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《鋰離子電容器及其脫2f嵌鋰材料性能的分析》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、鋰離子電容器及其脫/嵌鋰材料的性能研究crystalstructure.TheresultsofelectrochemicaltestsshowedthatthedischargecapacityofLi4Ti5O12couldbeincreasedfirstandthendecreasedwithincreasingofcoatedcarbonquantity.Whenthequantityofmesophasepitchwas5%,theLi4Ti5O12/Ccompositematerialexhibitedexcel
2、lentelectrochemicalproperty.ItwasfoundthatLi4Ti5O12coatedwith5%carbonhadbetterperformancewhenthelithiumioncapacitorwithACwasassembledaspositiveelectrodeandLi4Ti5O12/Casnegativeelectrode.Theresultsshowedthattheoxidation-reductionreactionofAC/Li4Ti5O12lithiumioncapac
3、itorwasconsistentwithwhathappenedinhalf-celllithiumionbattery.Theinternalresistanceofthesystemwasfirstdecreasedandthenincreasedwiththeincreasingofcoatedcarbonquantity.LiMn2O4-ACwithdifferentLiMn2O4:ACmolarratiosaspositiveelectrodeandACasnegativeelectrodewasassemble
4、d,anditwasfoundthatratecapabilityandcyclicpropertyoflithiumioncapacitorwerethebestwhenLiMn2O4:ACmolarratiowas1:1.Thedischarge2capacityunder5mA/cmcurrentdensitywas49.5F/g,andthedischargecapacityretentionwas87.3%after1000cycles.FaradayprocesstookplacewhenLiMn2O4-AC/A
5、Clithiumioncapacitorworked.Lithiumioncapacitorstillshowedtheimpedancecharacteristicsofasupercapacitor,andtheinternalresistanceofthesystemwasfirstdecreasedandthenincreasedwiththeincreasingofthecontentofLiMn2O4.WhenLiMn2O4:ACmolarratiowas1:1,itwas20Ω.Keywords:Lithium
6、ioncapacitor;Graphite;Enlargementlayers;Li4Ti5O12;carboncoating;LiMn2O4.VIII碩士學(xué)位論文目錄學(xué)位論文原創(chuàng)性聲明和學(xué)位論文版權(quán)使用授權(quán)書...................................................I摘要..........................................................................................................
7、..............VAbstract..................................................................................................................VII插圖索引.................................................................................................................XII附表索引.
8、...............................................................................................................XIV第1章緒論..........................
