| Li2O-Al2O3-GeO2-P2O5微晶玻璃的微观结构和离子电导率(英文) |
| Microstructure and Ionic Conductivity of Li2O-Al2O3-GeO2-P2O5 Glass-Ceramics |
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| 摘要: 采用传统熔体冷却法制备了Li3-xAl2-xGex(PO4)3(x=1.1~1.9)体系玻璃，并通过热处理工艺获得了高电导率的微晶玻璃。通过XRD、TEM和交流阻抗等测试方法，研究了该系微晶玻璃的物相组成、微观形貌和锂离子电导率。结果表明：该系统微晶玻璃析出导电主晶相为LiGe2(PO4)3，杂质相为AlPO4和GeO2。当x=1.5时，由于导电主晶相LiGe2(PO4)3晶粒充分长大、分布均匀，所制备微晶玻璃的室温锂离子电导率最高（5.72×10-4 S·cm-1），可以满足全固态锂离子电池对电解质高室温电导率的要求。 |
| 关键词: 固体电解质 微晶玻璃 阻抗谱 电导率 |
| 基金项目: |
| Abstract: Fast lithium ion conducting glass-ceramics containing Li3-xAl2-xGex(PO4)3(x=1.1~1.9) crystalline phase were prepared from Li2O-Al2O3-GeO2-P2O5 glasses. The results indicate that the glass-ceramics are mainly composed of solid solution LiGe2(PO4)3 in the whole x range, following by a small quantity of GeO2 and AlPO4 crystals as the impurity phases. The total ionic conductivity σt reaches a maximum value of 5.72×10-4 S·cm-1 at room temperature in Li1.5Al0.5Ge1.5(PO4)3 glass-ceramic with homogeneous crystals distribution. |
| Keywords: solid electrolyte glass-ceramics impedance spectroscopy conductivity |
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| 何 坤,王衍行,祖成奎,刘永华,赵慧峰,韩 滨,陈 江.Li2O-Al2O3-GeO2-P2O5微晶玻璃的微观结构和离子电导率(英文)[J].无机化学学报,2011,27(12):2484-2488. |
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