可拉伸聚合物基复合固体电解质研究进展

未来可穿戴电子器件和系统需要柔性电池提供致密、安全且可靠的电能源保障。发展兼具可拉伸性和高离子电导率的固体电解质技术是实现全固态锂电池柔性化，进而满足上述要求的关键之一。本文综合评述了提升聚合物基复合固体电解质离子传导性能的主要机制和研究进展，分析了在不同尺度下解耦离子传导和力学承载功能，进而在弯折、拉伸等形变工况下维持离子传导性能稳定的策略，介绍了有助于推动可拉伸聚合物基复合固体电解质研究的几类先进表征技术，并展望了未来研究工作的重点方向。

The wearable electronics require flexible batteries to serve as power sources with high energy density, capacity, safety, and reliability. Stretchable solid electrolytes with high ionic conductivity are key to developing flexible all-solid-state lithium batteries which meet the above requirements. This paper reviews the typical mechanisms and recent progress on enhancing the ionic conductivity of composite solid polymer electrolytes. The strategies for decoupling the ionic conductivity and stretchability of solid polymer electrolytes are also discussed. The advanced characterization tools which may help to promote the study on stretchable composite solid polymer electrolytes are briefly introduced. Finally, the future trends and important directions of the technologies of stretchable composite solid polymer electrolytes are proposed as well.