Currently, glass fiber membrane is widely used as the separator in Li–O₂ batteries due to its high ionic conductivity, electrolyte uptake and thermal stability. Unfortunately, its high cost hinders the future commercialization of Li–O₂ battery. Herein, a cost-effective aluminum silicate fiber (ASF) membrane was utilized for the first time to replace the conventional glass fiber as the separator in Li–O₂ batteries. Thanks to the high ionic conductivity and good electrolyte wettability, batteries with ASF separator exhibit high electrochemical performance, even better than those with commercial glass fiber. In addition, the ASF membrane also shows better thermal stability under extreme conditions. Impressively, the cost of aluminum silicate fiber is less than 1% of the glass fiber (2.3 $/m² vs. 370.7 $/m²). The combination of excellent performance and low cost promises it to be an ideal substitute for the conventional glass fiber as the separator for Li–O₂ batteries.

目前，玻璃纤维膜由于其高离子传导性，电解质吸收和热稳定性而被广泛用作Li-O ₂电池的隔膜。不幸的是，其高成本阻碍了Li-O ₂电池的未来商业化。本文中，首次使用具有成本效益的硅酸铝纤维（ASF）膜代替传统的玻璃纤维作为Li–O _2中的隔膜电池。由于具有高离子电导率和良好的电解质润湿性，带有ASF隔膜的电池表现出很高的电化学性能，甚至比带有商用玻璃纤维的电池更好。此外，ASF膜在极端条件下也显示出更好的热稳定性。令人印象深刻的是，硅酸铝纤维的成本不到玻璃纤维的1％（2.3 $ / m ²与370.7 $ / m ²）。优异的性能和低成本的结合使其有望成为传统玻璃纤维作为Li–O ₂电池隔膜的理想替代品。