Wei Ran, Zhang Yue, Yu Jiameng, Zhang Xinshui, Zhang Yining, Gao Tianyi, Yu Yi, Zhao Jie, Liu Wei
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China.
ACS Appl Mater Interfaces. 2024 Oct 16;16(41):55198-55205. doi: 10.1021/acsami.4c08818. Epub 2024 Oct 3.
Ta-doped LiLaZrTaO (LLZTO) for solid-state lithium batteries demonstrates encouraging performance; however, they encounter issues with lithium dendrite formation that impede their widespread use. Herein, we design a LLZTO ceramic with an interlayer containing a mixed dense layer of Ag and LLZTO, prepared by one-step sintering. The Ag-rich interlayer in LLZTO can hinder the growth and the penetration of lithium dendrites though the reaction between Ag and lithium metal. Compared with the Ag-free counterpart, a higher critical current density of 0.6 mA cm, in addition to a longer life span under a current density of 0.2 mA cm, is achieved by adopting the interlayer in LLZTO. This research offers novel insights into the engineering of garnet-based solid electrolytes, tailored for the advancement of high-rate lithium metal batteries.
用于固态锂电池的钽掺杂锂镧锆钽氧化物（LLZTO）表现出令人鼓舞的性能；然而，它们面临锂枝晶形成的问题，这阻碍了它们的广泛应用。在此，我们设计了一种LLZTO陶瓷，其具有包含银和LLZTO混合致密层的中间层，通过一步烧结制备。LLZTO中富含银的中间层可以通过银与锂金属之间的反应阻碍锂枝晶的生长和穿透。与无银的对应物相比，通过在LLZTO中采用中间层，实现了更高的临界电流密度0.6 mA/cm²，以及在0.2 mA/cm²电流密度下更长的寿命。这项研究为石榴石基固体电解质的工程设计提供了新的见解，旨在推动高倍率锂金属电池的发展。
