying the ionic structure and charge transport on PEMs. In this study, a mathematical approximation model was derived and used to quantitatively analyze recast Nafion and silica-Nafion composite membranes.
Article
Chemistry, Physical
Fatima C. Teixeira, Ana de Sa, Antonio P. S. Teixeira, V. M. Ortiz-Martinez, A. Ortiz, I Ortiz, C. M. Rangel
Summary: The study focused on the development of new Nafion membranes by incorporating aryl- or azaheteroaromatic bisphosphonate compounds as dopants, resulting in enhanced proton conductivity properties compared to commercial Nafion membranes. These doped membranes showed improved performance in fuel cells at different temperatures, with a maximum power output of around 383 mW cm(-2) at 70 degrees C. The membranes also demonstrated potential advantages in restricting gas crossover, as indicated by higher open circuit potentials compared to Nafion membranes under the same conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Tushar Kanti Maiti, Jitendra Singh, Subrata Kumar Maiti, Jagannath Majhi, Arihant Ahuja, Manjinder Singh, Anasuya Bandyopadhyay, Gaurav Manik, Sujay Chattopadhyay
Summary: In this study, the introduction of sulfonic acid functionalized graphene oxide (SGO) into Perfluorosulfonic acid (PFSA) membranes improved the glass transition temperature (Tg), mechanical properties, proton conductivity, and single-cell performance. The loading of SGO increased the Tg and modulus of PFSA composite membranes, leading to enhanced proton conductivity and fuel cell performance.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Fatima C. Teixeira, Antonio P. S. Teixeira, C. M. Rangel
Summary: In this study, new doped Nafion membranes were prepared by casting with AzBPs as dopants. The proton conduction properties of the modified membranes were significantly improved compared to the reference Nafion membrane. The membrane with AzBP1 as dopant showed the best proton conductivity.
Article
Engineering, Environmental
Y. Prykhodko, K. Fatyeyeva, L. Hespel, S. Marais
Summary: Over 50% of energy is currently produced by burning non-renewable fossil fuels, leading to the release of greenhouse gases and environmental pollution. As a result, research on renewable energy sources, storage, and energy transformation devices has become increasingly important in recent years. Fuel cells, particularly proton exchange membrane fuel cells, are considered a promising energy device with ongoing developments in membrane technology.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Yeon Jung Oh, Su Kyung Kang, Ah Hyun Lee, Sanha Park, Sejin Kim, Jungkyu Choi, Pyung Soo Lee
Summary: MFI membranes were synthesized using composite seeds consisting of zeolite nanocrystals and amorphous silica nanoparticles. The addition of silica nanoparticles to the seed layer effectively reduced non-zeolite defects in the MFI membranes. The zeolite membrane prepared from a seed layer with 75% zeolite and 25% silica particles exhibited the highest N2/SF6 gas selectivity and N2 gas permeance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Joana F. M. Sousa, Joao Pina, Carla Gomes, Lucas D. Dias, Mariette M. Pereira, Dina Murtinho, Paula Dias, Joao Azevedo, Adelio Mendes, J. Sergio Seixas de Melo, Alberto A. C. C. Pais, Marta Pineiro, Artur J. M. Valente
Summary: The development of efficient and reliable membranes for redox flow batteries (RFBs) with high ionic conductivity and selectivity is challenging. By synthesizing porphyrin-containing SPEEK composite membranes, the performance of RFBs can be improved, showing high protonic conductivity and selectivity. The addition of porphyrins at different concentrations enhances proton channels and thermal stability, although high concentrations lead to porphyrin aggregates.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
De Ao, Zibo Yang, Zhihua Qiao, Yuxiu Sun, Zhengqing Zhang, Michael D. Guiver, Chongli Zhong
Summary: A self-supported MOF crystal-glass composite (CGC) membrane was prepared by melt quenching ZIF-62 and ZIF-8 mixture. The membrane exhibited improved gas permeance and selectivity due to its unique structure. The thickness of the membrane can be adjusted without the need of a support substrate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Yanan Liu, Marc-Olivier Coppens, Zhongyi Jiang
