Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System
Various polybenzimidazole (PBI)-based ion-exchange films were prepared and thoroughly characterized by Fourier transform infrared (FT-IR) spectroscopy, proton conductivity, and water uptake for possible use as fuel cell membranes. Upon the increase in the flexibility of the PBI-based polymer films (...
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-03-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/7/3/1721 |
| _version_ | 1798040755828162560 |
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| author | Kyungho Hwang Jun-Hyun Kim Sung-Yul Kim Hongsik Byun |
| author_facet | Kyungho Hwang Jun-Hyun Kim Sung-Yul Kim Hongsik Byun |
| author_sort | Kyungho Hwang |
| collection | DOAJ |
| description | Various polybenzimidazole (PBI)-based ion-exchange films were prepared and thoroughly characterized by Fourier transform infrared (FT-IR) spectroscopy, proton conductivity, and water uptake for possible use as fuel cell membranes. Upon the increase in the flexibility of the PBI-based polymer films (e.g., poly(oxyphenylene benzimidazole) (OPBI) and sulfonated OPBI (s-OPBI)), the membranes exhibited slightly improved proton conductivity, but significantly increased dimensional changes. To reduce the dimensional changes (i.e., increase the stability), the cross-linking of the polymer films (e.g., cross-linked OPBI (c-OPBI) and sulfonated c-OPBI (sc-OPBI)) was accomplished using phosphoric acid. Interestingly, the sc-OPBI membrane possessed a greatly increased proton conductivity (0.082 S/cm), which is comparable to that of the commercially available Nafion membrane (0.09 S/cm), while still maintaining slightly better properties regarding the dimensional change and water uptake than those of the Nafion membrane. |
| first_indexed | 2024-04-11T22:11:57Z |
| format | Article |
| id | doaj.art-aee68c7633c546ac80e1450e750efc3e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:11:57Z |
| publishDate | 2014-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-aee68c7633c546ac80e1450e750efc3e2022-12-22T04:00:32ZengMDPI AGEnergies1996-10732014-03-01731721173210.3390/en7031721en7031721Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell SystemKyungho Hwang0Jun-Hyun Kim1Sung-Yul Kim2Hongsik Byun3Department of Chemical System Engineering, Keimyung University, Daegu 704-701, KoreaDepartment of Chemistry, Illinois State University, Normal, IL 61790, USADepartment of Energy Engineering, Keimyung University, Daegu 704-701, KoreaDepartment of Chemical System Engineering, Keimyung University, Daegu 704-701, KoreaVarious polybenzimidazole (PBI)-based ion-exchange films were prepared and thoroughly characterized by Fourier transform infrared (FT-IR) spectroscopy, proton conductivity, and water uptake for possible use as fuel cell membranes. Upon the increase in the flexibility of the PBI-based polymer films (e.g., poly(oxyphenylene benzimidazole) (OPBI) and sulfonated OPBI (s-OPBI)), the membranes exhibited slightly improved proton conductivity, but significantly increased dimensional changes. To reduce the dimensional changes (i.e., increase the stability), the cross-linking of the polymer films (e.g., cross-linked OPBI (c-OPBI) and sulfonated c-OPBI (sc-OPBI)) was accomplished using phosphoric acid. Interestingly, the sc-OPBI membrane possessed a greatly increased proton conductivity (0.082 S/cm), which is comparable to that of the commercially available Nafion membrane (0.09 S/cm), while still maintaining slightly better properties regarding the dimensional change and water uptake than those of the Nafion membrane.http://www.mdpi.com/1996-1073/7/3/1721polybenzimidazole (PBI)flexible PBIcross-linked PBIproton exchange membrane fuel cell (PEMFC) |
| spellingShingle | Kyungho Hwang Jun-Hyun Kim Sung-Yul Kim Hongsik Byun Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System Energies polybenzimidazole (PBI) flexible PBI cross-linked PBI proton exchange membrane fuel cell (PEMFC) |
| title | Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System |
| title_full | Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System |
| title_fullStr | Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System |
| title_full_unstemmed | Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System |
| title_short | Preparation of Polybenzimidazole-Based Membranes and Their Potential Applications in the Fuel Cell System |
| title_sort | preparation of polybenzimidazole based membranes and their potential applications in the fuel cell system |
| topic | polybenzimidazole (PBI) flexible PBI cross-linked PBI proton exchange membrane fuel cell (PEMFC) |
| url | http://www.mdpi.com/1996-1073/7/3/1721 |
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