镧掺杂对正极材料li1+xv3o8的结构及性能的影响 effect of adulterating lanthanum on structure and properties of li1+xv3o8 as cathode materials.pdfVIP
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镧掺杂对正极材料li1xv3o8的结构及性能的影响effectofadulteratinglanthanumonstructureandpropertiesofli1xv3o8ascathodematerials
镧掺杂对正极材料Lil∥308的结构及性能的影响
鲁道荣,李枝贤
(合肥工业大学化工学院,安徽合肥230009)
摘要:用甘氨酸络合制备锂离子电池正极材料Li,.xV30。,并通过镧掺杂对材料进行改性。电化学测试表明,合成的
氓“30。在室温下以10mA/g的电流放电时,其比容量高达360
mAh/g;当掺杂La后。正极材料U。j,3JaJD8的电导
率和循环性麓均比未掺杂时提高,但初始容量有所降低。采用X射线衍射光谱法(XRD)测试了正极材料Lj。+Ⅳ扣山aph
充放电前后的正极材料L.1+Ⅳ。一上ap。的形貌进行测试,发现15次循环后该材誊}的表面形虢发生很大的变化。
关键词:镧;正极材料L_1㈣;结构;性畿
912.9
中图分类号:TM 文献标识码:A 文章编号:1002-087x(2mo)04-0363-04
Effectof lanthanumonstructureand ofLi
1+xV308
adulterating properties
ascathodematerials
LU Zhi—xian
Dao—rong,LI
ofChemical A丑抽j230009,China)
(College Engineering,HeNi∽沁ers毋ofTechnology,He砖j
wasusedto thecathodematerials andthe of
Li‰Vd08 I_imVj0‰蝴啪
Abstract:Glycinsynthesize properlies
lanthanum.The testindicatesmatthecathodematerialobtainedhasa
improvedbyadulterating electrochemistry
of360 atroom atacurrentof10 lanlhanumwas
dischargecapacitymAh/g temperature mA/g.Vinlen adulterated,
theelectricalconductanceand characteristicsof were thefirst
cycle Li,。地一出p8 increased,butdischargecapacily
werereduced.Thestructureof XRD。Itshowsthediffraclion
investigatedby
Lil。【V3一曲p8(y=0,0.02,0.04,0.06)was
of
of wasincreasedwhenLanthanumwasadulterated。The testedSEM.
intensitycrystal shapeU1+√0舢
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