Summary: The review discusses the concept and applications of mixed dimensional membranes (MDMs), which are fabricated by integrating nanomaterials of different dimensionality and chemistry with 2D materials. It stimulates different conceptual thinking about designing advanced membranes from the angle of dimensions and final structures.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Lun Shu, Yuan Peng, Rui Yao, Hongling Song, Chenyu Zhu, Weishen Yang
Summary: A facile strategy has been developed to construct defect-free and flexible metal-organic framework (MOF)-based membranes with high selectivity. The fabricated soft-solid MOF composite membranes showed excellent separation performance for H-2/CO2 separation. This study demonstrates the potential of MOF-based membranes in practical separation applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Materials Science, Multidisciplinary
Anastasiia Gafiullina, Bradley P. Ladewig, Jinju Zhang
Summary: This article summarizes the importance of stimuli-responsive materials in the field of gas separation, discusses the synthesis and application of photoresponsive organic polymeric membranes, inorganic metal-organic framework thin films, and inorganic-organic mixed-matrix membranes, and reviews the development of photoresponsive gas separation membrane testing cells and proposes a third generation testing system to highlight test accuracy.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Guangyuan Yang, Fuwei Liu, Ning Hou, Sanwen Peng, Chunqing He, Pengfei Fang
Summary: Uniform polyaniline (PANI) nanotubes synthesized by self-assembly method show excellent anticorrosion performance on carbon steel compared to aggregated PANI obtained by conventional polymerization method.
Article
Energy & Fuels
Hongfei Pan, Meiling Fan, Guoliang Liu, Sixiu Zeng, Rui Wang, Haining Zhang
Summary: Multicomponent transition-metal sulfide, such as Ni,Co-S, is a promising electrode material for pseudocapacitors due to its excellent conductivity and high capacitance. In this study, diverse morphologies of Ni,Co-S materials were prepared by hydrothermal method with different ratios of Ni, Co, and thiourea. The Ni,Co-S with a precursor mass ratio of 1:2:2 showed the optimum capacitance performance. The assembled asymmetric supercapacitor using Ni,Co-S and NPHTCK as bipolar exhibited a high energy density of 44.7 Wh·kg-1 at a power density of 800 W·kg-1.
Article
Chemistry, Physical
Meiling Fan, Peipei Liu, Yapeng Cheng, Haolin Tang, Bing Jin, Haining Zhang
Summary: In this work, catalyst with simultaneously engineered Fe-N4 and Co-N4 active sites and graphitic carbon multilayer-encapsulated FeCo alloy is developed, showing promising catalytic activity and good stability for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Duxin Zhang, Meilin Fan, Shifeng Tan, Hongfei Pan, Wenmao Tu, Haining Zhang, Yadong Wang
Summary: The SiO(x)/C composite, as a silicon-based material, is a promising alternative anode for next-generation lithium-ion batteries. The porous SiO0.71C1.95N0.47 anode material with robust Si-O skeletons wrapped by carbon layers exhibits excellent initial capacity, coulombic efficiency, and cycle life.
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
Xu Li, Libing Qian, Lei Liu, Zhe Liu, Haoliang Zhang, Lan Yang, Dongwei Zhang, Zhiyuan Chen, Pengfei Fang, Chunqing He
Summary: Buffer layers of TiO2 nanoparticles on the surface of MIL-101-Cr were added to improve the performance of MOFs/Nafion proton exchanging membranes. Nafion composite membranes doped with TiO2@MIL-101-Cr were fabricated. The water uptake of the composite membranes increased while their swelling ratios decreased compared to pristine Nafion. The introduction of TiO2@MIL-101-Cr facilitated water diffusion and overall hydration of the composite membranes, resulting in a significant increase in proton conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Zhen Huang, Jinshuai Zhang, Zheng Wang, Xiangyang Peng, Jiapeng Fang, Chunqing He, Pengfei Fang
Summary: In this study, functional graphene oxide (f-GO) nanosheets were used to enhance the NO2 resistibility of room-temperature-vulcanized (RTV) silicone rubber. An accelerated aging experiment was conducted to simulate the aging process of nitric oxide on a silicone rubber composite coating, and the penetration of conductive medium was tested using electrochemical impedance spectroscopy (EIS). The composite silicone rubber sample with 0.3 wt.% filler content showed significantly higher impedance modulus and lower porosity compared to pure RTV, indicating superior resistance to NO2 aging.
