Li1+XAlXTi2-X(PO4)3的制備及其復(fù)合PEO聚合物電解質(zhì)的研究.pdf

1、10459200612019080502014文學(xué)論大位州學(xué)鄭士碩(科學(xué)學(xué)位)Lilx擬x五2一x(pO4):的制備及其復(fù)合PEO聚合物電解質(zhì)的研究院系名學(xué)科門專業(yè)名作者姓導(dǎo)師姓名、稱:材料科學(xué)與工程學(xué)院類:工學(xué)稱:材料學(xué)名:戶赫龍職稱:賈曉林教授二零零九年五月AbstractComPositePol卿ereleetrolyteshasawideaPPlieationProsPeetinlithiumbatteriesftheProPe

2、ritiesofeasymaehining，largesealefilmfmingandgoodPlastieity.PEO15themostimPortantmatrixoftheeomPositePolymereleetrolytes.Li一xAlxTiZ一x(PO4)3(X=0.2一0.5)eouldaddLiiontotheeleetrolytes，lowerthedegreeoferystallinityofthePolyme

3、r，andimProvestheelectriealeonduetivity.InthisPaPer，LilxAlxTiZ一x(PO4):nanoPowderswasusedasfiller，whichwasPreParedby501一gelmierowaveheatingmethod，thenPEOLICIO4LilxAlxTiZ一x(PO4)3Pol卿ereleetrolyteswerePreParedbyasolution一eas

4、tmethod.Investigationshavebeenca幣edonthestrueture，theerystallizationProPerty，themorphologyandtheconductivityoftheseeomPositePolymereleetrolytes，usingIR，XRD，SEMandeleetriealimPedanee(El)measurement50onLi一xAlxTiZ一x(PO4)3na

5、noPowderswasaequiredbyeonventionalheatingmierowaveheatingfromPreeusorwhiehwasPreParedby501一gelmethod.TheeffeetsofPHvalueonthegelationandPowdergranularity，theinflueneeoftheheattreatmentmodeonthesynthesiseonditionandtheimP

6、aetofAImixingcontentontheconduetivitywerestudied.IteanbeeoneludedthatwhenthePHvalueofsolutionwas3.8，stable501eouldbeobtained，whileParticlesizeofPowderswassmallest.TreatmenttemPeratureandholdingtimeofthemierowaveheatingeo

7、uldbelowerandshorten，eomParingwithconventionalheating.GrainsizeofthePowdersobtainedbymicrowaveheatingwassmaller，andPowerswerewelldistributed，50thespeeifiesurfaceareawasbigger(400mZg).TheionieeonduetivityofLi.十xAlxTiZ一x(P

8、O4)3inereasedatfirst，thendeereasedasinereasingofAIeontent.TheeonduetivitywasbestwhentheX150.3，whiehwas2.2sxlo一55em二PEOLICIO4Li一3Alo3Ti!.7(PO4)waspreparedwithLi，3Alo.3Ti一7(PO4):asfiller.TheeffeetsofPEOmoleeularweightandfi