中文摘要：

以乙酸锂、硝酸铝、钛酸丁酯、磷酸二氢铵为原料，利用溶胶一凝胶法合成锂离子Li1＋xAlxTi2-x（PO4）3（x=0～0．4）固体电解质体系，检测结果表明：Li1＋xAlxTi2-x（PO4）3体系具有较好的结晶性，合成的粉末与烧结片之间的结晶性与结构差异不大；当Al^3＋掺杂量逐步增加时，离子电导率逐渐增大，并在x=0．3时达到最大值，但掺杂量进一步增加时，离子电导率迅速下降；活化能的变化趋势与离子电导率相反．

英文摘要：

Solid electrolyte Li1＋xAlxTi2-x（PO4）3（x=0～0.4） was prepared using CH3 COOLi · 2 H2 O, Al （ NO3 ） 3 · 9 H2 O, （NH4） H2PO4, Ti（OC4 H9 ）4 as raw materials by sol-gel technique. The test results show that Li1＋xAlxTi2-x（PO4）3 prepared by sol-gel has better cystallintiy. Crystallinity and structure have little difference between the powder and sintered pellet. The ionic conductivity increases first and then decreases with the increase of Al^3＋ content. When doping amount is 0.3, the ionic conductivity is higher. The change of activation energy is contrary to that of the ionic conductivity.