Article
Chemistry, Physical
Siqi Fang, Guoliang Liu, Minghai Li, Haining Zhang, Jun Yu, Fangfang Zhang, Mu Pan, Haolin Tang
Summary: This study shows that the performance of PEMFC can be greatly improved by using a highly oxygen-permeable perfluoronated ionomer containing dioxole segments as the catalyst binder in the cathode catalyst layer, leading to an increased peak power density of 100 mW cm-2. Molecular dynamics simulation results indicate that the designed ionomer has higher diffusion coefficient and higher oxygen solubility compared with Nafion.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shuohao Wu, Mengjun Wu, Haining Zhang, Haolin Tang
Summary: In this study, a single-ion-conducting gel polymer electrolyte (GPE) was proposed using lithiated Nafion (Li-Nafion) and polyacrylonitrile (PAN) polymers. The interaction between C N groups and Li+ was found to facilitate fast Li+ transport and reduce the Li+ migration barrier. The designed GPE exhibited a high lithium-ion transference number of 0.93, an admirable ionic conductivity of 1.93 x 10(-4) S cm(-1), and a wide electrochemical stability window up to 5.0 V at 30 degrees C. Further validation demonstrated a decent cycling performance and high capacity retention in a Li|LiFePO4 cell.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Environmental
Shengqiu Zhao, Yucong Liao, Rui Wang, Guoliang Liu, Haining Zhang, Haolin Tang
Summary: Using tea polyphenol-modified CeO2 nanoparticles in proton exchange membrane fuel cells can improve membrane performance and oxidation resistance, mitigating degradation and Ce migration issues.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shilong Suo, Wenmei Ma, Siyi Zhang, Ziwu Han, Yumin Wang, Yuanyuan Li, Yi Xiong, Yong Liu, Chunqing He, Pengfei Fang
Summary: In this study, a magnetic recyclable Z-scheme ZnO/ZnFe2O4 heterojunction was successfully constructed as an efficient photocatalyst for the green degradation of tetracycline hydrochloride. It exhibited excellent visible light absorption performance, efficient charge separation, and strong redox ability, resulting in high degradation efficiency and superior stability.
Article
Chemistry, Inorganic & Nuclear
Si Chen, Haoliang Zhang, Xu Li, Yong Liu, Mingyi Zhang, Xiangyang Gao, Xin Chang, Xiangjun Pu, Chunqing He
Summary: In this work, π-π coupling conductive bismuth-catecholate nanobelts with tunable lengths were successfully synthesized and their length-dependent electrochemical properties were investigated. The nanobelts possessed appropriate porosity, numerous redox active sites and good electrical conductivity. As negative electrodes for supercapacitors, they exhibited high specific capacitance and good cycling stability. This study provides insights for the development of negative electrode materials with promising electrochemical performance using newly designed π-π coupling conductive coordination frameworks.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Siwei Pan, Yuanyuan Li, Yaohong Zhao, Qing Wang, Qing Hu, Yihua Qian, Chunqing He
Summary: In a high-moisture environment, a superhydrophobic modified fluorosilicone coating was developed to enhance the stability of power equipment. An orthogonal experiment was conducted to assess the impact of coating surface tension on the water-oil interfacial properties. The results demonstrated that selecting the appropriate base resin and functional additives can effectively reduce the surface tension of the coating.
Article
Chemistry, Physical
Xiangyang Peng, Jinshuai Zhang, Jiapeng Fang, Zheng Wang, Zhen Huang, Shilong Kuang, Chunqing He
Summary: The aging process and water permeability of a surface-functional titanium dioxide nanosheet (f-TNS) composited room-temperature-vulcanized silicone rubber (RTV) composite coating were studied. The results showed that the composite with an appropriate proportion of f-TNS exhibited improved water permeability and resistance to NO2 corrosion.
Article
Materials Science, Multidisciplinary
Xiangyun Tan, Li Wang, Xi Chen, Haoliang Zhang, Si Chen, Libing Qian, Zhiyuan Chen, Chunqing He
Summary: The combination of 2D Bi2Se3 nanosheets and 1D MoO3 nanobelts in a heterojunction composite showed remarkable enhancement in gas sensing performance. The composite exhibited a high response and selectivity to TEA, as well as long-term stability and a low detection limit.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)