铝锂混合掺杂尖晶石相Li_(1+x)Al_yMn_(2-y)O_4材料结构性能的研究

电化学（中英文） ›› 2001, Vol. 7 ›› Issue (4): 433-438.

铝锂混合掺杂尖晶石相Li_(1+x)Al_yMn_(2-y)O_4材料结构性能的研究

郑子山,唐子龙,张中太,沈万慈

清华大学材料系新型陶瓷与精细工艺国家重点实验室,清华大学材料系新型陶瓷与精细工艺国家重点实验室,清华大学材料系新型陶瓷与精细工艺国家重点实验室,清华大学材料系新型陶瓷与精细工艺国家重点实验室北京100084 ,北京100084 ,北京100084 ,北京100084

收稿日期:2001-11-28 修回日期:2001-11-28 出版日期:2001-11-28 发布日期:2001-11-28

An Investigation of Structural Properties of Li-Al-mixed Doped Spinels Materials Li_(1+x) Al_yMn_(2-y)O_4

ZHENG Zi_shan *,TANG Zi_long,ZHANG Zhong_tai,SHENG Wan_ci

(Dept. of Materials Sci. and Engin. State Key Lab. of New Ceramics and Fine Processing, Tsinghua Univ., Beijing 10084, China

Received:2001-11-28 Revised:2001-11-28 Published:2001-11-28 Online:2001-11-28

摘要/Abstract

摘要： 采用一种简单的合成工艺 ,将铝和锂混合掺入到主尖晶石相锰酸锂中 ,研究不同掺杂铝量对材料的初始容量及循环稳定性能的影响 .结果表明同时掺杂铝锂的材料要比单独掺杂铝或锂的循环稳定性好 .利用扫描电镜、粉末X_射线衍射仪、红外光谱仪对材料形貌及结构进行研究 ,结果表明所合成的掺杂铝锂材料颗粒细小、分布均匀 ,具有较好的结晶性能 ,较高的初始容量和良好的循环稳定性 ,其初始容量达 119mAh/g ,循环 2 0 0次后容量仍然保持在 10 6mAh/g

关键词: 锂离子电池, LiMn2O4, 掺杂, 红外光谱

Abstract: Al and Li elements were co_doped into host spinel lithium manganese oxide by a simple and economical preparation technology . There was an investigation of the influence of doped Al contents on the initial capacity and cycling performance of the materials. The investigation of the XRD patterns, the analysis of the SEM micrographs and the determination of IR spectroscopy showed that the particles of dopant materials are fine, narrowly distributed and well crystallized, and the bonds Mn_O are stronger than these of undoped materials. The resulted materials have a high initial capacity of 119 mAh/g and good cycling characterization. The capacity still kept at 106 mAh/g after 200 cycles.

Key words: Lithium_ion batteries, LiMn 2O 4, Cation dopant, IR spectroscopy

中图分类号:

TM911

郑子山,唐子龙,张中太,沈万慈. 铝锂混合掺杂尖晶石相Li_(1+x)Al_yMn_(2-y)O_4材料结构性能的研究[J]. 电化学（中英文）, 2001, 7(4): 433-438.

ZHENG Zi_shan *,TANG Zi_long,ZHANG Zhong_tai,SHENG Wan_ci . An Investigation of Structural Properties of Li-Al-mixed Doped Spinels Materials Li_(1+x) Al_yMn_(2-y)O_4[J]. Journal of Electrochemistry, 2001, 7(4): 433-438.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2001/V7/I4/433

参考文献

[1]　XiaYongyao,ZhouYunhong,YoshioMasakiCapacityfadingoncyclingof4VLi/LiMn2O4[J].J.Elec trochem.Soc.,1997,144:2593～2600. [2]　GummowRJ ,KockAde,ThackerayMM .Improvedcapacityretentioninrechargeable4Vlithiumman ganeseoxide(spinel)cells[J].SolidstateIonics,1994,69:59～67. [3]　ThackerayMM ,Shao～HornY ,KahaianAJ .Structuralfatigueinspinelelectrodesinhighvoltage(4V)Li/LixMn2O4 cells[J].ElectrochemSolidStateLett.,1998,1:7～8. [4]　LeeJongH ,HongJinK ,JangDongH ,etal.DegradationmechanismsindopedspinelsofLiM0.05Mn1.95O4(M =Li,B ,Al,Co,andNi)forLisecondarybatteries[J].J .PowerSources,2000,89:7～14. [5]　AroraP ,PopovBN ,WhiteRE .Electrochemicalinvestigationsofcabalt_dopedLiMn2O4 ascathodematerialforlithium_ionbatteries[J].J .Electrochem.,Soc.,1998145:807～814. [6]　TarasconJM ,MckinnonWR ,CoowarF ,etal.SynthesisconditionsandoxygenstoichiometryeffectsonLiinsertionintothespinelLiMn2O4[J].J .Electrochem.Soc.,1994,141:1424～1431. [7]　VoglerC ,ButzA ,DittrichH ,etal.Electrochemicalandstructuralcomparisonofdopedlithiummanganesespinels[J].J.PowerSources1999,84:243～247. [8]　TarasconJM ,WangE ,ShokoohiF ,K .ThespinelphaseofLiMn2O4 asacathodeinsecondarylithiumcells[J].J .Electrochem.Soc.,1991,138:2859～2864. [9]　RobertsonAD ,LuSH ,HowardWF .M3+_modifiedLiMn2O4 spinelintercalationcathodesⅡElectro chemicalstabilizationbyCr3+[J].J .Electrochem.Soc.,1997,144:3500～3512. [10]　Wohifahrt_MehrensM ,ButzA ,OestenR .Theinfluenceofdopingontheoperationoflithiummanganeseoxidespinel[J].J.Electrochem.Soc.,1997,68:582～585. [11]　LiGuohua,IkutaH ,VchidaT ,WakiharaM .ThespinelphasesLiMyMn2yO4(M =Co,Cr,Ni)asthecath odeforrechargeablelithiumbatteries[J].J.Electrochem.Soc.,1996,143:178～182. [12]　AroraP .PopovBN ,WhiteRE .Electrochmicalinvestigatonsofcobalt_dopedLiMn2O4 ascathodematerialforlithium_ionbatteries[J].J .Electrochem.Soc.,1998,145:807～815. [13]　PereamuageD ,AbrahamKM .PreparationandelectrochemicalcharacterizationofoverlithiatedspinelLiMn2O4[J].J .Electrochem.Soc.,1998,145:1131～1136. [14]　WangGX ,BradhurstDH ,LiuHK ,etal.ImprovementofelectrochemicalpropertiesofthespinelLiMn2O4 usingaCrdopanteffect[J].SolidStateInics,1999,120:95～101. [15]　SongD ,IkutaH ,UchidaT ,WakiharaM .ThespinelphasesLiAlyMn2_yO4(y=0,1/12,1/9,1/6,1/3)andLi(Al,M )1/6Mn11/6O4(M =Cr,Co)asthecathodeforrechargeablelithiumbatteries[J].SolidStateInics,1999,117:151～156. [16]　OhzukuT ,KitagawaM ,HiraiT .ElectrochemistryofmanganesedioxideinlithiumnonaqueouscellⅢ.X_raydiffractionalstudyonthereductionofspinel_relatedmanganes4edioxide[J].E .J .Electrochem.Soc.,1990,137:769～775