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ID:11912606
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页数:13页
时间:2018-07-14
《石墨烯水凝胶的结构控制及其性能研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、---------------------------------------------------------------范文最新推荐------------------------------------------------------石墨烯水凝胶的结构控制及其性能研究摘要石墨烯具有大的比表面积和良好的导电性,将其制备成为水凝胶,可有效减少石墨烯片层的团聚。本论文采用氧化-还原法,以氧化石墨为原料、水合肼为还原剂,在氨水的碱性环境中成功制备出石墨烯水凝胶,利用SEM、FT-IR和Raman对样品进行了结构表征,并对其进行了电化学研究。结果表明,制备出的石墨烯水凝胶
2、具备褶皱的片状结构。温度对样品的电化学性能影响较大,随着温度升高,样品的比电容减小,最大比电容值为146.8F/g。原料经冰冻和解冻可使制备出的样品褶皱度获得一定程度的增加,但对比电容的贡献不大。凝胶烘干后,由于比表面积和孔体积的减小,电化学性能大幅下降。关键词石墨烯水凝胶超级电容器电化学性能9356毕业设计说明书(论文)外文摘要TitleTheStructuralControloftheGraphene13/13---------------------------------------------------------------范文最新推荐------------
3、------------------------------------------HydrogelsandtheirpropertiesAbstractGraphenehasalargespecificsurfaceareaandagoodelectricalconductivity,whichcouldbepreparedintheformofhydrogeltoreducetherestackingofthegraphenesheetseffectively.Inthispaper,oxidation-reductionmethodwasusedtopreparegr
4、aphenehydrogelwithgraphiteoxideastherawmaterialandhydrazinehydrateasreducingagentinthealkalineenvironmentoftheammonia.Thegraphenehydrogelwassuccessfullyprepared,whichwasalsocharacterizedbySEM,FT-IRandRaman,anditselectrochemicalpropertieswerestudiedaswell.Theresultsshowedthattheobtainedgrap
5、henehydrogelhasthefold-sheetstructure.Thetemperaturehasagreatinfluenceontheelectrochemicalpropertiesofthesamples,andthecapacitancesofthesamplesdecreasewith13/13---------------------------------------------------------------范文最新推荐------------------------------------------------------theincr
6、easingtemperature.Themaximumspecificcapacitancevalueis146.8F/g.Graphiteoxide,whichwasfrozenandthawed,couldincreasethecorrugationdegreeofthegraphenesheetstosomeextent,butthisdidn'tmakeagreatdifferencetothespecificcapacitanceofthesamples.Theelectrochemicalperformanceofthedriedgeldroppeds
7、ignificantlybecauseofthedecreasingsurfaceareaandporevolume.1.1石墨烯1.1.113/13---------------------------------------------------------------范文最新推荐------------------------------------------------------石墨烯的结构石墨烯由六边蜂窝状晶格组成,包括两层相互透入的三角晶格,每个晶格单元中含有两个碳原子。每个格点上的碳原子都有1个
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