The development of high-energy, high-safety, and high-power batteries beyond electric automotive standards is critical for future electric aviation applications. Non-volatile solid-state electrolytes (SSE) offer many promising advantages over traditional flammable liquid electrolytes. SSE may become an enabling technology for certain battery chemistries by preventing detrimental interactions that occur with liquid electrolytes, for example preventing dissolution of lithium-sulfur intermediates common in traditional liquid organic solvents. However, significant manufacturing challenges must be overcome before the adoption of such technology. One of the main challenges is the fabrication of sufficiently thin electrolyte layer to maximize specific energy of the solid-state cell. In this work we first show the feasibility in the assembly of an all solid-state battery via the development of composite SSE with ionic conductivity above 0.2mS/cm and thicknesses on the order of 40 micron through a tape-casting technique. With Li/Al alloy as the anode and TiS₂ as the active cathode material, the resultant solid-state battery with a thin electrolyte layer and excellent cathode-electrolyte interface represents a prototype vision on a potential solid-state cell required for electric aviation. A detailed parameter analysis is further presented on the influence of the various cell metrics, such as electrolyte thickness, carbon content, active material utilization, and excess lithium, on the cell specific energy. The implications in the optimization of these required parameters to enable practical solid-state Li-S batteries for electric aviation are discussed.

开发超越电动汽车标准的高能量、高安全性和高功率电池对于未来的电动航空应用至关重要。与传统的易燃液体电解质相比，非挥发性固态电解质 (SSE) 具有许多有前景的优势。SSE 可能通过防止与液体电解质发生有害相互作用而成为某些电池化学物质的使能技术，例如防止传统液体有机溶剂中常见的锂硫中间体溶解。然而，在采用这种技术之前，必须克服重大的制造挑战。主要挑战之一是制造足够薄的电解质层以最大化固态电池的比能量。在这项工作中，我们首先通过流延技术开发离子电导率高于 0.2mS/cm 且厚度约为 40 微米的复合 SSE，展示了组装全固态电池的可行性。以Li/Al合金为阳极，TiS₂作为活性阴极材料，由此产生的具有薄电解质层和优异阴极-电解质界面的固态电池代表了电动航空所需的潜在固态电池的原型愿景。详细的参数分析进一步介绍了各种电池指标对电池比能量的影响，例如电解质厚度、碳含量、活性材料利用率和过量锂。讨论了优化这些所需参数以实现用于电动航空的实用固态锂硫电池的意义。