Yang Fujie, Liu Qingfeng, Xie Wenfei, Xie Pu, Shang Jingqi, Shu Xugang
GD HPPC Lab, College Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510275, China.
School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
Polymers (Basel). 2022 Mar 22;14(7):1274. doi: 10.3390/polym14071274.
Solid electrolytes have been regarded as the most promising electrolyte materials for the next generation of flexible electronic devices due to their excellent safety and machinability. Herein, composite solid electrolytes (CSE) with "polymer in ceramic" are prepared by using lithium aluminum titanium phosphate (LATP) as a matrix and modified poly(ionic liquid) as a binder. The results revealed that adding a poly(ionic liquid)-based binder not only endowed good flexibility for solid electrolytes, but also significantly improved the ionic conductivity of the electrolytes. When the content of LATP in the CSE was 50 wt.%, the electrolyte obtained the highest ionic conductivity (1.2 × 10 S·cm), which was one order of magnitude higher than that of the pristine LATP. Finally, this study also characterized the compression resistance of the composite solid-state electrolyte by testing the Vickers hardness, and the results showed that the hardness of the composite solid-state electrolyte can reach 0.9 ± 0.1 gf/mm at a LATP content of 50 wt.%.
固态电解质因其出色的安全性和可加工性，被视为下一代柔性电子器件最具前景的电解质材料。在此，以磷酸锂铝钛（LATP）为基质、改性聚（离子液体）为粘结剂制备了“陶瓷中的聚合物”复合固态电解质（CSE）。结果表明，添加基于聚（离子液体）的粘结剂不仅赋予了固态电解质良好的柔韧性，还显著提高了电解质的离子电导率。当CSE中LATP的含量为50 wt.%时，电解质获得了最高离子电导率（1.2×10 S·cm），比原始LATP高一个数量级。最后，本研究还通过测试维氏硬度对复合固态电解质的抗压性进行了表征，结果表明，在LATP含量为50 wt.%时，复合固态电解质的硬度可达0.9±0.1 gf/mm 。
