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首页> 外文期刊>ACS applied materials & interfaces >Effect of Liquid Electrolyte Soaking on the Interfacial Resistance of Li7La3Zr2O12 for All-Solid-State Lithium Batteries
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Effect of Liquid Electrolyte Soaking on the Interfacial Resistance of Li7La3Zr2O12 for All-Solid-State Lithium Batteries

机译：液体电解质浸泡对全固态锂电池Li7La3 Zr2O12界面抗性的影响

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The impact of liquid electrolyte soaking on the interfacial resistance between the garnet-structured Li7La3Zr2O12(LLZO) solid electrolyte and metallic lithium has been studied. Lithium carbonate (Li2CO3) formed by inadvertent exposure of LLZO to ambient conditions is generally known to increase interfacial impedance and decrease lithium wettability. Soaking LLZO powders and pellets in the electrolyte containing lithium tetrafluoroborate (LiBF4) shows a significantly reduced interfacial resistance and improved contact between lithium and LLZO. Raman spectroscopy, X-ray diffraction, and soft X-ray absorption spectroscopy reveal how Li2CO3 is continuously removed with increasing soaking time. On-line mass spectrometry and free energy calculations show how LiBF4 reacts with surface carbonate to form carbon dioxide. Using a very simple and scalable process that does not involve heat-treatment and expensive coating techniques, we show that the Li-LLZO interfacial resistance can be reduced by an order of magnitude.
机译：研究了液体电解质浸泡对石榴石结构Li7LA3ZR2O12（LLZO）固体电解质和金属锂之间的界面抗性的影响。通常已知通过无意地暴露于环境条件的碳酸锂（Li 2 CO 3），以增加界面阻抗和降低锂润湿性。含有含锂四氟硼酸锂（LiBF4）的电解质中的浸泡LLZO粉末和颗粒显示出锂和LLZO之间的显着降低的界面抗性和改善接触。拉曼光谱法，X射线衍射和软X射线吸收光谱揭示了随着浸泡时间的增加而连续除去Li 2 CO 3。在线质谱和自由能量计算显示Libf4如何与表面碳酸盐反应形成二氧化碳。使用不涉及热处理和昂贵的涂层技术的非常简单且可扩展的过程，我们表明Li-LLZO界面电阻可以减少一个数量级。

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