Thermoelectric (TE) materials could provide an efficient means for recovering waste heat energy if a low cost, scalable, and high figure-of-merit material could be fabricated. Here, we report, for the first time, a wet ball-milling method to achieve high-performance two-dimensional (2D) semi-metallic TiS₂ nanoplatelets. TiO₂ is milled, annealed, and sintered with sulfur under high pressure. The addition of a small amount of sulfur (S) powder during the annealing period prevents sulfur deficiency in the sintered compact, resulting in the formation of a near-stoichiometric TiS₂ composition. The formation of 2D TiS₂ nanoplatelets was confirmed by X-ray diffraction, field emission scanning electron microscopy with energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy. The TE properties were measured in the temperature range of 25–100 °C. Further, we obtain that the prepared TiS₂ has as high figure of merit as 0.35 at 100 °C. Novel wet ball mill processing strategies for the development of high-performance 2D materials such as TiS₂ make it possible to incorporate these materials for scaled-up device fabrication.

如果可以制造低成本、可扩展和高品质因数的材料，热电 (TE) 材料可以提供一种有效的回收废热能的方法。在这里，我们首次报告了一种湿球磨法，以实现高性能二维 (2D) 半金属 TiS ₂纳米片。TiO ₂在高压下与硫一起研磨、退火和烧结。在退火期间添加少量硫 (S) 粉末可防止烧结体中的硫缺乏，从而形成接近化学计量的 TiS ₂成分。二维 TiS ₂的形成通过 X 射线衍射、具有能量色散光谱的场发射扫描电子显微镜和 X 射线光电子能谱证实了纳米血小板。TE 特性是在 25-100 °C 的温度范围内测量的。此外，我们获得制备的 TiS ₂在 100 °C 下具有高达 0.35 的品质因数。用于开发高性能二维材料（如 TiS _2）的新型湿式球磨机加工策略使得将这些材料用于放大设备制造成为可能。