Singer Célestine, Töpper Hans-Christoph, Kutsch Tobias, Schuster Robin, Koerver Raimund, Daub Rüdiger
TUMint Energy Research GmbH, Lichtenbergstraße 4, D-85747 Garching, Germany.
Institute for Machine Tools and Industrial Management, Technical University Munich, Boltzmannstraße 15, D-85748 Garching, Germany.
ACS Appl Mater Interfaces. 2022 Jun 1;14(21):24245-24254. doi: 10.1021/acsami.2c01099. Epub 2022 Apr 26.
Researchers have been working for many years to find new material and cell systems that can be used as potential post-lithium-ion batteries. Among these, the all-solid-state battery is considered a promising candidate, with sulfide-based materials having essential advantages over other solid electrolyte materials, particularly in terms of their high ionic conductivity. A great challenge, however, is their high reactivity in contact with water, where harmful hydrogen sulfide (HS) is formed. Since HS formation has implications for both worker safety and material quality, it is important to quantify its impact. For this reason, this paper examines the relationship between the product properties and the HS formation as well as influences resulting from the production environment. Exemplary material states along the process chain of a wet coating process route are analyzed for the steps of storage, mixing, coating, drying, and densifying with LiPSCl (LPSCl) as a solid electrolyte material. By determining the HS formation rate for sulfide-based separator sheets, it is shown that the water content in the surrounding atmosphere has the highest impact, while other investigated parameters are negligibly small in comparison. Among the product properties, the geometric surface and pore surface have a great influence. These results demonstrate the need for a controlled atmosphere in the production facilities at dew points of -40 to -50 °C. At those moisture levels, occupational safety and product quality are ensured for the investigated solid electrolyte sheets of LPSCl. This study is the first to provide quantitative data from the point of view of the production environment on the formation of HS gas when using solid sulfide electrolytes and can therefore serve as a guideline for equipment, material, and cell manufacturers.
多年来，研究人员一直在努力寻找可作为潜在的锂离子电池之后的新型材料和电池系统。其中，全固态电池被认为是一个很有前景的候选者，硫化物基材料相对于其他固体电解质材料具有显著优势，特别是在离子电导率方面。然而，一个巨大的挑战是它们与水接触时具有高反应性，会生成有害的硫化氢（HS）。由于HS的形成对工人安全和材料质量都有影响，因此量化其影响很重要。出于这个原因，本文研究了产品特性与HS形成之间的关系以及生产环境产生的影响。以LiPSCl（LPSCl）作为固体电解质材料，对湿涂覆工艺路线的过程链中的典型材料状态进行了分析，包括储存、混合、涂覆、干燥和致密化步骤。通过确定基于硫化物的隔膜片的HS形成速率，结果表明周围大气中的水分含量影响最大，而相比之下其他研究参数的影响可忽略不计。在产品特性中，几何表面和孔隙表面有很大影响。这些结果表明，生产设施中需要在露点为-40至-50°C的受控气氛。在这些湿度水平下，对于所研究的LPSCl固体电解质片，职业安全和产品质量能够得到保证。本研究首次从生产环境的角度提供了使用固体硫化物电解质时HS气体形成的定量数据，因此可为设备、材料和电池制造商提供指导。
