電化學(xué)可控合成納米錳氧化物及其電化學(xué)性質(zhì)研究.pdf

1、華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文電化學(xué)可控合成納米錳氧化物及其電化學(xué)性質(zhì)研究姓名：文慧申請學(xué)位級別：碩士專業(yè)：環(huán)境工程指導(dǎo)教師：劉凡20090601華中農(nóng)業(yè)大學(xué)2009屆碩士學(xué)位論文ABSTRACTManganesedioxideWaSwidelyusedinthefieldofchemicalpowerseparationandcatalysisaSacolnnlonmanganeseoxideforitsspecialstructurean

2、dperformanceInordertosynthesizethemanganesewithparticularstructureandmorphologyitspreparationmethodshaSbeenresearchedwidelyanddeeplyThemethodofelectrochemicaldepositionattractscommonattentionforthereasonofitsgentleprepar

3、ationconditions，controllablecomponentsandmorphologyandhighcrystallizationcapacityChangingtheelectrodepositingconditionsoftemperature，pHvalue，electrolytetypeandcurrentdensitywilldeeplyinfluencethecomponents，Mnaveragedegre

4、eofoxidation，crystalstructure，andmorphologyoftheproductElectrocapacitorsisanewtypeofelectrochemicalenergystoragedevicesTheyhavehighpowerdensityhi曲charge／dischargeefficiencyandlongcyclelifeincomparisonwithrechargeablebatt

5、eriesandtraditionalelectrostaticcapacitorsThestudyofsupercapacitorsmainlyconcentratedontheelectrodematerialsAmongstSOmanykindofelectrodematerials，manganesedioxidearousedmostattentionbecauseofitslowprice，environmentalfrie

6、ndlyandexcellentperformancewhichisconsidered嬲themostpotentialelectrodematerialofelectrochemicalcapacitorsThroughchangingthereactionconditionssuchastemperature，voltage，concentrationofH十a(chǎn)ndmixingMg十，wepreparedaseriesofdiff

7、erentstructuresandmorphologiesofMn02byelectrolysisin005mol／LMnCl2electrolyte，andselectedtherepresentativeMn02嬲theelectrodematerialsofelectrocapacitorsandtookmeaSureofdischargingspecificcapacitanceoftheseMn02byconstantcur

8、rentcharge／dischargeexperimentAccordingtotheexperimentalresults，wediscussedtheeffectsoftemperature，voltage，HionconcentrationandmixingMgforthestucture，morphologyparticlesize，specificsurfaceareaandspecificcapacitanceofdepo

9、sitedMn02Theexperimentalresultsare嬲follows：1ThecrystalstructuresofelectrolyticproductsweremainlyaffectedbytemperatureandconcentrationofH十a(chǎn)Mn02Callbepreparedonlyintheconditionsof100℃andC[HCl]=2mol／L，andintheotherelectroly

10、seconditionsoftemperatureandconcentrationofH十，alltheMn02preparedaresimilartoNsutite“一Mn02)2ThemorphologyparticlesizeandspecificsurfaceareaofEMDweremainlyaffectedbytemperature，voltageandconcentrationofH十，hasthefollowingru

11、les：ThemorphologyofEMDshowedaruleofphaSicchangeaSthevoltagerisingwhenthetemperatureandconcentrationofHinacertainconditionneparticlesizeofEMDismainlycontrolledbytemperatureGenerallytheparticlesizewassmaller(between30nm60n