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Aziz A, Lotebulo Ndruru STC, Bundjali B, Wahyuningrum D, Arcana IM. Synthesis of Polymer Electrolyte Membranes from Sulfonated Poly(Arylene Ether Ketones) with Partial Substitution of Carboxylate Acid Group. ChemistrySelect 2022. [DOI: 10.1002/slct.202202583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Abdul Aziz
- Inorganic and Physical Chemistry Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha 10 Bandung 40132 Jawa Barat Indonesia
- Inorganic and Physical Chemistry Division Faculty of Mathematics and Natural Sciences Universitas Mulawarman Jalan Barong Tongkok Samarinda 75242 Kalimantan Timur Indonesia
| | - Sun Theo Constan Lotebulo Ndruru
- Research Center for Chemistry Research Organization for Nanotechnology and Materials National Research and Innovation Agency (BRIN) PUSPIPTEK Area Serpong Tangerang Selatan Banten 15314 Indonesia
| | - Bunbun Bundjali
- Inorganic and Physical Chemistry Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha 10 Bandung 40132 Jawa Barat Indonesia
| | - Deana Wahyuningrum
- Organic Chemistry Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha 10 Bandung 40132 Jawa Barat Indonesia
| | - I Made Arcana
- Inorganic and Physical Chemistry Division Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jalan Ganesha 10 Bandung 40132 Jawa Barat Indonesia
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Dombaycıoğlu Ş, Günsel H, Aydın AO. Nafion/Aquivion‐Based Composite Lithium Ion Exchange Membranes for High Capacity Li‐S Batteries. ChemistrySelect 2022. [DOI: 10.1002/slct.202202910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Şeyma Dombaycıoğlu
- Department of Chemistry Faculty of Science Sakarya University Sakarya Turkey
- Sakarya University Research Development and Application Center (SARGEM) Sakarya Turkey
| | - Hilal Günsel
- Department of Engineering Fundamental Sciences Faculty of Technology Sakarya University of Applied Sciences Sakarya Turkey
| | - Ali Osman Aydın
- Department of Basic Pharmaceutical Sciences School of Pharmacy Medipol University Istanbul Turkey
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Salmeron-Sanchez I, Asenjo-Pascual J, Avilés-Moreno JR, Ocón P. Microstructural description of ion exchange membranes: The effect of PPy-based modification. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Salmeron-Sanchez I, Asenjo-Pascual J, Avilés-Moreno J, Pérez-Flores J, Mauleón P, Ocón P. Chemical physics insight of PPy-based modified ion exchange membranes: A fundamental approach. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120020] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zheng J, Feng C, Ming P, Zhang C. Effect of Microstructural Damage on the Thermomechanical Properties of Electrodes in Proton Exchange Membrane Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2022; 14:2918-2929. [PMID: 34994531 DOI: 10.1021/acsami.1c21529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Advanced functional materials composed of multiple nanoscale phases, including pores and interfaces, have been extensively applied in the fields of new energy, architecture, and aerospace. However, insufficient knowledge of the thermomechanical properties resulting from material failures, such as interfacial delamination and porosity deformations, which limit the durability and lifetime of these materials, has hindered their further application, demanding a deeper understanding of microstructural changes. Based on the fuel cell electrode, we explore a multiscale prediction model that correlates the atomic interactions between interfaces with a microscopic thermomechanical model to illuminate the effects of interface binding characteristics on the materials' mechanical response and heat conduction mechanisms. Compared with experimental measurements and theoretical calculations at the macroscopic scale, our model excels in predicting the initiation and propagation of interfacial debonding and the thermal conductivity of the electrode, with the resistance factors for the interface, pores, and cracks taken into consideration. This work provides guidance for designing robust electrodes resistant to thermomechanical failure and serves as a reference method for predicting damage in heterogeneous porous materials.
