20164.基于海藻酸鈉的碳氣凝膠材料的制備及結(jié)構(gòu)性能研究

1、分類號：TQ34密級：不保密UDC：661學(xué)校代碼：11065碩士學(xué)位論文基于海藻酸鈉的碳氣凝膠材料的制備基于海藻酸鈉的碳氣凝膠材料的制備及結(jié)構(gòu)性能研究及結(jié)構(gòu)性能研究張立杰指導(dǎo)教師夏延致教授學(xué)科專業(yè)名稱材料學(xué)論文答辯日期2015年6月8日AbstractCarbonaerogelshavemanymeritssuchashighsurfaceareasabundantpestructuresespeciallyopenholestruc

2、tureslowdensities.What’smetheganizationalstructureofcarbonaerogelshaveexcellentstabilitywhichmakecarbonaerogelshavegreatpotentialappliedincatalystcatalystsuppt.Meanwhilethecarbonaerogelshavehighconductivitylowinternalres

3、istancegoodcrosionresistantability.Theseadvantagesmakecarbonaerogelssuitableappliedinlithiumionbatterycathodematerials.Sodiumalginateisanaturalmacromolecularpolysacidepolymerextractedfrombrownseaweeds.Aparticularlyadvant

4、ageousacteristicofalginatesolutionsistheircapacitytofmhydrogelsinthepresenceofdivalentcations.Wecanobtainaerogelsaftertthehydrogelsdehydrateviaafreezedryingprocess.Thismethodwemakeaerogelsissimpleenvironmentalfriendly.Th

5、ecarbonaerogelsobtainedfromcarbonizationofaerogelscanbeusedinadsptioncathodecatalystsoffuelcelllithiumionbatterycathodematerials.Inthiswkwehaveusedsodiumalginate(SA)asprecurssdonethefollowingthreepartresearch:(1)Aerogels

6、withlowdensitiesweresuccessfullypreparedbyuseingSAasprecerssitsadsptioncapacitytoganicsolventsweretested.Resultsshowthatcarbonaerogelswemadehaveexcellentadsptionproperty.(2)HydrogelsrichinmetalionswerepreparedbyuseingSAg

7、rapheneasrawmaterialsintroduingCoCuNimetalprecerssaerogelswasobtainedbydehydratedthemviaafreezedryingprocess.FinallyaftercalcinedinNH3atmosphereNdopedcarbonaerogelswasobtained.Weusedelectrochemicalwkstationtestingitscata

8、lyticperfmanceascathodecatalystsoffuelcell.(3)CarbonaerogelsweredealedwiththeKOHchemicalactivation.WeusedelectrochemicalwkstationLsystemtestingtheperfmanceofabovematerialsappliedinlithiumionbatterycathodematerials.Keywds