Functionalized graphene oxide based on p-phenylenediamine as spacers and nitrogen dopants for high performance supercapacitors  

作　　者：Yanhong Lu Yi Huang Fan Zhang Long Zhang Xi Yang Tengfei Zhang Kai Leng Mingjie Zhang Yongsheng Chen 

机构地区：[1]School of Chemistry & Material Science,Langfang Teachers College [2]Collaborative Innovation Center of Chemical Science and Engineering (Tianjin),Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and Technology,Institute of Polymer Chemistry,College of Chemistry,Nankai University

出　　处：《Chinese Science Bulletin》2014年第16期1809-1815,共7页

基　　金：supported by the Ministry of Science and Technology (2012CB933401,2014CB643502);the National Natural Science Foundation of China (51273093,21374050,51373078);Natural Science Foundation of Tianjin (10ZCGHHZ00600);the Synergetic Innovation Center of Chemical Science and Engineering (Tianjin),Science and Technology Research Project of Higher Education of Hebei Province (z2012064);Science Research Project of Langfang Teachers College (LSZQ200908)

摘　　要：p-Phenylenediamine(PPD)functionalized graphene oxide(GO)materials(PPDG)were prepared through a one-step solvothermal process and their application as supercapacitors(SCs)were studied.The PPD is not only as the spacers to prevent aggregating and restacking of the graphene sheets in the preparing process but also as nitrogen sources to obtain the nitrogen-doped graphene.The structures of PPDG were characterized by Fourier transformed infrared spectroscopy(FT-IR),X-ray diffraction spectroscopy(XRD),Raman spectroscopy and X-ray photoelectron spectroscopy(XPS)and the results show that the nitrogen-doped graphene was achieved with nitrogen content as high as 10.85 at.%.The field emission scanning electron microscopy(FE-SEM)and high resolution transmission electron microscopy(HR-TEM)have confirmed that the morphologies of PPDG were loose layered with less aggregation,indicating that PPD molecules,as spacers,effectively prevent the graphene sheets from restacking during the solvothermal reaction.The special loose textures make PPDG materials exhibit excellent electrochemical performance for symmetric SCs with superior specific capacitance(313 F/g at 0.1 A/g),rate capability and cycling stability.The present synthesis method is convenient and may have potential applications as ultrahigh performance SCs.p-Phenylenediamine （PPD） functionalized graphene oxide （GO） materials （PPDG） were prepared through a one-step solvothermal process and their appli-cation as supercapacitors （SCs） were studied. The PPD is not only as the spacers to prevent aggregating and re-stacking of the graphene sheets in the preparing process but also as nitrogen sources to obtain the nitrogen-doped graphene. The structures of PPDG were characterized by Fourier transformed infrared spectroscopy （FT-IR）, X-ray diffraction spectroscopy （XRD）, Raman spectroscopy and X-ray photoelectron spectroscopy （XPS） and the results show that the nitrogen-doped graphene was achieved with nitrogen content as high as 10.85 at.%. The field emission scanning electron microscopy （FE-SEM） and high resolu-tion transmission electron microscopy （HR-TEM） have confirmed that the morphologies of PPDG were looselayered with less aggregation, indicating that PPD mole-cules, as spacers, effectively prevent the graphene sheets from restacking during the solvothermal reaction. The special loose textures make PPDG materials exhibit excellent electrochemical performance for symmetric SCs with superior specific capacitance （313 F/g at 0.1 A/g）, rate capability and cycling stability. The present synthesis method is convenient and may have potential applications as ultrahigh performance SCs.

关 键 词：电化学性能 超级电容器 对苯二胺 氧化物 官能化 石墨 氮源 场发射扫描电子显微镜 

分 类 号：TQ127.11[化学工程—无机化工]