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Affiliation(s)
- Jin Zheng
- College of Materials Science and Engineering, Shanghai Key Lab of Metal Functional Materials, Tongji University, Shanghai 201804, China
| | - Cong Feng
- College of Materials Science and Engineering, Shanghai Key Lab of Metal Functional Materials, Tongji University, Shanghai 201804, China
- Clean Energy Automotive Engineering Center, School of Automotive Studies, Tongji University, Shanghai 201804, China
| | - Pingwen Ming
- Clean Energy Automotive Engineering Center, School of Automotive Studies, Tongji University, Shanghai 201804, China
| | - Cunman Zhang
- Clean Energy Automotive Engineering Center, School of Automotive Studies, Tongji University, Shanghai 201804, China
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Pham TA, Koo S, Park H, Luong QT, Kwon OJ, Jang S, Kim SM, Kim K. Investigation on the Microscopic/Macroscopic Mechanical Properties of a Thermally Annealed Nafion ® Membrane. Polymers (Basel) 2021; 13:4018. [PMID: 34833318 PMCID: PMC8620802 DOI: 10.3390/polym13224018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 11/17/2022] Open
Abstract
The Nafion® electrolyte membrane, which provides a proton pathway, is an essential element in fuel cell systems. Thermal treatment without additional additives is widely used to modify the mechanical properties of the membrane, to construct reliable and durable electrolyte membranes in the fuel cell. We measured the microscopic mechanical properties of thermally annealed membranes using atomic force microscopy with the two-point method. Furthermore, the macroscopic property was investigated through tensile tests. The microscopic modulus exceeded the macroscopic modulus over all annealing temperature ranges. Additionally, the measured microscopic modulus increased rapidly near 150 °C and was saturated over that temperature, whereas the macroscopic modulus continuously increased until 250 °C. This mismatched micro/macroscopic reinforcement trend indicates that the internal reinforcement of the clusters is induced first until 150 °C. In contrast, the reinforcement among the clusters, which requires more thermal energy, probably progresses even at a temperature of 250 °C. The results showed that the annealing process is effective for the surface smoothing and leveling of the Nafion® membrane until 200 °C.
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Affiliation(s)
- Tuyet Anh Pham
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Korea; (T.A.P.); (S.K.); (H.P.)
| | - Seunghoe Koo
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Korea; (T.A.P.); (S.K.); (H.P.)
| | - Hyunseok Park
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Korea; (T.A.P.); (S.K.); (H.P.)
| | - Quang Thien Luong
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Korea; (Q.T.L.); (O.J.K.)
| | - Oh Joong Kwon
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Korea; (Q.T.L.); (O.J.K.)
| | - Segeun Jang
- School of Mechanical Engineering, Kookmin University, Seoul 02707, Korea;
| | - Sang Moon Kim
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Korea; (T.A.P.); (S.K.); (H.P.)
| | - Kyeongtae Kim
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Korea; (T.A.P.); (S.K.); (H.P.)
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Ahn CY, Park JE, Kim S, Kim OH, Hwang W, Her M, Kang SY, Park S, Kwon OJ, Park HS, Cho YH, Sung YE. Differences in the Electrochemical Performance of Pt-Based Catalysts Used for Polymer Electrolyte Membrane Fuel Cells in Liquid Half- and Full-Cells. Chem Rev 2021; 121:15075-15140. [PMID: 34677946 DOI: 10.1021/acs.chemrev.0c01337] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A substantial amount of research effort has been directed toward the development of Pt-based catalysts with higher performance and durability than conventional polycrystalline Pt nanoparticles to achieve high-power and innovative energy conversion systems. Currently, attention has been paid toward expanding the electrochemically active surface area (ECSA) of catalysts and increase their intrinsic activity in the oxygen reduction reaction (ORR). However, despite innumerable efforts having been carried out to explore this possibility, most of these achievements have focused on the rotating disk electrode (RDE) in half-cells, and relatively few results have been adaptable to membrane electrode assemblies (MEAs) in full-cells, which is the actual operating condition of fuel cells. Thus, it is uncertain whether these advanced catalysts can be used as a substitute in practical fuel cell applications, and an improvement in the catalytic performance in real-life fuel cells is still necessary. Therefore, from a more practical and industrial point of view, the goal of this review is to compare the ORR catalyst performance and durability in half- and full-cells, providing a differentiated approach to the durability concerns in half- and full-cells, and share new perspectives for strategic designs used to induce additional performance in full-cell devices.
