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首页> 外文期刊>ACS applied materials & interfaces >Lithium Expulsion from the Solid-State Electrolyte Li6.4La3Zr1.4Ta0.6O12 by Controlled Electron Injection in a SEM
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Lithium Expulsion from the Solid-State Electrolyte Li6.4La3Zr1.4Ta0.6O12 by Controlled Electron Injection in a SEM

机译：通过控制电子注射在SEM中的固态电解质Li6.4LA3ZR1.4TA0.6O12从固态电解质Li6.4La3 Zr1.4ta0.6o12排出锂

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摘要

The garnet ionic conductor is one of the promising candidate electrolytes for all-solid-state secondary lithium batteries, thanks to its high lithium ion conductivity and good thermal and chemical stability. However, its microstructure is difficult to approach because it is very sensitive to the inquisitive electron beam. In this study based on a scanning electron microscope (SEM), we found that the electron beam expulses the lithium out of Li6.4La3Zr1.4Ta0.6O12 (LLZTO), and the expulsed zone expands to where a stationary beam could extend and penetrate. The expulsion of metallic lithium was confirmed by its oxidation reaction after nitrogen inflow into the SEM. This phenomenon may provide us an effective probe to peer into the conductive nature of this electrolyte. A frame-scan scheme is employed to measure the expulsion rate by controllable and more uniform incidence of electrons. Lithium accumulation processes are continuously recorded and classified into four modes by fitting its growth behaviors into a dynamic equation that is mainly related to the initial ion concentration and ion migration rate in the electrolyte. These results open a novel possibility of using the SEM probe to gain dynamic information on ion migration and lithium metal growth in solid materials.
机译：由于其高锂离子电导率和良好的热和化学稳定性，石榴石离子导体是全固态二级锂电池的有希望的候选电解质之一。然而，它的微观结构难以接近，因为它对经验电子束非常敏感。在该研究基于扫描电子显微镜（SEM），我们发现电子束通过LI6.4LA3ZR1.4TA0.6O12（LLZTO）排出锂电片，并且驱逐区域扩展到固定光束可以延伸和穿透的地方。通过氮气流入SEM的氧化反应证实了金属锂的排出。这种现象可以向我们提供对该电解质的导电性质的有效探针。采用帧扫描方案来通过可控和更均匀的电子发射来测量排出率。通过将其生长行为装配到主要与电解质中的初始离子浓度和离子迁移率主要相关的动态方程，将锂积聚过程连续地记录并分为四种模式。这些结果开放了使用SEM探针获得有关固体材料离子迁移和锂金属生长的动态信息的新颖可能性。

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