Preparation of compact Li-doped Y2Ti2O7 solid electrolyte
學年 100
學期 1
出版（發表）日期 2012-01-01
作品名稱 Preparation of compact Li-doped Y2Ti2O7 solid electrolyte
作品名稱（其他語言）
著者 Wen, L.C.; Hsieh, H.Y.; Lee, Y.H.; Chang, S.C.; Kao, H.-C.I.; Sheu, H.S.; Lin, I.N.; Chang, J.C.; Lee, M.C.; Lee, Y.S.
單位 淡江大學化學學系
出版者 Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數 Solid State Ionics 206, pp.39–44
摘要 Three series of solid electrolytes were prepared with the nominal compositions of (Y2−xLi3x)Ti2O7 (Y3LT), (Y2−xLix)Ti2O7−x(YLT)and Y2−xTi2O7−3x/2 (YT) with x = 0.040 − 0.11. Comparing the unit cell a-axis of the YLT with that of YT, the latter is shorter with the same amount of x. This indicates a successful substitution of the Li ion into the Y site of Y2Ti2O7. However, both Y3LT and YLT have exactly the same unit cell a-axis length with the same amount of x so that the solid solution formed probably has the same formula, (Y2−xLix)Ti2O7−x, in which only one Li ion is substituted into the Y site. Extra Li2O added in the Y3LT is probably acting as a self flux to lower the melting point of the mixture. As a result, materials become more compact and grains grow bigger. One compound of Y3LT with x = 0.060 has a total conductivity of 4.3(4) × 10− 4 S⋅cm− 1 at 700 °C. Adding Li2O as a flux and carefully controlling the heat treatment history, compact sample of Y3LT with a relative density higher than 90% was obtained at a temperature as low as 1150 °C. Its ionic conductivity is comparable to one Y2Ti2O7 prepared at 1600 °C with a conductivity reported as 2.30 × 10− 4 S⋅cm− 1.
關鍵字 (Y2 − xLix)Ti2O7 − x;Pyrochlore;Titanate;Li2O;Oxygen ion conductor
語言 en
ISSN 0167-2738
期刊性質 國外
收錄於 SCI
產學合作 國內
通訊作者 高惠春
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
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