Proton Exchange Membrane Fuel Cell has the potential to become an important energy conversion technigne. Lots of efforts oriented toward the electrochemical conversion of energy using proton exchange membrane (PEM) fuel cells have been enormously accelerated with the hope to promote as an alternative power source for transport and portable purposes. However, they still suffer from such disadvantages as limited operation temperature, high cost, insufficient durability and high methanol permeability.Good membranes should meet several strict requirements as follows; reasonable proton conductivity, high stability and durny the performance of a fuel cell environment,outstanding mechanical toughness, high heat endurance, and impermeability to fuel gas or liquid. Presently,a lot of references have mentioned some sulfonatied polymer sulfonated of poly(ether ether ketone) (SPEEK), sulfonatedpolysulfone (SPSF), sulfonated polysulfide sulfone(SPSS), and polybenzimidazole(PBI) and so on.To achieve high proton conductivity usually match with a high degree of sulfonation that means owning a large Ion Exchange Capacity, IEC.But which in turn leads to a decrease in the electrochemical¡Bdimensional stability¡Bwater uptake¡Boxidative stability.
Therefore they suffer from such disadvantages as limited operation range of temperature.Three aromatic poly(arylene ether)s P4b¡BP4c¡BP4d were synthesized from the polymer consists nine of polyaromatic groups with bisfluoride monomer at studying long time in our laboratory with S1¡BS2¡BS3 diol monomer.The molecular weight of the polymer (Mw:1.49¡Ñ105~5.3¡Ñ105 g/mol ,PDI: 1.82~2)This polymer has high strength,thermal stability and all of polymers own very high Td ,which are over than 500oC.We sulfonatied the polymer in order to apply as the proton exchange membrane of a fuel cell.The results showed after sulfonation of P4b¡BP4c¡BP4d.All IEC reaches 3.9~1(meq/g).According to above result, we propose the aromatic poly(arylene ether)s is good matenal can be used on all application as a proton exchange membrane.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0721112-172315 |
| Date | 21 July 2012 |
| Creators | Chu, Meng-Han |
| Contributors | Tzong-Liu Wang, Ko-Shan Ho, Hsin-Lung Chen, Weng-Yao Huang, Mei-Ying Chang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721112-172315 |
| Rights | user_define, Copyright information available at source archive |
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