Corresponding Author

Hong_feng XU


Treat carbon paper with 3% PTFE solution and dried in 340 ℃ for 40 minutes to enhance its intension, and level off the surface of the carbon paper with a mixture of XC_72 carbon black and PTFE solution. With those treated carbon paper as electrodes,recast Nafion thin film from 5% Nafion solution as humidity sensitive material, a solid polymer electrolyte humidity sensor was prepared on a thin PET film.Take the relative humidity data from several saturated salt solutions, the relationship between conductivity response and relative humidity was studied at different relative humidies.The results showed: when the polymer electrolyte was H+ type,the linear response of range was about 40%~97% relative humidity, and exchanging the H+ of the Nafion into Li+, a linear response range was from 10% to 97% relative humidity, the humidity sensor has good stability and reversibility in 200 hours,its response time is less than 40 seconds and its conductivity response is less affected by temperatures.

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[1] SrinivasanS,VelevOA,ParthasarathyA,etal.Highenergyefficiencyandhighpowerdensityprotonexchangemembranefuelcell_electrodekineticsandmasstransport[J].J.PowerSources,1991,36(1):299.

[2] McelroyJF.SPEwaterelectrolyzersinsupportofmissionfromplanetearth[J].J.PowerSources,1991,36(1):219.

[3] PusatiogluSY,Milwaukee,ZuercherJC,LewisEG,etal.Moisturesensor[P].USPatent:5036704,1991.

[4] RaimundoIM,NarayanaswamyR.Evaluationofnafion_crystalvioletfilmsfortheconstructionofanopticalrelativehumiditysensor[J].Analyst,1999,124(11):1623.

[5] PeiQingqing,ChenZaikang.Anexperimentalstudyonisothermalmoistureabsorptionanddesorptionprocessofsomecommonusedbuildingmaterial[J].J.ofHunanUniversity(inChinese).1999,26(4):87.

[6] YangC,SrinivasanS,BenzigerJ,etal.Wateruptakeandconductivityofcompositemembraneoperatingatreducedrelativehumidity[C].ElectrochemistrySociety,201meetingabstracts,1010.



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