高陶瓷含量复合固态电解质

Composite Solid Electrolytes with High Contents of Ceramics

全固态锂二次电池兼具高能量密度和高安全性特点。高陶瓷含量的陶瓷-聚合物复合固态电解质综合了聚合物电解质的柔韧性和陶瓷电解质的高机械强度与高锂离子迁移数等优点,有望优先其他形式固态电解质应用于全固态锂二次电池。本文在简要介绍固态复合电解质后,重点从复合电解质膜的性能特点与制备方法、陶瓷-聚合物界面相互作用以及由此导致的新的离子传导机制等方面介绍高陶瓷含量陶瓷-聚合物复合固态电解质的研究进展。最后,展望了复合固态电解质所面临的一些基础科学与应用问题,并从陶瓷-聚合物界面相互作用角度提出未来复合固态电解质的研究方向和可能的解决方案。我们希望本文对于其他传导离子的复合电解质也有借鉴和启发意义。

The all-solid secondary lithium batteries are characteristic of high energy density and high safety. Combining the high flexibility of the polymer electrolytes and the high mechanical strength and high Li-ion transference number of the ceramic electrolytes, the ceramic-polymer composite solid electrolytes with high ceramic contents(HCC) are expected to find applications prior to the other solid electrolytes in the all-solid secondary lithium batteries. Following a brief introduction on the composite solid electrolytes, the recent advances of the HCC ceramic-polymer composite electrolyte are reviewed in the general performances of the composite electrolytes, the fabrications of their membranes, the ceramic-polymer interfacial interactions and the resultant new ionic transport mechanisms. At the end of this review, we prospect the fundamental and applicable issues that the HCC composite electrolytes have to meet and propose the future research directions and possible solutions to these questions. We wish that this review could be of help for the R&D of the composite solid electrolytes of other ions as well.