| 锂快离子导体Li1+2x+2yAlxMgyTi2-x-ySixP3-xO12系统的研究 |
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| 引用本文： | 张玉荣,王文继.锂快离子导体Li1+2x+2yAlxMgyTi2-x-ySixP3-xO12系统的研究[J].功能材料,2001,32(5):510-511. |
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| 作者姓名： | 张玉荣 王文继 |
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| 作者单位： | 福州大学化学系, |
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| 基金项目： | 国家自然科学基金资助项目(59772043) |
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| 摘 要： | 以LiTi2(PO4)3为基以天然高岭石为起始原料,经高温固相反应(～900℃)制得了一系列新的锂快离子导体材料Li1+2x+ 2yAlxMgyTi2-x-ySixP3-xO1 2(以下简称Ti-Mg-Lisicon).系统的合成温度随x和y值的增大而降低.应用交流阻抗技术测定的电导率数据结果表明x=0.1,y=0.1的合成物的室温电导率最好为1.01×10-4S/cm,而400℃时x=0.1,y=0.3的合成物的电导率最大,为2.53×10-2S/cm.XRD分析结果表明在x=0.1,y≤0.8;x=0.2,y≤0.6的组成范围内均能得到空间群为R3c的合成物.
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| 关 键 词： | 锂快离子导体 Ti－Mg－Lisicon 高岭石 |
| 文章编号： | 1001-9731(2001)05-0510-02 |
| 修稿时间： | 2000年7月12日 |
The study of new lithium fast ion conductors Li1 + 2x+ 2y Alx Mgy Ti2-x-ySix P3-x O12 system |
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| ZHANG Yu rong,WANG Wen ji.The study of new lithium fast ion conductors Li1 + 2x+ 2y Alx Mgy Ti2-x-ySix P3-x O12 system[J].Journal of Functional Materials,2001,32(5):510-511. |
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| Authors: | ZHANG Yu rong WANG Wen ji |
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| Abstract: | Refined natural kaolinite was used as a starting material for preparing new lithium fast ion
conductors of Li1+2x+yAlxYbyTi2-x-ySixP3-xO12 system by high temperature (950～1150℃) solid phase reaction for about 20h. The syntheses temperatures are lowered with increasing the
value of x and y for the system. The X-ray powder diffraction shows that a Lisicon phase with R3c space group exists in the composition
range of y=0.3, x≤0.4 and y=0.5, x≤0.3. The initial composition with y=0.3, x=0.1 possesses a maximum ionic conductivity of 2.45×10-2S/cm
at 673K and its activation energy is 38.3kJ/mol in the temperature range of 473～673K. |
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| Keywords: | Al-Yb-Lisicon fast ion conductor kaolinite |
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