Materials Science and Engineering Program and Texas Center for Superconductivity at the University of Houston, University of Houston, 4726 Calhoun Rd, Houston, Texas 77204, USA.
Department of Electrical and Computer Engineering, University of Houston, 4726 Calhoun Rd, Houston, Texas 77204, USA.
Nano Lett. 2023 May 24;23(10):4415-4422. doi: 10.1021/acs.nanolett.3c00720. Epub 2023 May 4.
All-solid-state batteries with lithium metal anodes hold great potential for high-energy battery applications. However, forming and maintaining stable solid-solid contact between the lithium anode and solid electrolyte remains a major challenge. One promising solution is the use of a silver-carbon (Ag-C) interlayer, but its chemomechanical properties and impact on interface stabilities need to be comprehensively explored. Here, we examine the function of Ag-C interlayers in addressing interfacial challenges using various cell configurations. Experiments show that the interlayer improves interfacial mechanical contact, leading to a uniform current distribution and suppressing lithium dendrite growth. Furthermore, the interlayer regulates lithium deposition in the presence of Ag particles via improved Li diffusivity. The sheet-type cells with the interlayer achieve a high energy density of 514.3 Wh L and an average Coulombic efficiency of 99.97% over 500 cycles. This work provides insights into the benefits of using Ag-C interlayers for enhancing the performance of all-solid-state batteries.
全固态电池采用金属锂作为阳极，在高能电池应用方面具有巨大的潜力。然而，在锂阳极和固体电解质之间形成和保持稳定的固-固接触仍然是一个主要挑战。一种有前途的解决方案是使用银-碳（Ag-C）中间层，但需要全面探索其化学机械性能及其对界面稳定性的影响。在这里，我们使用各种电池配置来研究 Ag-C 中间层在解决界面挑战方面的作用。实验表明，中间层改善了界面的机械接触，导致电流分布均匀，并抑制了锂枝晶的生长。此外，中间层通过改善锂离子扩散来调节存在银颗粒时的锂沉积。具有中间层的片式电池的能量密度高达 514.3 Wh/L，在 500 次循环中平均库仑效率为 99.97%。这项工作深入了解了使用 Ag-C 中间层来提高全固态电池性能的益处。
