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1、---------------------------------------------------------------范文最新推薦------------------------------------------------------石墨烯水凝膠的結(jié)構(gòu)控制及其性能研究摘要石墨烯具有大的比表面積和良好的導(dǎo)電性,將其制備成為水凝膠,可有效減少石墨烯片層的團(tuán)聚。本論文采用氧化-還原法,以氧化石墨為原料、水合肼為還原劑,在氨水的堿性環(huán)境中成功制備出石墨烯水凝膠,利用SEM、FT-IR和Raman對樣品進(jìn)行了結(jié)構(gòu)表征,并對其進(jìn)行了電化學(xué)研究。結(jié)果表明,制備出的石墨烯水凝膠
2、具備褶皺的片狀結(jié)構(gòu)。溫度對樣品的電化學(xué)性能影響較大,隨著溫度升高,樣品的比電容減小,最大比電容值為146.8F/g。原料經(jīng)冰凍和解凍可使制備出的樣品褶皺度獲得一定程度的增加,但對比電容的貢獻(xiàn)不大。凝膠烘干后,由于比表面積和孔體積的減小,電化學(xué)性能大幅下降。關(guān)鍵詞石墨烯水凝膠超級電容器電化學(xué)性能9356畢業(yè)設(shè)計(jì)說明書(論文)外文摘要TitleTheStructuralControloftheGraphene13/13---------------------------------------------------------------范文最新推薦------------
3、------------------------------------------HydrogelsandtheirpropertiesAbstractGraphenehasalargespecificsurfaceareaandagoodelectricalconductivity,whichcouldbepreparedintheformofhydrogeltoreducetherestackingofthegraphenesheetseffectively.Inthispaper,oxidation-reductionmethodwasusedtopreparegr
4、aphenehydrogelwithgraphiteoxideastherawmaterialandhydrazinehydrateasreducingagentinthealkalineenvironmentoftheammonia.Thegraphenehydrogelwassuccessfullyprepared,whichwasalsocharacterizedbySEM,FT-IRandRaman,anditselectrochemicalpropertieswerestudiedaswell.Theresultsshowedthattheobtainedgrap
5、henehydrogelhasthefold-sheetstructure.Thetemperaturehasagreatinfluenceontheelectrochemicalpropertiesofthesamples,andthecapacitancesofthesamplesdecreasewith13/13---------------------------------------------------------------范文最新推薦------------------------------------------------------theincr
6、easingtemperature.Themaximumspecificcapacitancevalueis146.8F/g.Graphiteoxide,whichwasfrozenandthawed,couldincreasethecorrugationdegreeofthegraphenesheetstosomeextent,butthisdidn'tmakeagreatdifferencetothespecificcapacitanceofthesamples.Theelectrochemicalperformanceofthedriedgeldroppeds
7、ignificantlybecauseofthedecreasingsurfaceareaandporevolume.1.1石墨烯1.1.113/13---------------------------------------------------------------范文最新推薦------------------------------------------------------石墨烯的結(jié)構(gòu)石墨烯由六邊蜂窩狀晶格組成,包括兩層相互透入的三角晶格,每個晶格單元中含有兩個碳原子。每個格點(diǎn)上的碳原子都有1個