Yan Jianhua, Zhao Yun, Wang Xiao, Xia Shuhui, Zhang Yuanyuan, Han Yuhui, Yu Jianyong, Ding Bin
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
iScience. 2019 May 31;15:185-195. doi: 10.1016/j.isci.2019.04.028. Epub 2019 Apr 26.
Oxide ceramic materials underpin a wide variety of technologies. However, the inherent fragility of these materials limits their use in emerging fields like wearable electronics and soft energy storage devices. Here, we develop a sol-gel electrospinning technique followed by calcination to create a range of oxide ceramic nanofiber films that exhibit significant softness without fragility after various deformations. This approach causes the ceramic crystals to fuse together at a low temperature during their growth within the polymer nanofiber templates. All the synthesized ceramic films, from SiO to BaTiO, LiLaTiO, and LiLaZrO, have silk-like softness of <31 mN, low density of <0.36 g/cm and robust fire resistance to 1,000°C. Fabricated separators based on these films display large electrolyte uptakes of >900% and high thermal insulation performance, enhancing the rate capability and safety of lithium batteries. The reported method allows scalable synthesis of soft oxide ceramic films with properties appealing for applications.
氧化物陶瓷材料支撑着各种各样的技术。然而，这些材料固有的脆性限制了它们在可穿戴电子设备和软储能设备等新兴领域的应用。在此，我们开发了一种溶胶 - 凝胶静电纺丝技术，随后进行煅烧，以制备一系列氧化物陶瓷纳米纤维薄膜，这些薄膜在各种变形后仍具有显著的柔软性且不易破碎。这种方法使陶瓷晶体在聚合物纳米纤维模板内生长过程中于低温下融合在一起。所有合成的陶瓷薄膜，从SiO到BaTiO、LiLaTiO和LiLaZrO，都具有小于31 mN的丝般柔软度、小于0.36 g/cm³的低密度以及高达1000°C的强大耐火性。基于这些薄膜制造的隔膜显示出大于900%的大电解质吸收率和高隔热性能，提高了锂电池的倍率性能和安全性。所报道的方法允许可扩展地合成具有适用于应用的特性的柔软氧化物陶瓷薄膜。