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Affiliation(s)
- Chi-Yeong Ahn
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Ji Eun Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Sungjun Kim
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Ok-Hee Kim
- Department of Science, Republic of Korea Naval Academy, Jinhae-gu, Changwon 51704, South Korea
| | - Wonchan Hwang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Min Her
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Sun Young Kang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - SungBin Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Oh Joong Kwon
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, South Korea
| | - Hyun S Park
- Center for Hydrogen-Fuel Cell Research, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Yong-Hun Cho
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,Department of Chemical Engineering, Kangwon National University, Samcheok 25913, South Korea
| | - Yung-Eun Sung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, South Korea.,School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
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Effects of Impurities on Pre-Doped and Post-Doped Membranes for High Temperature PEM Fuel Cell Stacks. ENERGIES 2021. [DOI: 10.3390/en14112994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, we experimentally investigated two high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) stacks for their response to the presence of reformate impurities in an anode gas stream. The investigation was aimed at characterizing the effects of reformate impurities at the stack level, including in humidified conditions and identifying fault features for diagnosis purposes. Two HT-PEMFC stacks of 37 cells each with active areas of 165 cm2 were used with one stack containing a pre-doped membrane with a woven gas diffusion layer (GDL) and the other containing a post-doped membrane with non-woven GDL. Polarization curves and galvanostatic electrochemical impedance spectroscopy (EIS) were used for characterization. We found that both N2 dilution and impurities in the anode feed affected mainly the charge transfer losses, especially on the anode side. We also found that humidification alleviated the poisoning effects of the impurities in the stack with pre-doped membrane electrode assemblies (MEA) and woven GDL but had detrimental effects on the stack with post-doped MEAs and non-woven GDL. We demonstrated that pure and dry hydrogen operation at the end of the tests resulted in significant recovery of the performance losses due to impurities for both stacks even after the humidified reformate operation. This implies that there was only limited acid loss during the test period of around 150 h for each stack.
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Choi JS, Tsui JH, Xu F, Lee SH, Lee HJ, Wang C, Kim HJ, Kim DH. Fabrication of nanomolded Nafion thin films with tunable mechanical and electrical properties using thermal evaporation-induced capillary force lithography. ADVANCED MATERIALS INTERFACES 2021; 8:2002005. [PMID: 33996383 PMCID: PMC8115721 DOI: 10.1002/admi.202002005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Indexed: 06/12/2023]
Abstract
In this paper, we report a simple and facile method to fabricate nanomolded Nafion thin films with tunable mechanical, and electrical properties. To achieve this, we combine a novel thermal evaporation-induced capillary force lithography method with swelling process to obtain enhanced pattern fidelity in nanomolded Nafion films. We demonstrate that structural fidelity and mechanical properties of patterned Nafion thin films can be modulated by changing fabrication parameters such as swelling time, Nafion polymer concentration, and curing temperature. Interestingly, we also find that impedance properties of nanomolded Nafion thin films are associated with the Nafion polymer concentration and curing temperature. In particular, 20% Nafion thin films exhibit greater impedance stability and lower impedance values than 5% Nafion thin films at lower frequencies. Moreover, curing temperature-specific impedance changes are observed. These results suggest that capillary lithography can be used to fabricate Nafion nanostructures with high pattern fidelity capable of modifying mechanical and electrical properties of Nafion thin films.
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Affiliation(s)
- Jong Seob Choi
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States
| | - Jonathan H Tsui
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States
| | - Fei Xu
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States
| | - Su Han Lee
- Digital Healthcare Research Center, Gumi Electronics and Information Technology Research Institute (GERI), 350-27, Gumidaero, Gumi, Gyeongbuk 39253, Republic of Korea
| | - Heon Joon Lee
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States
| | - Chao Wang
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States
| | - Hyung Jin Kim
- Digital Healthcare Research Center, Gumi Electronics and Information Technology Research Institute (GERI), 350-27, Gumidaero, Gumi, Gyeongbuk 39253, Republic of Korea
| | - Deok-Ho Kim
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, 21205, United States; Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, United States; Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, United States
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