隨機(jī)電阻網(wǎng)絡(luò)模型模擬質(zhì)子交換膜導(dǎo)電性能.pdf

1、天津大學(xué)碩士學(xué)位論文隨機(jī)電阻網(wǎng)絡(luò)模型模擬質(zhì)子交換膜導(dǎo)電性能姓名：段紹梅申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化學(xué)工程指導(dǎo)教師：王宇新20090801ABSTRACTFuelcelltechnologyisconsideredtobeapromisingcleanpowergeneratingtechnologyinthefutureProtonexchangemembraneisavitalcomponentoffuelcellsandhasastr

2、ongeffectontheperformanceoffuelcellPerfluorosulfonicacidionomers，suchasNation@，arestateoftheartmaterialsbecauseoftheirhighprotonconductivityandexcellentchemicalresistivityManyexperimentalevidencesprovedthatthemorphologye

3、speciallythehydrophiliChydrophobicnanophasesegregation，oftheNationmembranehaswithagreatimpactonitsprotonconductivityModelingtheeffectsofmorphologicalstructureofprotonexchangemembranesontheirprotonconductivityisexpectedtO

4、beabletogaininsightinunderstandingthemembranestructureperformancerelationsandtoprovideguidelinesforoptimizedmembranepreparationBecauseofitshydrophiliChydrophobicnanophasesegregation，protonexchangemembranecanberegardedasb

5、eingcomposedofaprotonconductivephaseandanonconductivephaseAtwophaselatticemodeloftheprotonexchangemembraneisconstructedbymeansofMonteCarlotechnique，whichisthenconvertedintesistancenetworksmodeltocalculateitsconductivityT

6、heeffectsofequivalentweightwatervolumefraction，thesizeandtheformofionicclustersofthemembraneonprotonconductivityaresystematicallyanalyzedwiththisresistancenetworksmodelTheeffectofthedifferentlyorientedstructuresofmembran

7、eonitsprotonconductivityisalsodiscussedbasedonthecalculationsviatheresistancenetworksmodelOursimulationresultsshowthatequivalentweightandwatervolumefractionhavegreatinfluenceontheprotonconductivityofmembraneCounterintuit

8、ivelytheconductivityofmembranewithquasiballshapedconductiveclustersishigherthanthatwithstickshapedclustersThestructureoptimizationofmembranethroughorientationoftheconductiveclusterscangreatlyenhancetheprotonconductivityo