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时间:2020-03-27
《聚苯胺复合电极材料的制备和电化学性能.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、物理化学学报(WuliHuaxueXuebao)SeptemberActaPhys.一Chim.Sin.2014,30(9),1659—16661659[Article】doi:10.3866/PKU.WHXB201406162、^r、VⅥ,.whxb.pku.edu.cn功能化石墨烯,聚苯胺复合电极材料的制备和电化学性能汪丽丽邢瑞光张邦文侯渊(内蒙古科技大学稀土学院,内蒙古包头014010)摘要:利用水合肼还原十八胺(ODA)接枝的氧化石墨烯(GO),得到了十八胺功能化石墨烯(ODA.G),将ODA-G与聚苯胺(PANI)通过溶液共混法,制备了功能化
2、石墨烯和聚苯胺纳米复合材料(ODA.G/PANI).采用傅里叶变换~Z#I-(FTIR)光谱、X射线衍射(XRD)、热重分析(TGA)、拉曼(Raman)光谱及透射电镜(TEM),对复合材料的结构和形貌进行了表征:利用循环伏安、恒流充放电及交流阻抗谱等,对复合材料的电化学性能进行了测试.结果显示,少量ODA-G的引入为PANI的电化学氧化还原反应提供了更多的电子通道和活性位置,有利于提高PANI的赝电容.在电流密度1.0A·g下,2%(w)ODA.G/PANI的比电容达到787F·g~。而相应的PANI仅有426F·g~.此外,ODA.G/PANI的循
3、环稳定性也远高于纯PANI.关键词:功能化石墨烯;聚苯胺:超级电容器;电化学性能:溶液混合中图分类号:O646PreparationandElectrochemicalPropertiesofFunctionalizedGraphene/PolyanilineCompositeElectrodeMaterialsWANGLi-LiXINGRui-GuangZHANGBang—WenHOUYuanfSchoolofRareEarth,InnerMongoliaUniversityofScience&Technology,Baotou014010,Inne
4、rMongoliaAutonomousRegion,PR.China)Abstract:Octadecylaminefunctionalizedgraphene(ODA.G)wassynthesizedbythegraftingofgrapheneoxide(GO)withODAfolowedbyreductionwithhydrazinehydrate.Subsequently,ODA-G/polyaniline(PANI)compositeswerepreparedusingafacilesolvent—blendingprocedure.ODA-
5、GandODA—G/PANIcompositeswerecharacterizedbyFouriertrangf0rminfraredspectrometry(FTIR),X-raydifraction(XRD),thermogravimetricanalysis(TGA),Ramanspectroscopy,andtransmissionelectronmicroscopy(TEM).TheelectrochemicalpropertiesoftheCOlTIpositesweremeasuredbasedoncyclicvoltammetry(cv
6、),galvanostaticcharge/discharge,andacimpedancespectroscopy.TheresultsshowthatODA-GasasupportmateriaIprovidesadditionaIelectrontransferpaths,aswellasactivesites,fortheelectrochemicaIredoxreactionofPANl,whichhelpstoincreaseitspseudocapacitance.Aspecificcapacitanceof782F·g。iSobtain
7、edfor2%(ODA—G,PANlatacurrentdensityof1.0A。g~,compa~dwith426F‘g~forPANI.Furthermore,oDA_G/PANIexhibitsbetterstabilitythanPANI.KeyWords:Functionalizedgraphene;Polyaniline;Supercapacitor;ElectrochemicalpropertySolvent-blendingReceived:Mav19,2014;Revised:June16,2014;PublishedonWeb:J
8、une16,2014.Correspondingauthor.Email:bangwenz@1
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