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首页> 外文期刊>Physica, B. Condensed Matter >Influence of Al_2O_3 additions on crystallization mechanism and conductivity of Li_2OGe_2OP_2O _5 glass-ceramics
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Influence of Al_2O_3 additions on crystallization mechanism and conductivity of Li_2OGe_2OP_2O _5 glass-ceramics

机译：Al_2O_3的添加对Li_2OGe_2OP_2O_5玻璃陶瓷结晶机理和电导率的影响

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摘要

The crystallization mechanism and conductivity of lithium aluminum germanium phosphate [LAGP] glassceramics fabricated from Li_(1x)Al _xGe_(2-x)(PO_4)_3 (x=0.00.7) glass system were investigated as a function of Al_2O_3 additions. A non-isothermal analysis was performed to study the crystallization behavior of LAGP glassceramics at various heating rates (525K min-1) by the Kissinger equation and the AugisBennett equation, illustrating volume crystallization for the glass-ceramics. The crystal identification and microstructure in glassceramics containing various Al_2O_3 contents were analyzed by means of XRD and FESEM. The main phase of the glassceramics was found to be LiGe_2(PO_4)_3, with AlPO_4 as the impurity phase. Additionally the highest total ionic conductivity (5.8×10~(-4) S/cm) at room temperature was obtained when x=0.5 for Li_(1x)Al_xGe_(2-x)(PO _4)_3 (x=0.00.7) glassceramics, suggesting that it was a promising electrolyte for practical application in all-solid-state lithium batteries.
机译：研究了由Li_（1x）Al _xGeGe（2-x）（PO_4）_3（x = 0.00.7）玻璃系统制成的磷酸铝铝锗[LAGP]玻璃陶瓷的结晶机理和电导率随Al_2O_3添加量的变化的情况。进行了非等温分析，以通过Kissinger方程和AugisBennett方程研究了LAGP玻璃陶瓷在各种加热速率（525K min-1）下的结晶行为，从而说明了玻璃陶瓷的体积结晶。通过XRD和FESEM分析了Al_2O_3含量不同的玻璃陶瓷的晶体鉴定和微观结构。发现玻璃陶瓷的主要相为LiGe_2（PO_4）_3，其中AlPO_4为杂质相。此外，当Li_（1x）Al_xGe_（2-x）（PO _4）_3（x = 0.00.7）x = 0.5时，在室温下可获得最高的总离子电导率（5.8×10〜（-4）S / cm） ）玻璃陶瓷，这表明它是在全固态锂电池中实际应用的有前途的电解质。

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