Interphases Formation and Analysis at the Lithium–Aluminum–Titanium–Phosphate (LATP) and Lithium–Manganese Oxide Spinel (LMO) Interface during High‐Temperature Bonding
Interphases Formation and Analysis at the Lithium–Aluminum–Titanium–Phosphate (LATP) and Lithium–Manganese Oxide Spinel (LMO) Interface during High‐Temperature Bonding
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DOI：
10.1002/ente.202000634
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发表时间：
2020-10
影响因子：
3.8
通讯作者：
Orli Levit;Pengyu Xu;B. Shvartsev;Gal Avioz Cohen;L. Stanciu;Y. Tsur;Y. Ein‐Eli
中科院分区：
文献类型：
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作者：
Orli Levit;Pengyu Xu;B. Shvartsev;Gal Avioz Cohen;L. Stanciu;Y. Tsur;Y. Ein‐Eli
在这项研究中，描述了用于下一代全固态锂离子电池（LIB）应用的固体电解质/阴极界面的制造工艺。使用两种全固态方法组装标准磷酸锂铝钛（LATP）固体电解质和锂锰氧化物（LMO）尖晶石阴极陶瓷半电池：a）经由场辅助烧结共烧结阴极和电解质材料和B）场辅助高温结合。通过扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）分析界面的形态和组成。这项研究表明，界面相的形成可以显着减少单独进行致密化和连接程序。应用电化学阻抗谱（EIS）来理解和确定所制造的界面对系统电导率的影响。根据结果，可以得出结论，高温键合技术似乎是未来生产全固态LIB的合适技术。
In this study, fabrication processes of solid electrolyte/cathode interfaces for their use in next‐generation all‐solid‐state lithium‐ion battery (LIB) applications are described. Standard lithium–aluminum–titanium–phosphate (LATP) solid electrolyte and lithium–manganese oxide (LMO) spinel cathode ceramic half cells are assembled using two all‐solid‐state methods: a) co‐sintering the cathode and electrolyte materials via field‐assisted sintering and b) field‐assisted high‐temperature bonding. The morphology and composition of the interfaces are analyzed by scanning electron microscopy (SEM) and energy‐dispersive X‐ray spectroscopy (EDS). This study reveals that the formation of interphases can be significantly decreased by separately performing the densification and joining procedures. Electrochemical impedance spectroscopy (EIS) is applied to understand and determine the effect of the manufactured interfaces on the system conductivity. Based on the results, it is concluded that the high‐temperature bonding technique appears to be a suitable technique for future production of all‐solid‐state LIBs.