Boehmite particles with or without hydroxyls and those of different particle sizes were coated on PE membrane with water-based slurry, and properties of coated separators were characterized. Scanning electron microscope (SEM) was used to examine the uniformity and integrity of the coatings. X-ray diffractometer (XRD) and Fourier transform infrared spectrometer (FT-IR) were used to identify the phases and hydroxyls, respectively. Half cells were assembled with metal Li and LiFePO₄ as working electrodes, and their electrochemical performance were tested. It is found that coated separators with boehmite particles and those with hydroxyls removed do not show significant difference in water wettability, neither do corresponding cells in electrochemical performance. Although boehmite particles of all sizes investigated can be coated on PE to improve separator properties and cell electrochemical performance, particles with size distribution of (D10 0.35 μm, D50 0.50 μm, D90 0.67 μm) are the most effective.

将含或不含羟基的勃姆石颗粒和不同粒径的勃姆石颗粒用水性浆料包覆在PE膜上，并表征包覆隔膜的性能。使用扫描电子显微镜 (SEM) 检查涂层的均匀性和完整性。X射线衍射仪（XRD）和傅里叶变换红外光谱仪（FT-IR）分别用于鉴定物相和羟基。半电池由金属 Li 和 LiFePO ₄组装而成作为工作电极，并测试其电化学性能。发现带有勃姆石颗粒的涂层隔膜和去除羟基的隔膜在水润湿性方面没有显着差异，相应的电池在电化学性能方面也没有表现出显着差异。尽管所研究的所有尺寸的勃姆石颗粒都可以涂覆在 PE 上以改善隔膜性能和电池电化学性能，但尺寸分布为（D10 0.35 μm、D50 0.50 μm、D90 0.67 μm）的颗粒是最有效的。