MOE Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University , Hangzhou 310027, China.
Cain Department of Chemical Engineering, Louisiana State University , Baton Rouge, Louisiana 70803, United States.
ACS Appl Mater Interfaces. 2017 Jul 5;9(26):21971-21978. doi: 10.1021/acsami.7b04505. Epub 2017 Jun 22.
Porous separators are key components for lithium-ion batteries (LIBs) and they have drawn considerable attention because of their vital role in governing battery cost and performance (e.g., power density, safety, and longevity). Here, zirconia-coated separators were fabricated via a facile biomineralization process with the aim to improve the performance of commercialized polypropylene separators. The as-prepared organic-inorganic composite separators show excellent thermal stability, even at the melting temperature (160 °C) of polypropylene. This is due to the well-distributed zirconia coatings on the separator surfaces. Furthermore, the interfacial impedance of the composite separators is only 343.8 Ω, which is four times lower than the pristine polypropylene ones. The results demonstrate an attractive method to prepare organic-inorganic composite separators with outstanding properties, which makes them promising candidates for high-performance LIBs.
多孔分离器是锂离子电池（LIB）的关键组成部分，由于它们在控制电池成本和性能（例如，功率密度、安全性和寿命）方面的重要作用，因此引起了相当大的关注。在这里，通过一种简便的生物矿化工艺制备了氧化锆涂层分离器，旨在提高商业化聚丙烯分离器的性能。所制备的有机-无机复合分离器具有优异的热稳定性，即使在聚丙烯的熔点（160°C）下也是如此。这是由于在分离器表面上均匀分布的氧化锆涂层。此外，复合分离器的界面阻抗仅为 343.8 Ω，是原始聚丙烯分离器的四倍。结果表明，这是一种制备具有优异性能的有机-无机复合分离器的有吸引力的方法，这使得它们成为高性能 LIB 的有前途的候选材料。
