Development of carbon nanotube and graphite filled polyphenylene sulfide based bipolar plates for all-vanadium redox flow batteries
用于全钒液流电池的碳纳米管和石墨填充聚苯硫醚基双极板的开发
出版日期:2014
作者单位:aFraunhoferInstituteforChemicalTechnology(ICT),AppliedElectrochemistryDepartment,Joseph-von-FraunhoferStr.7,76327Pfinztal,GermanybFraunhoferInstituteforChemicalTechnology(ICT),PolymerEngineeringDepartment,Joseph-von-FraunhoferStr.7,76327Pfinztal,GermanycVTTTechnicalResearchCentreofFinland,P.O.Box1300,33101Tampere,Finland杂志名称:Journal of Power Sources
卷号:256
期数:Complete
刊号:0378-7753
出版日期:2014
简介:Inthisstudy,syntheticgraphiteandcarbonnanotube(CNT)filledpolyphenylenesulfide(PPS)basedbipolarplatesareproducedbyusingco-rotatingtwin-screwextruderandinjectionmolding.GraphiteisthemainconductivefillerandCNTsareusedasbridgingfillerbetweengraphiteparticles.Toimprovethedispersionofthefillersandtheflowbehaviorofthecomposite,titanatecouplingagent(KR-TTS)isused.TheconcentrationeffectofCNTsandcouplingagentonthepropertiesofbipolarplatesareexamined.At72.5?wt.%totalconductivefillerconcentration,byadditionof2.5?wt.%CNTand3?wt.%KR-TTS;through-planeandin-planeelectricalconductivitiesincreasefrom1.42?S?cm?to20?S?cm?and6.4?S?cm?to57.3?S?cm?respectivelycomparedtosamplewithoutCNTsandadditive.Extrudertorquevalueandapparentviscosityofsamplesdecreasesignificantlywithcouplingagentandasaresult;theflowbehaviorispositivelyaffected.Flexuralstrengthisimproved15%byadditionof1.25?wt.%CNT.Differentialscanningcalorimeter(DSC)analysisshowsnucleatingeffectofconductivefillersonPPSmatrix.Corrosionmeasurements,cyclicvoltammetryandgalvanostaticcharge-dischargetestsareperformedtoexaminetheelectrochemicalstabilityandtheperformanceofproducedbipolarplatesinall-vanadiumredoxflowbattery.
