Department of Materials Science and Technology, City University of Hong Kong, Hong Kong, China.
Dalton Trans. 2019 Mar 14;48(10):3263-3269. doi: 10.1039/c9dt00074g. Epub 2019 Feb 18.
Solid polymer electrolytes (SPEs) have drawn considerable attention owing to their reliable safety performance, electrochemical stability and exceptional flexibility, which make them superior to conventional liquid electrolytes. Here, we report a novel composite electrolyte which is composed of homogeneously dispersed Li ion-conducting LiLaTiO (LLTO) nanowires in a poly(ethylene oxide) (PEO)/LiClO matrix. It is demonstrated that only 3 wt% LLTO nanofibers are needed for the optimal performance of SPEs. The PEO-based composite electrolyte shows an excellent Li ion conductivity of 4.01 × 10 S cm at 60 °C. In addition, it is worth mentioning that the all-solid-state lithium battery based on this composite electrolyte exhibits a specific capacity of 140 mA h g and an excellent capacity retention of 92.4% after running 100 cycles at a rate of 1C and 60 °C. The study offers a superior alternative for the design of PEO-based solid composite electrolytes.
固态聚合物电解质（SPEs）因其可靠的安全性能、电化学稳定性和出色的柔韧性而备受关注，优于传统的液体电解质。在这里，我们报告了一种新型复合电解质，它由均匀分散的锂离子导电 LiLaTiO（LLTO）纳米线组成，分布在聚（环氧乙烷）（PEO）/LiClO 基体中。结果表明，SPEs 的最佳性能仅需 3wt%LLTO 纳米纤维。基于 PEO 的复合电解质在 60°C 时表现出 4.01×10 S cm 的优异锂离子电导率。此外，值得一提的是，基于该复合电解质的全固态锂电池在 60°C、1C 的倍率下循环 100 次后，具有 140 mA h g 的比容量和 92.4%的优异容量保持率。该研究为设计基于 PEO 的固态复合电解质提供了一种卓越的替代方案。
