PANI磁粉的合成、表征及氧传递作用.pdf

《PANI磁粉的合成、表征及氧传递作用.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、物理化学学~(WuliHuaxueXuebao)NovemberActaPhys．一Chim．Sin．2011，27(11)，2625-26312625[Article]www．whxb．pku．edu．cnNd2Fe，4B，PANl磁粉的合成、表征及氧传递作用史继诚徐洪峰卢璐傅杰(大连交通大学环境与化学工程学院，辽宁大连116028)摘要：经球磨和原位聚合法合成了NdFe，B／PANI磁粉，采用X射线衍射(XRD)、傅里叶变换红外(FTlR)光谱、扫描电镜(SEM)、振动样品磁强计(VSM)对样品进行了表征，用电化学三电极体系和锌空电池考

2、察了NdFe14B／PANI材料在氧传递中的作用．结果表明：NdFe，B／PANI是一维片状纳米材料，电导率O．54S·cm～，内禀矫顽力和剩余磁化强度为149．57kA·m～、20．27A·m·kg：NdFeB／PANI负载密度为0．40mg·cm时，磁性电极的双电层电容增大，传荷电阻减小，磁性锌空电池的极化电流较大：负载密度为3．60mg·cm时，磁性电极的双电层电容减小，传荷电阻增大，磁性锌空电池的极化电流较小．NdFeB／PANI负载密度小于O．89mg·cm时，微磁场促进氧的传质，提高锌空电池的放电性能：高于3．56mg·cm时，

3、微磁场抑制氧的传质，降低锌空电池的放电性能：NdFe，B／PANI中的PANI提高锌空电池的放电性能．关键词：磁场：双电层电容：传荷电阻：氧传递：锌空电池中图分类号：0646SynthesisandCharacterizationofNd2Fe14B／PANIandItsFunctionduringtheOxygenTransferProcessSHIJi—ChengXUHong-FengLULuFUJiefCollegeofEnvironmentalandChemicalEngineering,DalianJiaotongUniversi

4、ty,Dalian116028,LiaoningProvince,R．China)Abstract：Nd2Fe14B，PANImagneticpowderwaspreparedbyballmillingandin-situpolymerization．ThesampleswerecharacterizedbyX．raypowderdifraction(XRD)，Fouriertransforminfrared(FTIR)spectroscopy，scanningelectronmicroscopy(SEM)，andvibratingsamp

5、lemagnetometer(VSM)．ThefunctionofNd2Fe14B／PANlintheoxygentransferprocesswasdeterminedusinganelectrochemicalthreeelectrodesystemandazincairbattery．TheresultsshowedthalNd2Fe，B，PAN1wasaone-dimensionallamellarnanostructuredmaterialwithanelectricalconductivityof0．54S·cm～。anintr

6、insiccoerciveforceof149．57kA·m～，andaresiduaImagnetizationof20_27A·m·kg～．Fora0．40mg·cm～Nd2Fe14B／PANlloaddensitythemagneticelectrodereachedahigherdoubleelectriclayercapacitance，asmallerchargetransferresistancethananonmagneticelectrodeandthepolarizationcurrentofthemagneticzin

7、cairbatteryalsoincreased．Fora3．60mg·cmloaddensitytheresultswerecontrarytothoseofthe0．40mg·cmloaddensitytest．WefoundthatthemicromagneticfieldpromotedtheoxygentransferprocessandimprovedthezincairbatteryperformancewhentheNd2Fe14B，PANIIoaddensitywasIessthan0．89mg·cm～．Ataloadde

8、nsityhigherthan3_56mg·cm～，themicromagneticfieldinhibitedoxygentransferandreducedthezincai