| Effect of Sr^2＋ on Properties of Li0.2375＋xLa0.5875-xSrxTiO3-LaPO4 System |
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| 引用本文： | 刘慧勇,王文继,李荣华,蔡增良. Effect of Sr^2＋ on Properties of Li0.2375＋xLa0.5875-xSrxTiO3-LaPO4 System[J]. 中国稀土学报(英文版), 2004, 22(2): 223-226 |
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| 作者姓名： | 刘慧勇 王文继 李荣华 蔡增良 |
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| 作者单位： | Department of Chemistry，Fuzhou University，Fuzhou 350002，China，Department of Chemistry，Fuzhou University，Fuzhou 350002，China，Department of Chemistry，Fuzhou University，Fuzhou 350002，China，Department of Chemistry，Fuzhou University，Fuzhou 350002，China |
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| 基金项目： | 国家自然科学基金，福州大学校科研和教改项目 |
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| 摘 要： | Ionicconductingsolidmaterialshavereceivedconsiderableattentioninthelastfewyearsduetotheirpotentialutilityinhighenergybatteriesandotherelec trochemicaldevices .SeveralsystemsoflithiumfastionconductorsareknowntoshowhighlithiumionconductivitysuchasγLi3PO4 typesolidsolution[1] ,LiTi2 (PO4 ) 3anditsderivations[2～4 ] andLi14 Zn(GeO4 ) 3solidsolution[5] .However ,exceptforlowpowerapplications ,onemajorproblemwiththepracticalapplicationsisitslowconductivityatroomtemperature .Recentyears ,morean…
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| 关 键 词： | 稀土 掺杂 无机化学 离子导体 电导率 XRD |
Effect of Sr2+ on Properties of Li0.2375+xLa0.5875-xSrxTiO3-LaPO4 System |
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| Liu Huiyong ,Wang Wenji,Li Ronghua,Cai Zengliang. Effect of Sr2+ on Properties of Li0.2375+xLa0.5875-xSrxTiO3-LaPO4 System[J]. Journal of Rare Earths, 2004, 22(2): 223-226 |
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| Authors: | Liu Huiyong Wang Wenji Li Ronghua Cai Zengliang |
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| Affiliation: | Liu Huiyong ~,Wang Wenji,Li Ronghua,Cai Zengliang |
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| Abstract: | Li0.2375 xLa0.5875-xSrxTiO3-LaPO4 fast ionic conductor was synthesized by high temperature solid state reaction.A.C.impedance measurements show that the system has higher conductivity in low doping content of Sr2 ,but the conductivity goes down from 5.78×10-5 to 3.11×10-7 S*cm-1 with increasing the content of Sr2 .The activation energy is about 20 kJ*mol-1 in the temperature range of 25～400 ℃.X-ray powder diffraction shows that the doping Sr2 would not affect the structure of compositions in the system.The main phase is Li0.2375 xLa0.5875-xSrxTiO3 perovskite solid solution,LaPO4 as a second phase can also be found.With increasing the content of Sr2 (x>0.05),another phase SrTiO3 appears.IR measurement also indicates that the structure of compositions in the system would not be affected by Sr2 doping.The decomposition voltage of Li0.2375 xLa0.5875-xSrxTiO3-LaPO4 remain unchanged(1.5 V). |
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| Keywords: | inorganic chemistry fast ionic conductor perovskite Sr2 dopping rare earths |
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