He Kun, Xie Pu, Zu Chengkui, Wang Yanhang, Li Baoying, Han Bin, Rong Min Zhi, Zhang Ming Qiu
China Building Materials Academy Beijing 100024 China.
Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GD HPPC Lab, School of Chemistry, Sun Yat-sen University Guangzhou 510275 China
RSC Adv. 2019 Jan 31;9(8):4157-4161. doi: 10.1039/c8ra08401g. eCollection 2019 Jan 30.
Solid-state electrolytes have emerged as a promising alternative to existing liquid electrolytes for next-generation flexible Li metal batteries with enhanced safety and stability. Nevertheless, the brittleness and inferior room temperature conductivity are major obstacles for practical applications. Herein, for the first time, we have fabricated a flexible lithium ion conductive glass-ceramic fiber by using a melt-spun homogeneous NASICON-type structured LiAlGe(PO) (LAGP) glass melt and annealed at 825 °C. The annealed samples exhibited a higher lithium ion conductivity than the air-quenched sample due to the presence of a well-crystallized crystal grain in the annealed sample. Meanwhile, the ionic conductivity has shown an inverse relationship with the diameter of annealed LAGP glass-ceramic fibers. The results revealed that the annealed glass-ceramic fiber, with a diameter of 10 μm, resulted in lithium ion conductivity of 8.8 × 10 S cm at room temperature.
固态电解质已成为下一代柔性锂金属电池中现有液体电解质的一种有前景的替代品，具有更高的安全性和稳定性。然而，脆性和室温下较差的导电性是实际应用的主要障碍。在此，我们首次通过使用熔纺均匀的NASICON型结构LiAlGe(PO)（LAGP）玻璃熔体并在825°C下退火制备了一种柔性锂离子导电玻璃陶瓷纤维。由于退火样品中存在结晶良好的晶粒，退火样品表现出比空气淬火样品更高的锂离子电导率。同时，离子电导率与退火LAGP玻璃陶瓷纤维的直径呈反比关系。结果表明，直径为10μm的退火玻璃陶瓷纤维在室温下的锂离子电导率为8.8×10 S cm 。
