journal6 ›› 2009, Vol. 30 ›› Issue (3): 102-104.

• 化学化工 • 上一篇    下一篇

Li1+xAlxTi2-x(PO4)3(x=0~0.4)溶胶-凝胶法合成及其性质

  

  1. (吉首大学化学化工学院,湖南 吉首 416000)
  • 出版日期:2009-05-25 发布日期:2012-04-23
  • 作者简介:李润秀(1984-),女,山西人,吉首大学化学化工学院硕士研究生,主要从事能源材料研究.
  • 基金资助:

    国家自然科学基金资助项目(20873054);湖南省教育厅自然科学基金项目(07B060);吉首大学校级科研课题(08JDY019)

Preparation and Characterization of  Li1+xAlxTi2-x(PO4)3(x=0~0.4) by Sol-Gel Method

  1. LI Run-xiu,WU Xian-ming,CHEN Shang,HE Ze-qiang 〖WT5”〗〖JZ〗
    (College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Human China)
  • Online:2009-05-25 Published:2012-04-23

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-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Al3+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.

关键词: 溶胶-凝胶法, 固体电解质, 阻抗, 离子电导率

Abstract: Solid electrolyte Li1+xAlxTi2-x(PO4)3(x=0~0.4) was prepared using CH3COOLi·2H2O,Al(NO3)3·9H2O,(NH4)H2PO4,Ti(OC4H9)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 Al3+ 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.

Key words: sol-gel, solid state electrolyte, A C. impedance, ionic conductivity

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