Mg~(2+)掺杂LiFePO_4C的结构及电化学性能 Structure and electrochemical performance of Mg~(2+)doped LiFePO_4C.pdfVIP
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Mg~(2)掺杂LiFePO_4C的结构及电化学性能StructureandelectrochemicalperformanceofMg~(2)dopedLiFePO_4C
第39卷第5期 电 池 VoI.39,No.5 2009芷10月 BATTERYBlMONTttLY Oct.,2009 M 04/C的结构及电化学性能 92+掺杂LiFeP 胡林,李征,曾照强 (清华大学材料科学与工程系,新型陶瓷与精细工艺国家重点实验室,北京 100084) C首次放电比容量为155 LiFeo.95Mgo05P04/C的O.2 C循环20次,放电容量几乎无衰减。 mAh/g;LiFe0.9M90.1P04/c以10.0 关键词:正极材料;LiFeP04;高倍率性能;掺杂 中图分类号:TM912.9文献标识码:A 文章编号:1001—1579(2009)05—0240—03 Structureandelectrochemicalof LiFeP04/C performanceM92+doped HU Lin,LI Zheng,ZENGZhao-qiang NewCeramics of andFine of (State嘶Laboratory Processing,Department MaterialsScienceand 100084,China) Engineering,TsinghuaUniversity,Beijing and were viasolid-statemethod.The Abstract:LiFeP04/C,LiFeo.95Mgo.05P04/CLiF%.9Mgo.1P04/C synthesized discharge and were o.2Cinitial of specificcapacitycycleperformance by Mg“.The LiFeo.95 improveddoping specificdischargecapacity was 155 of almosthadno after20 at10.0C. Mgo.05P04 mAh/g.ThedischargecapacityLiFeo.9Mgo.1P04/C fading cycles words:cathode rate Key material;LiFeP04;highperformance;doping 两相化合物LiFeP04和FeP04的低电子电导率使电池 的充放电容量在高倍率下急剧衰减…。原位包碳【2J合成的 产,99%)为原料,分别按LiFeP04、Lio.99FeP04、 Mgo.0l LiFeP04/C,可提高晶粒闯的电子电导率,但不能提高晶粒的 P04和LiFeo.9POa的化学计量比混匀 LiFeo,95Mgo’05 Mgo.1
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